What happens when a timing belt or gears fail?
If a timing belt or chain breaks, or the cam drive gears fail, the cam stops turning, the engine loses all compression and the engine stops running.
Where are the timing marks on a timing belt?
(2a) Find the timing marks on the flywheel and cam, and set them both to TDC. (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.
When is the best time to replace a timing chain?
The best time for a vehicle owner to replace a timing belt or chain is before it fails. For older (typically mid-1990s and back) engines, the recommended replacement interval for timing belts is usually 60,000 miles. On newer engines, the original equipment belts are made of better materials and usually have a service life of 100,000 miles or more.
How long does it take to replace timing belt?
Though you’ll spend only a few minutes replacing the timing belt itself, it can take an hour or more to dig down through the spaghetti of hoses, wiring and covers found in a modern engine bay. We even had to disconnect and cap a pair of fuel lines when we did the job on this VW 2.0-liter Four.
(2a) Find the timing marks on the flywheel and cam, and set them both to TDC. (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.
Though you’ll spend only a few minutes replacing the timing belt itself, it can take an hour or more to dig down through the spaghetti of hoses, wiring and covers found in a modern engine bay. We even had to disconnect and cap a pair of fuel lines when we did the job on this VW 2.0-liter Four.
Where is the timing belt on a transverse 4 cylinder engine?
On most transverse four-cylinder engines, you’ll have to remove the passenger-side motor mount in order to gain access to the timing belt. This means the entire powertrain needs to be supported in that area while you’re working. And finally, getting to the lower portion of multipiece timing belt covers usually requires underbody access.
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.