Oldsmobile Alero owners have reported 3 problems related to engine knocking noise (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Oldsmobile Alero based on all problems reported for the Alero.
1200 miles after j02 recall car runs sluggish going up canyon. Stop car and engine is misfiring. Turn around and coast downhill in neutral until check engine light turns on then stop and park car for several hours. Called dealer and asked what I should do. Coast out of the canyon with the engine off. Turn engine on after several miles and no more problems. Drive home carefully. Next day throws several codes and running sluggish. Several days later codes are gone right before it goes to dealer. They can't diagnose if car has no active codes or symptoms. About a week later turn car on and car is making a knocking sound and has several pending codes. Carefully drive home. Codes didn't save. Finally able to take to dealer around June 25th while car is making the knocking noise but no codes and they think it's a lifter but not sure. I left the car and they say they can't replicate the issue. Literally the same day I pick the car up it is knocking and consistently does so for the next week as soon as the engine warms up. July 5 engine sounds like it's being hit by a hammer and throws p0011 cam timing advanced. Oil pressure is 5psi at idle and 40psi at 5000rpm. Have car towed to dealer because it probably wouldn't make the drive and they say it is piston slap without even opening the engine they determine it is not caused by the recall. At this point the engine is sitting in my garage with the timing cover, oil pan and one valve cover off and I don't know what to do with it. I can't afford to pay them to fix something that is happening to dozens of people after the recall. I'm going to try to get the dealer to actually tear it down to diagnose it. . Codes thrown so far are p0011 p219a p0301 p000a p0420 knocking seems to be when oil warms up and oil pressure drops to about 30psi and below.
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all problems of the 2003 Oldsmobile Alero
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With vehicle warm or cold, a knocking noise can be heard. Dealer unable to correct problem, but in turn stated this was normal operation of the engine.
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all problems of the 2000 Oldsmobile Alero
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Motor making knocking noise. Was spun rod bearings. New motor installed.