Knocking help
11-09-2009, 12:03 PM
#1
Staging Lane
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Knocking help I cranked up my car this morning and sounded unusually loud.. I got on it when driving off and heard a knocking noise. I got back home and noticed the oil was low so i added oil. The knocking is hard to hear at idle but when it gets pass 2500-3000 you being to hear it. Sounds like it is coming from right under the intake. I did let a friend drive my car last night at the drag strip and well he spun through every gear and hit the limiter in every gear (1-3)
Any ideas as to what it can be??
Oil pressure seems to be a tad lower than before but as rpms increase so does oil pressure, the car pulls fine, runs fine, idles fine, just got a knock.
Maybe cam bolts? bearings? main bearings? rods?
Everything in internal is stock besides heads and cam
Any ideas as to what it can be??
Oil pressure seems to be a tad lower than before but as rpms increase so does oil pressure, the car pulls fine, runs fine, idles fine, just got a knock.
Maybe cam bolts? bearings? main bearings? rods?
Everything in internal is stock besides heads and cam
11-11-2009, 03:24 PM
#3
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Pull your oil filter off and cut it open, search for metal shavings. Also check the magnetic drain plug. That will be a good sign of a spun bearing etc...
Your friend couuld have floated the valves bouncing off the rev limiter and done a bit of damage to your valve train from PTV contact. You could have a bent pushrod or valve, or a collapsed lifter.
Your friend couuld have floated the valves bouncing off the rev limiter and done a bit of damage to your valve train from PTV contact. You could have a bent pushrod or valve, or a collapsed lifter.
11-11-2009, 03:28 PM
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Staging Lane
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if it was the bearing the car wouldnt be running fine would it? Just odd to me. I drove it back home and parked it to get my truck ive driven it maybe 50 miles or so after i noticed it and it was no diff.
11-11-2009, 03:30 PM
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Im leaning towards the lifter by the way it sounds, a buddy of mine came and looked at it at first when i explained to him he said bearing but when he heard it he said that wasnt it. he talked to lorenz a guy he used to work for an tune ls1s around my area and he said cam bolts.
