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Retroracer |
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#1
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Senior Member ![]() ![]() ![]() Group: Members Posts: 641 Joined: 7-July 13 From: Bend OR Member No.: 16,100 Region Association: Pacific Northwest ![]() ![]() |
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Front yard mechanic |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,350 Joined: 23-July 15 From: New Mexico Member No.: 18,984 Region Association: None ![]() ![]() |
Nice where is the like button (IMG:style_emoticons/default/driving-girl.gif)
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porschetub |
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#3
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 4,882 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None ![]() |
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Retroracer |
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#4
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Senior Member ![]() ![]() ![]() Group: Members Posts: 641 Joined: 7-July 13 From: Bend OR Member No.: 16,100 Region Association: Pacific Northwest ![]() ![]() |
porschetub - so as best I can make it out, it was a case of old, stretched cam chains and a tolerance stack up on the idler arms / Carrera tensioner combination that caused one of the chains to laterally misalign itself and rub on the casing. Made a hell of noise at the time - which I incorrectly assumed was a failed tensioner - but on pulling the engine and checking, all major components were operating as expected, most importantly, timing had not jumped.
I split the case to confirm the health of the IMS gear - all looked good. So some adjustment on the tolerancing of the idler arms and fresh chains put in, and we'll see what happens.... - Tony |
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