Is there a hydraulic radiator fan for a Grand Cherokee?
Hi all I have a 2001 Grand Cherokee Limited with the 4.7L engine 2wd if that matters. This one has the Hydraulic fan which blows me away. I spent a good deal of time trying to figure out where the relay was ands there is not one. Anyway my unit is running hot after idle for say 5-10 minutes. As soon as I start moving it cools down.
Where is the temperature sensor on a Jeep Grand Cherokee?
To test the solenoid unplug the temperature sensor located between the A/C compressor and the alternator just in front of the intake manifold. If the solenoid is working properly the fan will go into Hi-speed. If there is no change in RPM of fan the solenoid or the wiring from ECM to solenoid is at fault.
Is the hydraulic radiator fan 4.7L still working?
I have a 2002 GCL 4.7L with the hydraulic fan and it has continued to work great. I had at one point considered swapping it out for an electric fan, since I am more familiar with those, but the hydraulic unit has continued to perform admirably. The fan always seems to be turning at some speed, even when cool.
Hi all I have a 2001 Grand Cherokee Limited with the 4.7L engine 2wd if that matters. This one has the Hydraulic fan which blows me away. I spent a good deal of time trying to figure out where the relay was ands there is not one. Anyway my unit is running hot after idle for say 5-10 minutes. As soon as I start moving it cools down.
To test the solenoid unplug the temperature sensor located between the A/C compressor and the alternator just in front of the intake manifold. If the solenoid is working properly the fan will go into Hi-speed. If there is no change in RPM of fan the solenoid or the wiring from ECM to solenoid is at fault.
I have a 2002 GCL 4.7L with the hydraulic fan and it has continued to work great. I had at one point considered swapping it out for an electric fan, since I am more familiar with those, but the hydraulic unit has continued to perform admirably. The fan always seems to be turning at some speed, even when cool.
What should I do about my hydraulic radiator fan?
Best is to disconnect the sensor with engine off and cold. When working there with the engine on, keep hands and clothing away from the fan and acessory drive belt. But first check the hydraulic cooling fan control fuse # 16 in the PDC.
How to remove cooling fan from Jeep garage?
1. Clean gasket mating surfaces. 2. Using a new gasket, position water pump and install mounting bolts as shown. . Tighten water pump mounting bolts to 58 N•m (43 ft. lbs.) torque. 3. Spin water pump to be sure that pump impeller does not rub against timing chain case/cover.
Who is the manufacturer of the Jeep 4.7 engine?
Who makes the Jeep 4.7 engine? Both the 4.7 and 3.7 engines are manufactured by Chrysler. Even, the first model of its kind was released in 1999. At that time, the Jeep Grand Cherokee had a 4.7-liter – V8 engine.
Are there any drawbacks to a 4.7 Jeep engine?
While there are several advantages of a 4.7 Jeep engine, there are also some drawbacks. So, here are the most common of these, along with the most effective solutions. In this way, you will have a better knowledge of your vehicle. 01. Engine Failure In this case, it is one of the most common drawbacks mentioned by Jeep users.
What to do if your Jeep Grand Cherokee cooling fan is not working?
If the fan does not operate, continue troubleshooting. Switch the wires to the opposite terminals. If the fan still does not operate, the cooling fan motor and assembly must be replaced. If the fan does operate, the vehicle must be taken into a professional service center for testing on the PCM, which controls the cooling fan relays.
What kind of engine does a Jeep Grand Cherokee have?
The 4.7 V8 engine also features a modern coil-on-plug ignition system and a hybrid cooling fan system (in-line electric and engine-driven fans). In 2002, Chrysler introduced a “High-Output” version of the 4.7L PowerTech engine as an option for the Jeep Grand Cherokee Limited and standard for the Overland models.
Why is my Jeep running hot while sitting still?
If your Jeep is running hot while sitting still your fan must be near non-functional. I will see if I can locate the operation explanation for the fan… Sounds like maybe a plugged rad or thermostat. These jeeps tend to run a bit hotter to begin with so I put a 180 degree t-stat in mine when I was chasing my cooling issues recently.
When to turn on the hydraulic radiator fan?
The hydraulic cooling fan runs at 500 rpm as soon as the engine is on, as soon as the engine temperature rises above a certain level, the PCM will command the hydraulic fan solenoid valve more open, to ramp up the fan speed.
What to do if your AC fan overheats?
When working there with the engine on, keep hands and clothing away from the fan and acessory drive belt. But first check the hydraulic cooling fan control fuse # 16 in the PDC. When that one is blown, the fan just keeps at the 500 rpm speed and you will indeed overheat after standing still for a while.
Best is to disconnect the sensor with engine off and cold. When working there with the engine on, keep hands and clothing away from the fan and acessory drive belt. But first check the hydraulic cooling fan control fuse # 16 in the PDC.
When working there with the engine on, keep hands and clothing away from the fan and acessory drive belt. But first check the hydraulic cooling fan control fuse # 16 in the PDC. When that one is blown, the fan just keeps at the 500 rpm speed and you will indeed overheat after standing still for a while.
What kind of fan does a jeep diesel engine use?
The Jeep diesel radiator fan is completely different than anything you’ve seen on other engines. Instead of using an electric fan or a mechanical fan with a viscous clutch, Jeep uses a hydraulic radiator fan. The hydraulic radiator fan receives power steering fluid pressure from the power steering pump.
Can a hydraulic fan be replaced on a jeep?
The Jeep shop manual warns that: “The hydraulic fan and drive is not serviceable. Therefore any failure of the fan blade, hydraulic fan drive or fan shroud requires replacement of the fan module because the fan blade and hydraulic fan drive are matched and balanced as a system and servicing either separately would disrupt this balance.”
Why does my Jeep Grand Cherokee Fan quit working?
In this one we take a stab at permanently fixing a common issue with the 1999-2004 Jeep Grand Cherokee. The electric cooling fan will quit working, and your jeep will overheat, due to a failure in the electronic fan control relay. This is a heat related failure and I add a large heat sink and relocate the relay to try and avoid further issues.
If your Jeep is running hot while sitting still your fan must be near non-functional. I will see if I can locate the operation explanation for the fan… Sounds like maybe a plugged rad or thermostat. These jeeps tend to run a bit hotter to begin with so I put a 180 degree t-stat in mine when I was chasing my cooling issues recently.
How does the cooling fan work on a Jeep Grand Cherokee?
The cooling fan in a Jeep Grand Cherokee keeps engine temperatures at the correct level by kicking on during times when the engine reaches higher-than-average temperatures. Without it, the engine can reach dangerous temperatures and damage engine components.
What kind of fan does a jeep radiator use?
Please try again later. This jeep uses a hydraulic fan motor to spin the cooling fan as opposed to an electric motor or direct drive from the water pump. This one was out while a new engine and radiator was being replaced and a good opportunity to let people see what these are a about.
How does a hydraulic fan work on a radiator?
This jeep uses a hydraulic fan motor to spin the cooling fan as opposed to an electric motor or direct drive from the water pump. This one was out while a new engine and radiator was being replaced and a good opportunity to let people see what these are a about.
Why is my hydraulic radiator fan always turning?
The fan always seems to be turning at some speed, even when cool. This may be due to it always having some hydraulic pressure from the power steering pump. I checked it while the AC was on last week and it really speeds up for additional cooling then. It could suck a few small birds into the grill at that point.
What causes hydraulic fan to go into Hi Speed?
If the solenoid is working properly the fan will go into Hi-speed. If there is no change in RPM of fan the solenoid or the wiring from ECM to solenoid is at fault. Using Laser Digital Tachometer to show the RPM of the fan and how it increases as the temperature rises and as the pressure rises on the A/C system.
Why does my Jeep Grand Cherokee radiator not turn on?
When the negative wire is attached to the relay, the relay should have an audible click as it activates. If the relay fails to click, move the jumper wires to the second set of terminals in the event the wrong terminals were being used. If the relay fails to click it is bad. Check the radiator fan switch if the relay proves to be good.
Where is the relay on a Jeep Grand Cherokee?
A Jeep has more than one relay that are the same (go by the relay number on the top or side of the relay) in the fuse box on the driver’s side fenderwell. Remove a known good relay and swap it with the radiator fan relay. Operate the vehicle and check the operation of the unit replaced.
When the negative wire is attached to the relay, the relay should have an audible click as it activates. If the relay fails to click, move the jumper wires to the second set of terminals in the event the wrong terminals were being used. If the relay fails to click it is bad. Check the radiator fan switch if the relay proves to be good.
A Jeep has more than one relay that are the same (go by the relay number on the top or side of the relay) in the fuse box on the driver’s side fenderwell. Remove a known good relay and swap it with the radiator fan relay. Operate the vehicle and check the operation of the unit replaced.