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Registered User
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Timing Chain Tensioner Failure question?
I drove my 76 2.7 less than 2 miles yesterday at 25-30 mph, low rpm and as I got close to my driveway I started hearing a noise coming from the engine that I think may be a bad tensioner. I immediately shut it down when I heard the noise. I read this article (see below) and I'm praying that I didn't destroy the engine. How quickly will serious damage be done when a tensioner goes at the speed and duration I was doing?
Thanks 911 Timing Chain Tensioner Malfunction By Roger W. Chaney PCA Technical Committee Chairman This is a frightening experience because some very expensive noises are heard from the engine when it happens. The sound is a medium intensity ratchetting which may or may not be noticeable at idle. The noise increases up to 2500 to 3000 rpm after which it disappears. There is a danger of slipping valve timing a slight amount if you run high rpm (over 5000) or load the engine heavily with this situation. There is no danger of throwing a timing chain off its sprockets or damaging the engine if you drive conservatively until you can correct the problem.
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1976 911 Targa 2.7 CIS Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior 1963 356 SC- crashed ![]() 1962 356 C- sold ![]() 1965- 912- sold- fun but too slow |
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ROW '78 911 Targa
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Open it up and find out if that's what happened.
Replace the tensioners if that's the problem and check/set the camshaft timing. If nothing slipped you're probably OK.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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Registered User
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Great, hope you're right. No money left right now just paid 2nd daughters tuition bill.
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1976 911 Targa 2.7 CIS Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior 1963 356 SC- crashed ![]() 1962 356 C- sold ![]() 1965- 912- sold- fun but too slow |
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ROW '78 911 Targa
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Any news on the noise?
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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Registered User
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Not yet, I'm a bit crazy at my job right now but hope to check things out in a week or so. Will keep you posted and thanks for asking. Still keeping my fingers crossed.
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1976 911 Targa 2.7 CIS Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior 1963 356 SC- crashed ![]() 1962 356 C- sold ![]() 1965- 912- sold- fun but too slow |
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Registered User
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Good news!!
Quote:
Some good news, I discovered that the Head bolts were replaced by the PO.
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1976 911 Targa 2.7 CIS Sienna Metallic /Diamond Sahara # 436-9-3 - Red Interior 1963 356 SC- crashed ![]() 1962 356 C- sold ![]() 1965- 912- sold- fun but too slow |
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