oil pump and pump drive

1999 CHEVROLET LUMINA
202,000 MILES • 3.1L • 6 CYL • FWD • AUTOMATIC
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MIKE EIDENIER
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  • 3 POSTS
Oil not getting to the top of the engine. Valves and lifters making noise. Car wont stay running. How do I tell if it is the oil pump itself or if it is the pump drive?
Aug 17, 2016 at 11:58 AM
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HMAC300
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  • 48,601 POSTS
check fluid level first then check for pressure if you can find a tap plug. then pull drive and see if it has a broken shaft it may have or pin on gear. if those are okay it is either the pump or a main bearing has spun.
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Aug 17, 2016 at 12:07 PM
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MIKE EIDENIER
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  • 3 POSTS
Oil is full. no pressure that I can tell. Just replaced the pressure sensor thinking that may have been the problem. Can pull the dipstick after starting the car and it has not moved up the stick like you would see if it was pumping properly.
Aug 17, 2016 at 12:18 PM
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HMAC300
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it has a shaft about 5/16" in diameter if that is broken something got into pump like maybe a broken piece of tensioner or valve seal.
Aug 17, 2016 at 1:09 PM
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MIKE EIDENIER
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Alright, starting to tear down and check the shaft. Will be back with more one way or the other I am sure.
Aug 17, 2016 at 1:15 PM
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RENEE L
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Please let us know what you find so it will help others
Aug 29, 2016 at 9:42 PM