The camshaft is NOT the only mark you have to worry about, there are two marks, the one on the cam gear and the one on the crankshaft gear...e777 wrote:Please forgive my ignorance, but I have one last question before re-checking my T-belt: If the T-belt's function is to synch the crank and camshafts, and the only mark used for setting the engine at TDC is the camshaft mark, then how can we be sure the crankshaft is in synch with it? For example, if a T-belt breaks while driving, then how can one be sure the crankshaft is re-set properly in relation to the camshaft?
Picture them building a new engine at the factory...They set the crankshaft to the mark, thus it is at TDC for cylinder #1...They set the cam gear to it's mark, thus the cam is at it's proper position...Then they put the belt on and everything is automatically timed...When you replace the belt, you do the same thing...
If the belt breaks and the cam immediately stops turning, but the crank spins for another 10 or 15 revs, it doesn't matter, you jut line up the marks and put the belt back on...
You have a 740...You do not have to worry about the auxilliary shaft on the right side as you face the engine...The ignition distributor is on the back of the camshaft next to the firewall...When you time the cam you are also timing the distributor...If your car was a 240, you would also have to make sure that the auxilliary shaft on the right as you face the engine is on it's mark, too, because the disributor is in the front of the engine and is driven by that auxilliary shaft...in your car the auxilliary shaft drives the oil pump only and there is no timing involved...
Jerry