Quote:
Originally Posted by funola
Hmmn, do turbo and NA engines have different timing chain tensioner setups??
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Yes. the non-turbos have a Spring and Piston Tensioner and at higher Engine Speeds the Oil Pressure behind the Piston does a lot of the Work pushing the Piston out to tension the Chain Rail.
The Turbo 617 Engines have a ratcheting device that when the Piston moves out a circular Spring snaps into a Groove and prevents the Piston from being pushed Back. Oil Pressure also pushes it forward.
So while both Engines should not be turned Backwards the Turbo Engine is less likely to have a problem from that because the ratcheting device makes it difficult to push the Piston backwards.
In the pic is blow up of the part of the Tensioner Piston that has the retcheting device on the Turbo 617 Engines.