What kind of noise does a Jaguar make?

Here’s an example: A customer drives his 1996 Jaguar XJ-S Coupe into a shop with an engine noise. He is convinced the rattle is so loud, there has to be serious internal engine problems and a major repair will be extremely expensive.

Why does my Jaguar XF make a ticking noise?

It usually isn’t there to begin with only starts after 5 mins or so of driving, it isn’t overly loud, radio on volume 8 is enough to disguise it but still slightly irritating when I can hear it. 4 months later… Did anyone get to the bottom of the tapping/ticking noise.

Why does my Jaguar engine rattle when I start it?

If the oil bleeds past the valve in the tensioner, the tension on the upper timing chain is temporarily lost. When the engine is started, the chain will rattle until oil pressure builds up and recharges the tensioner, stopping the rattle.

What are the symptoms of An XK8 engine stuttering?

Some XK owners report engine hesitation, stuttering and other symptoms of erratic engine operation. Have you had these experiences and solved them, or are you having them now? From new, my 1998 XK8’s engine (now 67000 miles) stutters at light acceleration, abt 2200 to 2800 rpm, as when climbing a mild hill or accelerating on a freeway ramp.

What’s the noise coming from the rear of my car?

I’d describe is as a humming/buzzing noise and it seems to come from the rear of the car. The noise does not go away unless the speed drops below 50mph. The sound does not alter if I manually change gear, and I even tried putting it into neutral and the sound continues.

Why does my car make a droning noise?

A hole in the exhaust opening up only as a certain speed is reached can produce a droning hum. A failing wheel bearing can hum or buzz or cause a tire to do so.

What to do if your Jaguar does not start?

Take your transmission shifter and put it in the “N” position from “P” and try to start the car. The shifter selector switch has been known to wear out or out of adjustment causing a no start situation. If the car does not start put it back in “P” and check the inertia switch.

What happens when you turn off the ignition on a Jaguar?

When activated, it de-energizes the ignition relays in the engine compartment, driver’s side fascia and trunk fuse boxes. It also removes ground inputs from the BPM and windshield wiper stalk switch. This stops the engine and fuel pump, unlocks any locked door, and de-energizes unnecessary electrical systems.

Why is there a noise in my engine?

This noise has been identified as “bleed down” of the upper (secondary) timing chain tensioner, resulting in temporary chain slack. A non-return valve in the tensioner is designed to trap pressurized engine oil to maintain tension on the timing chain to prevent rattling.

Noise type Description of noise Creak Metallic squeak – Like a seatback frame flexing, or two pieces of material against one another. Squeak High-pitched sound – Like rubbing a clean window. Buzz Low-pitched sound – usually associated with vibrations. Often metallic or hard plastic humming. Click Light sound – Like a ballpoint pen being clicked.

Why does my car Squeak all the time?

Current development efforts are aimed at reducing noise levels created by components such as engine, driveline and tires, but, the quieter these become, the more evident any other unwanted noises will be. Squeaks are generated through frictional contact of parts.

A hole in the exhaust opening up only as a certain speed is reached can produce a droning hum. A failing wheel bearing can hum or buzz or cause a tire to do so.

What to know about the Jaguar XJ8 Vanden Plas?

What’s most noticeable—and, consequently, notable—about driving Jaguar’s XJ8 Vanden Plas is what you don’t notice. You don’t notice any blind spots. You don’t notice any ambient road noise. You don’t notice any lag in the handling.

When did the first Jaguar XJ come out?

The Jaguar XJ is a series of full-size luxury cars produced by British automobile manufacturer Jaguar Cars (becoming Jaguar Land Rover in 2013) since 1968 across four basic platform generations (debuting in 1968, 1986, 2003 and 2009) with various updated derivatives of each.

What kind of engine does a Jaguar XJ have?

The 4.2 L XJ6 straight-6 engine (most popular in the United Kingdom) and the 5.3 L V12 XJ12 were continued with an addition of a 3.4 L (3,442 cc (210.0 cu in)) version of the XK engine available from 1975.

How to clear air suspension fault in jagrepair?

1. Park the vehicle on level ground, ensure the ignition is switched ‘OFF’, the steering is in the straight ahead position and the transmission selector lever is in park. 2. Carry out an ignition cycle; engine ‘ON’/key ‘OFF’/ignition ‘ON’/ignition ‘OFF’, to clear the ‘air suspension fault’ message from the message centre. 3.

How to reset the ecu-1 Jaguar car forum?

Restart the clock (where fitted) and set it to the correct time. Simultaneously press “>>” “PTY” “A.MEM” should only take 2 or 3 seconds and the radio turns on. 1. NOTE: After the battery has been disconnected it is necessary to

When to reset the clock on a Jaguar?

Refer to the audio systems handbook or touch-screen display handbook. • If the battery is disconnected for more than 72 hours the radio preset channels will need to be reset. • Reset the clock to the correct time.

Why does my car make a popping noise when I Park?

Begin with the vehicle on level ground, engine off (cold) in park with the emergency brake set. Step 1 – A strut or shock is designed to dampen unwanted vehicle motion, if these components wear they will become loose or leak which can create popping, banging and rattling noises.

What’s the low coolant level on a 1998 XJ?

1997 MY-ON XK8 Range 1998 MY-ON V8 XJ Series 001001-ON 812256-ON MODEL VIN Low Coolant Level – Warning Lamp Illuminated Issue: When a new vehicle is factory-filled with antifreeze solution, small pockets of air may remain trapped in the cooling system.

What happens to the coolant in a new Jaguar?

On a new vehicle, these pockets of air may take some considerable time to be purged, resulting in a gradual drop in the coolant level. This process may eventually lead to illumination of the coolant warning lamp by the low level sensor located in the coolant reservoir.

All you should be hearing is muffled road and wind noise and, if your window is open, the signature exhaust growl fed-back from anything behind you.

What to do when your Jaguar XF makes tapping noise?

Get your mate into the drivers seat and your head under the bonnet with hands away from any moving parts. Get your mate to slowly press the accelerator from the idle position to say 3000 revs while you listen for the rattle and/or watch for any movements of bits that shouldn’t.

Is the Jaguar XF a 4 cylinder car?

The XF’s are are heavier bigger car and the the 4 cylinder engine does sound a little harsh when really pushed but it still should not be making the noises you describe IMO. 4 weeks later… I’ve had the same problem.

What’s the best way to start a Jaguar?

With the car in park/neutral and the handbrake set – start the engine with the bonnet open. Get your mate into the drivers seat and your head under the bonnet with hands away from any moving parts.

What are some known problems with the Jaguar XJ8?

Some common problems reported by Jaguar XJ8 owners include unintended acceleration while braking, the vehicle failing to go into safe mode, and vibration in the rear differential.

When did Jaguar X308 XJ timing chain break?

For Jaguar X308 XJ engines produced from 1996 to 2000, the original all-plastic timing chain tensioners or guides were susceptible to stress fractures and could break apart.

What was the XJ8 driver’s door window problem?

1998 XJ8 driver’s door window problem…window stayed up. Was told i needed a new module. Disconnecting the battery worked but only for about 6 window operations. Fixed everything by removing the door module, cleaning up the terminals with a soft brass brush and applying contact cleaner before re-assembling.

How to know if your Jaguar is on or off?

Raise hood and fit fender protection covers. Remove the intake duct. With assistance, visually observe throttle butterfly operation as the ignition is switched ‘ON’ for the first time. Throttle butterfly should fully close, then immediately open to the idle position. Did butterfly stick closed? Switch ignition ‘OFF’.

https://www.youtube.com/watch?v=hnTNA4ES9Bg

How to remove the intake duct from a Jaguar?

Remove the intake duct. With assistance, visually observe throttle butterfly operation as the ignition is switched ‘ON’ for the first time. Throttle butterfly should fully close, then immediately open to the idle position. Did butterfly stick closed? Switch ignition ‘OFF’. Lightly press throttle butterfly with finger to the fully closed position.

How to program remote fob for Jaguar XK8 XKR?

Auto Reserve Jaguar – XK8 XKR Remote Fob Programming – Detailed Instructions: The procedure to program the remote fob or fobs is very simple and should take less than one minute. No tools are required. All remote fobs available must be present when the car is in programming mode, so that they can be programmed at the same time as the new fob.

How to turn on headlight flasher on XK8 XKR?

Enter the car and sit in the Drivers seat. 2. Place the key in the ignition. 3. Hold the headlight flasher arm back – the blue “high beam” light will come on the dashboard and the headlights will come on. 4. Keep holding the headlight flasher back and turn the ignition key to position 1.

Why is my remote fob not working on my Jaguar?

If you follow the procedure but still cannot program the remote fobs, there may be an internal fault with the Security Locking Module which is preventing the car from entering programming mode. In this case you will need to consult a Jaguar Dealer or Specialist.

Where is the SLM on a XK8 XKR?

To find it, open the boot and remove the battery cover. There is a fuse box assembly next to the battery. Remove the 3 x 10mm bolts holding the fusebox carrier. The SLM is underneath the fusebox carrier. Q: I have programmed the fobs successfully, but when I press the button to lock the car nothing happens!

How to troubleshoot a car that makes a whining noise?

If your car has a manual transmission, checking the fluid can be a big job. The car has to be jacked up and a check plug removed from the side of the transmission. An automatic transmission might be easier, but in recent years manufacturers have started to eliminate dipsticks and fill spouts from the user serviceable hardware.

Why does my car make noise when not in gear?

If the car doesn’t make the noise when it is not in gear, chances are it isn’t an engine noise. Race the engine gently with the car in Neutral and listen carefully for any signs of the offensive noise that are associated with the engine speed.

Why do I hear a ticking sound in my engine?

Rod knock could be the possible reason for a major engine issue. When the bearing connected to the rod wears off or gets damaged, the rod knocks around the crankshaft and creates a metal-to-metal sound. You will hear a rhythmic, loud ticking noise in engine when acceleratin g.

What happens when you disconnect the battery on a Jaguar?

When the battery is disconnected, these adaptations are lost. On reconnection, therefore, some slightly abnormal drive symptoms may occur and the vehicle may need to be driven10 miles (16 kilometres) or more while the control system re-adapts. this is a simple link for resets after battery disconnect.

How to stop engine tapping noise Jaguar XF club?

Get your mate to slowly press the accelerator from the idle position to say 3000 revs while you listen for the rattle and/or watch for any movements of bits that shouldn’t. If 3 above gets no results get your mate to step down on the accelerator to get to 3000 revs as quickly as possible and hold it there.

Why does my K20 engine make a tapping sound?

So although the tapping sound coming from the engine’s head may in fact be a problem with the tappets specifically, it could also be a problem with the camshaft, rocker arms, valves or even just a lubrication problem. Here’s What My New K20 Engine Looks Like Inside video playing Here’s What My New K20 Engine Looks Like Inside .

Why is my XJ8 engine making a noise?

Research has shown that a noise can originate at the chain tensioners to cause a resonance in another part of the engine. A revised, spring assisted, secondary timing chain tensioner has been introduced to eliminate this concern, commencing at engine No. 98102106XX. Introductory VINs are not yet available.

What to do if your 1998 XJ8 Rattle?

My 1998 XJ8 3.2 had this rattle. The best way to hear the rattle is to open the bonnet, and get someone else to start the car while you listen at the front of the engine. Make sure you have left the car overnight (really overnight) so that the tensioners have lost all their pressure.

Is there a blow by test on a Jaguar XJ8?

Jaguar dealers can perform a test to check for premature engine wear due to nikasil issues. It’s called a blow-by test. If you buy an early car from a dealer, make sure this test is gets done. Just because you have nikasil does not mean you have a bad engine. Without exposure to high sulphur fuel it will probably be OK.

What is the TSB number on a Jaguar XJ8?

The problem generally shows itself at approximately 60000 miles (100,000km) and upwards. Jaguar issued a Technical Service Bulletin (TSB) that addresses the issue. The TSB number is 303-30. Here is the text. Some vehicles within the above VIN range may experience a rattling noise when the engine is started.

What happens if you have an incorrect ignition code?

The chip in the key transmits a specific code, of which there are millions. If this code matches the ones programmed into the vehicle, engine starting is enabled. An incorrect key code, such as from an unprogrammed key or damaged key, would prevent engine starting. Code “confusion,” such as having multiple keys can also occur, preventing ignition.

Can a unworn key turn an ignition cylinder?

Or, an unworn key may not turn a worn ignition cylinder, as they haven’t “worn together.” How To Fix It: The best way to do this is to get a new lockset, with new keys and a new cylinder. You might consider getting a matched lockset that includes the door and trunk cylinders.

Why do I hear a grinding noise when I turn the ignition?

When you turn the key in your car’s ignition, you expect the engine to crank. If your ignition and charging system are in good working order, that’s generally what happens, but there are times that this might not occur. If you turn the key and hear a grinding noise, there’s a problem that must be diagnosed and repaired before the engine will crank.

Why does the Check Engine light come on on a Jaguar?

The check engine light on a Jaguar can come on for something as simple as a loose gas cap, but it can also be an indication of a serious engine problem. In this guide, you will learn about common problems that cause the Jaguar check engine light to stay on and how to diagnose the problem yourself.

Why does my lifter make a ticking noise?

If the suitable oil for the appropriate engine is not provided, then the oil will end up being too heavy or too light for the engine. This kind of improper lubrication will result in the buildup of dirt and sludge which will prevent the proper functioning of the engine by making metals come in contact to cause the tapping and ticking noise.

How to fix a noisy valve lifter in a car?

1 Flush out the old oil. Unscrew the cap under the car and place a container or bowl under the cap. 2 Rinse your valve lifter with an engine flushing agent like Liqui Moly Engine Flush after the leaking of oil has stopped. 3 Pour the new oil according to your engine specifications.

Is the Jaguar F-type V-8’s 4 wheel drive?

Starting with the 2016 model year, all V-8 F-types are 550-hp R models with four-wheel drive. The 380-hp V-6 S, however, can still be had as a tail-happy rear-driver. And for the first time, that latter F-type will offer a six-speed manual for those who, like us, wish to do their own shifting.

Is the 2014 Jaguar F-type a long-term test?

So, of course, we had to order one for a long-term test, already knowing that given Jaguar’s reputation, there could be a shipwrecked-on-the-rocks, flesh-rotting-from-your-bones end to this mission.

What’s the price of a 2014 Jaguar V-8?

We added $8825 in options to the $92,895 base price of the V-8 S, bringing the bottom line of our Firesand Orange ($600) F-type up to $101,720.

Is the Jaguar XK a four cylinder car?

Jaguar certainly did display four and six-cylinder versions of the new engine, with promotional material claiming that the sports car would appear in production as the XK100 and XK120 depending on power unit. But, vibration issues continued to plague the smaller engine, so four-cylinder engines were quietly shelved.

What causes a crack in a Jaguar XK engine?

Manufactured in 2.4l, 3.4l, 3.8l and 4.2l capacities. Cracks between the bores usually only happens on the 4.2, headgaskets occasionally fail, oil leaks from the rear crank seal common, siezed head studs, low oil pressure indicates main bearing wear or failing return valve in oil pump or faulty sender unit (min 40 psi hot).

When did the Jaguar XK engine come out?

The Jaguar XK is an inline 6-cylinder dual overhead camshaft (DOHC) engine designed by William Heynes Jaguar’s chief engineer and produced by Jaguar Cars between 1949 and 1992.

What’s the best way to stop engine noise?

1. Remove the fuel pump relay and run the engine at idle to de-pressurize the fuel system. 2. Remove the longer bolt (Illustration 1), remove the valve clamp and remove the valve. 3. Use a 3 mm Allen wrench to wind back the tensioner (clockwise) until the snail engages in the park position.

Why does my Jaguar engine keep clattering?

If Jaguar tell you that this is the problem ask them what has been done to correct the defect in the part that causes this – it is a well known defect, there are ‘revised’ parts out there but I doubt Jaguars are – or that the dealer would be willing to fit one. Any replacement with a non revised part is just a ticking clock, it will fail again.

Why does my Jaguar make a clattering noise?

Slowed down and left the car idling… constant clatter or knocking from the engine compartment, and a few times also with like metallic squeaks. Apart from the noise the engine ran just as usual. After a while I turned it off for a while and restarted again. Still clattering, although slightly less than initially.

Why does my JAG make a rattling noise when idle?

Apparently it is very common on diesel jags and fords. It invariably turns out to be the crank pulley being out of alignment together with a worn tensioner and belt replacement. My question has been is this fault common on petrol engines like mine too.

Where does the rattling sound from the idle engine come from?

I pulled up in front of the house and lifted the hood… the sound was coming from the engine .. slightly to the right, under the MAF sensor. I turned off and started the engine again and could hear nothing.

What kind of noise does a Jaguar XF make?

Ash. I have no first hand knowledge of the XF but……..it’s a Jag so there should be no niggling tapping noises. All you should be hearing is muffled road and wind noise and, if your window is open, the signature exhaust growl fed-back from anything behind you.

The car came with the usual Jaguar perks including a 2 year warranty. However, on the drive home I noticed a strange noise which occurs after about 50mph. I’d describe is as a humming/buzzing noise and it seems to come from the rear of the car. The noise does not go away unless the speed drops below 50mph.

Why does my car make a clunking noise when I turn?

When emanating from the nether regions of the front end during a turn, this sound may be traced to an outboard CV joint. CLUNK: A heavy bumping sound, softer than a clang, usually indicates you should look at suspension bushings, including shock or strut mounts.

Why does my car make a hollow sound?

If your car has air injection, perhaps the diverter valve is no longer diverting. BOOM: A hollow, low-frequency sound/sensation, this makes you feel as if you’re riding inside a metal drum and the atmospheric pressure is rapidly changing between positive and negative.

Why does the engine make noise after a hot start?

By searching the factory technical service bulletins (TSBs) contained in ALLDATA’s online professional product (www.alldata.com), the technician finds one that describes the engine problem exactly. Here’s what that TSB reveals: Some 1995-97 Jaguars with AJ6 or AJ16 engines may exhibit engine noise immediately after a cold or hot start.

Is it OK to have a noisy engine?

With more foreign manufacturers building power plants using tighter tolerances, hydraulic valve lash adjusters and serpentine belts, noisy engines are becoming a thing of the past – or are they? Rattling, knocking, thumping and squealing sounds are fine, as long as they’re coming from a haunted English castle.

When does a Jaguar XJ make a squeaking noise?

In August 2007, Jaguar issued technical bulletin JTB00055 for post-2004 model year Jaguar XJ vehicles with VINs after G00442. In some of these vehicles, a squeaking noise may be apparent from the power-assisted steering system when the steering wheel was rotated in either direction.

What was the problem with my Jaguar XJ?

Leak from air struts, apparently from both front and rear driver side. Caused car to drop several inches, worse in cold weather. Rear air shock ruptured and had to be replaced. A failure vented the air suspension system and it would not clear so car was bottomed out.

What should I do if I hear a rattle in my truck?

Broken frame crossmember? Lay underneath, spare off, with a large rubber mallet or a plastic dead-blow hammer. Start smacking things until you hear the noise. Chase it down that way. What year is the truck? How many miles?

What kind of Rattle does a spare tire make?

The most prominent rattle I hear is the cable hoist for the spare tire. I couldn’t hear anything else clearly. I assume you’ve checked the shock absorber and leaf spring bushings?

What’s the noise at the front of a Jaguar X?

Jaguar x type front end noise figured out. – YouTube Jaguar x type front end noise figured out. If playback doesn’t begin shortly, try restarting your device.

The most prominent rattle I hear is the cable hoist for the spare tire. I couldn’t hear anything else clearly. I assume you’ve checked the shock absorber and leaf spring bushings?

Why does my car make a rattling noise under the hood?

As a result, there’s a wide variety of sources that can cause rattles. Let’s start with rattling noises under the hood that are caused by oil or fuel-related problems: Your engine oil pump circulates motor oil through the engine, lubricating the internal moving parts.

What kind of transmission does a Jaguar XJ6 have?

Jaguar XJ6 Service and Repair Manual 3261 Jaguar XJ6 Models covered Jaguar XJ6 models with 3.2 litre (3239 cc), 3.6 litre (3590 cc) & 4.0 litre (3980 cc) six-cylinder in-line dohc petrol engines and automatic transmission

Why does my Jaguar X type diesel make a noise?

i been told that the tappets on xtype diesel are shimmed and it is not like a camshaft problem. i had a transit diesel 54 plate with the same noise but a lot more like a machine gun and it was the diesel pump. Hard to say without hearing it but at 10 years and 90,000 miles old it’s probably slightly worn injectors causing a bit of diesel clatter.

What to do about tappet sound in Jaguar X-type?

You could try running a couple of tanks of premium diesel through it or using some Millers or a similar additive, just in case there’s crud built up on the injector nozzles affecting the spray pattern. A good Italian tune-up would help with this too, you’ve no DPF to worry about.

Why does my Jaguar XJ6 not start up?

About half of the time, the reason why the Jaguar XJ6 will not start or quits running is because of the two main electrical problems that I described above. The other cause of the XJ6 not starting or quits running is the fuel system. Mostly, it is the fuel pump being killed by rust flakes from the two fuel tanks.

Why does my car engine run rough while idling?

When your car engine runs as it should, everything should be smooth without any noise. When any number of things goes wrong, the engine can start running rough, especially while idling. By understanding the causes of a car engine that has a rough idle, you can resolve the issue easily.

What kind of engine does a Jaguar XJ6 have?

The local mechanic Donnie Taylor, had done several engine swaps, where he replaced the Jaguar engine with either a Chevrolet Monte Carlo engine, or a Corvette engine. My father told the mechanic Donnie Taylor, to look for a good used Jaguar XJ6 for sale, to go and perform an inspection, and to bring it back if it was a good car.

Why is the fan running in my Jaguar?

Lift off the engine cover & touch one of the charge coolers, it should be noticeably cooler than the alloy intake tube that runs between the charge coolers, if it’s the same temp or warmer then i’d be looking at the intercooler coolant circuit and the electric pump. But the thermostat should also be on the list.

What should I do if my engine is surging?

There may be a fault in the computerized engine control system. Check engine control systems with a scan tool. Have a mechanic test the circuits and repair or replace components as required, since this is generally not a DIY job. The fuel filter may be partially clogged. This is an easy fix! The fix: Replace the fuel filter.

Can a mechanical problem cause an engine to misfire?

Many people also don’t realize that an engine mechanical problem can cause a misfire. Each cylinder inside the engine contains a piston that must compress the air/fuel mixture for complete combustion. And when the piston is moving upward, the cylinder must remain completely sealed off to create adequate compression.

Which is the second most common cause of an engine misfire?

The second most common cause of a misfire is bad spark plugs. The spark plugs fire up up your cylinders, and they can get worn over time. Spark plugs are often very cheap and in most cases easy to replace. If you can’t remember the last time you replaced your spark plugs, it’s probably time to replace them.

Can a bad spark plug cause an engine to misfire?

If you have separated spark plugs, unplug each coil to see if you can find out if any cylinders are not responding. Replace if you find one faulty or have a trouble code stored for one ignition coil. 2. Bad Spark Plug The second most common cause of a misfire is bad spark plugs.

Can a faulty fuel injector cause an engine to misfire?

A faulty fuel injector will cause your engine to misfire, and these can be pretty difficult to diagnose without flow testing them. Injector problems are not very common on newer cars, and because of this, you want to check out the other possible causes first, but it is absolutely worth checking.

Why does my car make a rattle sound when idling?

The other causes are the AC compressor clutch, idler pulley, or belt tensioner. The heat shields are used between the exhaust and the underside of the vehicle to keep the vehicle cool and the heat from the exhaust directed out of the tailpipe. When the heat shields become loose,…

Why does my car make a grinding noise when I start it?

A grinding noise is most frequently associated with problems with brakes, wheel bearings, water pumps, alternators and power steering pumps. Start the car. If the grinding noise starts right away or is present anytime the engine is running, pop the hood. If the grinding hasn’t started yet, skip to step three. Open the hood.

Why does my car engine make clunking noises?

Wear and tear on engine parts are unavoidable, and sometimes, even idle engines can make noises that aren’t quite right. Ideally one would only be able to hear the pistons going up and down. However, keep an eye out for other noises – such as clunking, grinding, or screeching – so that you can fix any issues before they get extensively worse.

What should I do if my car engine is making strange noises?

Strange engine noises are bad news. Do not ignore them—get it fixed or try to make DIY repairs. Your car engine is making unnatural noises and you don’t have the slightest idea what it could be.

Why does my car make a whining noise when I accelerate?

Squealing Noises When you accelerate and hear a squeal, a squeak, or a whine, odds are the cause is a worn belt. Your timing belt might whine while idling, and actually stop whining after you continue accelerating, only to return once you slow down. Your engine’s whining noise can be addressed relatively easily.

Why is my car making a high pitched chirping sound?

A loud, blowing or high pitched chirping sound in the summer is perfectly normal. During the warmer months, you are probably driving with the A/C on, and your engine is struggling to stay cool during the heat. Your car is trying to drive the A/C motor, and your radiator is working overtime to combat the excess heat.

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