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1.367m later
Join Date: Feb 2002
Location: small farm town Iowa..........at last
Posts: 6,357
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Help Diagnose engine noise
The car is a '77 911 with a 2.7 cis. It has sat unstarted for approx 9 months while being restored. Yesterday I added oil (restoration included carrera cooler upgrade so oil was drained). I charged the battery and turned the key. It cranks just fine but as it was trying to start it backfired a couple times. Nothing real big, sounded more like unburned fuel in the exhaust pipes. Once it started I notice a very pronounced squeak. I removed the a/c belt and smog pump to eliminate that possible source. It sounds very much like a valve. But my question would be "What in sitting for some time and what in trying to start it as I did would cause a bent valve"?
Second question would be, should I start it and let it run to warm it up and get oil through out the sytem in the hopes of it being a dry rocker and not a valve. Thanks,
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non velox ad propitiare, verisimile non oblivisci If it's not The Original Automotive Innovations and Restoration, then it's just hot AIR. |
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06-08-2005, 07:25 AM
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1.367m later
Join Date: Feb 2002
Location: small farm town Iowa..........at last
Posts: 6,357
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__________________
non velox ad propitiare, verisimile non oblivisci If it's not The Original Automotive Innovations and Restoration, then it's just hot AIR. |
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06-08-2005, 10:09 AM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Kevin,
Yes, I think you should start it up and let it warm up to operating temps. The squeak may be as simple as an old fan belt ... perhaps adjusted a bit too tight! If you have less than 1/2" 'give' at midpoint between alternator and crank pulley ... put another spacer under the outer pulley half!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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06-08-2005, 10:32 PM
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