What should I do if my timing belt is off?
Being off even a half tooth on some engines will be enough to cause trouble and means the job needs to be done again. After the belt is installed and the tensioner pin has been released, be sure to crank the engine over by hand a few times at least to make sure the timing marks line up at TDC each time.
What does the timing belt do on an OHC engine?
The timing belt (or chain) is the sole component that keeps the camshaft (make that camshafts on a DOHC or V-type OHC engine) and crankshaft in sync.
Where to find the TDC mark on a timing belt?
(2b) The flywheel pulley TDC mark is accessible through a hole in the bellhousing. (2c) The camshaft TDC is easy to find — especially if you add white paint as we did. We cannot stress this enough: Be careful!
What’s the difference between timing belt and timing chain?
Unlike belts, timing chains usually don’t have a routine replacement interval. The timing belt (or chain) is the sole component that keeps the camshaft (make that camshafts on a DOHC or V-type OHC engine) and crankshaft in sync.
What happens when you replace the timing belt?
If you try to remove and replace the timing belt with the engine in any other position, chances are good you’ll throw things out of time. Then you’ll get confused and have to pull off the valve cover as you try to determine when No. 1’s valves are closed (which begins the compression stroke) in order to re-index the engine.
(2b) The flywheel pulley TDC mark is accessible through a hole in the bellhousing. (2c) The camshaft TDC is easy to find — especially if you add white paint as we did. We cannot stress this enough: Be careful!
The timing belt (or chain) is the sole component that keeps the camshaft (make that camshafts on a DOHC or V-type OHC engine) and crankshaft in sync.
How long do timing belts last on econobox?
How we test gear. Timing belts last 60,000 to 100,000 miles. check your owner’s manual for the manufacturer’s replacement interval. Your six-year-old econobox is starting to show a bit of wear and tear, but everything mechanical still works fine. Until it doesn’t. Specifically, the engine suddenly goes dead silent one fine day.
Can a timing belt change cause cylinder head damage?
If the engine is quiet and only runs poorly then knock on wood that the cam timing is off a bit and that is not enough to cause any cylinder head valve damage. This is all still assuming that the problem is directly related to the timing belt installation of course. Thanks again for all the feedback.
How many timing belts does a car have?
I believe you have two timing belts, one for each head, but even if they have figured out how to use a single belt on a horizontally opposed engine, there are still two (or 4) cams to time and it only takes one to be off a notch to cause a rough idle.
Why does my car vibrate after a timing belt change?
This is easy to do as the engine tends to shift and rotate and it can be difficult to get it back in the exact orientation so that the engine mount goes back on like it was before it was removed. If it isn’t on correctly, there could be a gap which allows the engine to vibrate more than before. edit: oh, I should add a third possibility.
What happens when you change the timing belt?
He changed the timing belt, drive belts, water pump, pulleys, tensioner and a few hoses, and everything seemed to go off without a hitch. After picking up the car, though, we noticed that the idle seemed much rougher than it had in the past.
How can I tell if my timing belt is leaking?
These marks may also be displayed on a label on the timing belt cover on some engines. Check the area around the belt for signs of oil leakage. Look around the camshaft and crankshaft seals, as well as the valve cover and oil pan. Check for coolant leaks from the water pump and water pump by-pass hose.
When to replace timing belt on Toyota Tacoma?
Tundras equipped with chains were manufactured from 2005 to present, with a V6 engine, 2007 to 2014 models with a 5.7 V8, and those made in 2010 to 2014 with a 4.6 V8. If your Tacoma is a V6 from 1995 to 2004, replace the belt at 60k miles.
When to replace timing belt on Toyota Venza?
All Venzas manufactured from 2009 to the present-day have a chain, so don’t stress about the belt. If you own a 2000 to 2004 V6 Tundra get ready for a replacement by 60k miles. For a 4.7 V8 engine made between 2000 and 2009, prepare to replace the belt when the mileage reaches 90k miles.
Is the timing chain the same as the crank pulley?
The timing chain sprocket there is exactly like crank pulley, there is no keyway or setting method there and same up top. Remove the front bolt and EVERYTHING is loose. More retard Ford design. The timing chain sprocket there is exactly like crank pulley… Click to expand… Yes and no. I mostly disagree with you.
Can a crank bolt be removed from a Toyota V-8?
An impact gun can usually remove the crank bolt, but the pulley may still need to be held in place. Certain Toyotas and Lexus V-8 engines with overhead cams use a belt that winds all the way around both banks and an idler pulley, tensioner and crank gear, so proper alignment is critical, especially if it’s an interference engine.
Can a crank pulley be removed without setting TDC?
Having the motor at TDC doesn’t matter if you turn the crank without moving everything else. I’m confused. Removing the crank pulley does not take the engine internals “out of time” -especially while it is sitting in your garage. With the crank pulley removed, you should be able to turn the engine (by hand) all day long without it getting stuck.
Being off even a half tooth on some engines will be enough to cause trouble and means the job needs to be done again. After the belt is installed and the tensioner pin has been released, be sure to crank the engine over by hand a few times at least to make sure the timing marks line up at TDC each time.
What does the timing belt do in an engine?
The timing belt is an internal engine component that rotates the engine’s cam and crankshaft in sync and ensures each cylinder fires at the appropriate time.
Can a leaking timing belt cause an engine to overheat?
Leaking oil from the timing belt cover commonly results in engine overheating as well and can prematurely wear the timing belt. Often, it’s difficult to discover a problem with the timing belt until it’s too late and has broken.
When to go to the Mechanic about a bad timing chain?
If the belt is jumping because it’s gotten loose, it can also flail around and damage other parts of the engine. If your engine won’t start or starts driving rough, indicating it may be on its way to failing, contact a certified mechanic for inspection and repairs. 4. Check Engine Light is on
Where is the timing mark on a Cranshaft?
The crank timing mark will need to be about 90 degrees further on. You may need to go backwards if you feel some resistance (valves touching piston). If so manually turn the cams and try again. Now set the cams so the alignment marks are where they should be for #1 piston. Turn the crank so the marks are lined up. You now have #1 firing.
What happens if you turn the Cranshaft without timing belt?
The piston of no 1 will still be at TDC, and the valves will either be set ready to suck in fuel and air or keep closed for the piston to be pushed down by the explosion, either way it doesn’t matter as the system works on a wasted spark so it will spark at either fuel and air compressed or waste gasses having just been expelled.
Where are the timing marks on the crankshaft?
For the crankshaft below, there probably will be a timing mark on the damper pulley that lines up with another mark on the lower cover. Or, the service manual may direct you to the transmission end of the engine to look through a hole in the bellhousing for a timing mark on the flywheel.
What to do when you remove timing belt on Miata?
If you do happen to remove the belts before loosening the water pump pulley bolts, you can hold the pulley in place by wrapping the belt back around the pulley and holding it tightly, as close to the pulley as possible. Remove the Alternator belt. Loosen the alternator tensioner bolts. The bottom bolt can be difficult to get to.
Do you need to change the timing chain?
Some vehicles use a timing chain instead of a belt. If your vehicle has a timing chain, you don’t have to worry about replacing it. For the most part, timing chains don’t need to be changed unless something makes it necessary.
Where is the arrow on the timing belt?
Typically, there is a notch or a raised arrow on the bearing cap so it can be easily confirmed by eye when the two marks line up or, in the case of a stretched belt, do not line up.
An impact gun can usually remove the crank bolt, but the pulley may still need to be held in place. Certain Toyotas and Lexus V-8 engines with overhead cams use a belt that winds all the way around both banks and an idler pulley, tensioner and crank gear, so proper alignment is critical, especially if it’s an interference engine.
What’s the torque of a crankshaft bolt?
Crankshaft bolts are typically thread-locked and torqued between 120-180 ft.-lbs. (or more). An impact gun can usually remove the crank bolt, but the pulley may still need to be held in place.
How do you tension a timing belt pulley?
Place the timing belt on each timing belt pulley and ensure proper engagement between the timing belt pulley and timing belt teeth. Lengthen the center distance or adjust the tensioning idler to remove any timing belt slack. Using a tape measure, measure the span length of the drive in inches. Refer to dimension “P” in the diagram above.
Can a taut timing belt stand a strong pull?
While a taut string or timing belt can stand a strong pull. Take up any loose slack in the timing belt by adjusting the center to center distance between the two timing belt pulleys. Before any final tensioning is to be applied make sure that the timing belt teeth are fully seated in the tooth grooves on both timing belt pulleys.
How do you measure the length of a timing belt?
Lengthen the center distance or adjust the tensioning idler to remove any timing belt slack. Using a tape measure, measure the span length of the drive in inches. Refer to dimension “P” in the diagram above.