Does a timing belt have timing marks?
After you remove the top section of the timing belt cover, you should see a timing mark on the camshaft sprocket — this mark usually lines up with the edge of the cylinder head or valve cover.
What happens if the timing belt is not aligned?
If a timing belt breaks, the engine will no longer work. If a timing belt breaks while driving in an interference engine, the camshaft stops turning leaving some of the engine valves in the open position. The heavier crankshaft will continue rotating by inertia, moving pistons up and down.
How do you align a crank?
Align both the crank gear’s key and key way with the crankshaft’s key way. The crankshaft has certain timing marks on it. Align the timing marks of the crankshaft and the silent shaft sprockets to match the timing marks of the front case. When that is done, wrap the timing belt tightly around the sprockets.
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 should be the misalignment of timing belts?
MISALIGNMENT OF TIMING BELT DRIVES SHOULD BE LESS THAN 1/4° DEGREE OR 1/16 PER FOOT OF LINEAR DISTANCE. A simple procedure to check misalignment (both parallel and angular) is by using a straightedge (ruler) to check alignment as the previous illustration shows.
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.
What should be the distance between timing belt pulleys?
The straightedge should be long enough to span the distance between the two outside edges of the timing belt pulley faces. Lay the ruler across the face of the two timing belt pulleys, if the two timing belt pulley faces are not even with the straightedge than you have parallel misalignment.