timint chain tensioner

[jboughto70]

Does anyone know why you need to set the timing mark on the C when installing the timing chain tensioner? The camshafts and crankshaft are fixed in position so why would this make a difference?

[randy]

You need to set the timing marks on the "C" because at this position the Camshaft is at rest. That is, no cam lobes are acting on any valves. In this postion the cam chain is at it slackest (is slackest a word?) point.

The chain tensioner's job is to take up the slack, right? If you try to adjust it with the Camshaft in any other position, you will ADD slack. Make sense?

Hope this helps.



Randy

[Ken Talbot]

And just to reinforce this message - it is absolutely critical that you do not even slightly overshoot the C mark and turn the crank backwards just a fraction to get it to line up. If you miss by even a 'hair', you must go around another complete revolution to come up to the timing mark again. It really does make a difference.