Quote:
Originally Posted by Coastr
One side is buttoned up, moving onto the other today. I elected to leave out the collars. My first rule is that the factory knew what they were doing. Ok, so the factory knew that the 'reservoir' hydraulic tensioners wouldn't last the lifetime of the engine (so they swapped to pressure fed when they decided not to end of life the 911). Actual stories of tensioner collapse are rare so I'm OK with keeping an ear to the engine (which I'm obsessed with anyway).
No doubt I'll be back under those chain covers at some point and I'll re-assess then.
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Glad you got over that hurdle. However, in many cases, the factory did get it right, but as for failed tensioners, it's not as rare as you think. Early stories of tensioner and/or chain ramp failure were more frequently reported at early 911 sites; fortunately not as much in later cars as Porsche gradually introduced the required fixes, but it took awhile.
The latest versions are called "Turbo tensioners" and the pressurized lube system introduced in '84 along with idler arm modifications have made this area fairly trouble free. Still, if you should experience any audible signs of low speed rattling, stop the engine. You know the routine.
Sherwood