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Oil pump and pump drive

Tiny
MIKE EIDENIER
  • MEMBER
  • 1999 CHEVROLET LUMINA
  • 3.1L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 202,000 MILES
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?
Wednesday, August 17th, 2016 AT 11:58 AM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 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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Wednesday, August 17th, 2016 AT 12:07 PM
Tiny
MIKE EIDENIER
  • MEMBER
  • 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.
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Wednesday, August 17th, 2016 AT 12:18 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
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Wednesday, August 17th, 2016 AT 1:09 PM
Tiny
MIKE EIDENIER
  • MEMBER
  • 3 POSTS
Alright, starting to tear down and check the shaft. Will be back with more one way or the other I am sure.
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Wednesday, August 17th, 2016 AT 1:15 PM
Tiny
RENEE L
  • ADMIN
  • 1,257 POSTS
Please let us know what you find so it will help others
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Monday, August 29th, 2016 AT 9:42 PM

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