Quote:
Originally Posted by JFP in PA
It's pretty simple actually; if the cam deviations are steady and outside +/- 6 degrees, you need chain wear pads. If the numbers are outside spec, but bouncing around all over the place, something is moving in the cam drive, usually the IMS shaft.
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I was thinking of the more obscure causes like a bent reluctor . worn chin links,weak chain Tensioner(on the IMS to cam chain) , leaking oil past a worn piston/Actuator. I have no idea if any of these are significant ,nor if there are others.
There are some excellent Threads on Rennlist that stress simple things like making sure the engine is thoroughly warmed up before accepting a Deviation reading.
https://www.renntech.org/forums/topic/46101-camshaft-position-1-deviation-of-897/?_fromLogin=1