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2001 Oldsmobile Alero - Page 2 Questions & Answers
I think its the computer
You better get this checked out by a mechanic. This computer problem could cost a lot of money if not repaired ASAP
I have a 2001 alero
The most probable cause of both problems is with the replacement heads. As far as knocking goes, hard to diagnose from here - usual causes are a noisy hydraulic lifter (which, if severe, should be replaced) or a failing piston bearing or incorrect head/head gasket (piston banging on head which is very serious). Also, if the head gaskets were incorrectly installed or the wrong heads were used, you could have blocked some of the cooling water ports.
Overheating can also be caused by a blocked radiator - the system circulates the cooling water into the bottom of the radiator and the water cools as it circulated up to the top and back to the engine. A quick way to check when overheating is to CAREFULLY see if there is a hot-to-cooler temperature gradient in the radiator from bottom to top.
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