Question about 1991 Buick Riviera

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Oil Pump First I would like to say thank you to all of the people that take the time and answer all of these repair questions, I stumbled on to this site and I just think it's great how many people help. My question is how hard is it to change an oil pump in a 1991 buick riviera? Any help would be much appreciated.

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Look at oil pan if nothing is running under it it should be a easy fix drain oil, drop pan, remove oil pump, replace pump use lock tite on threads torque to specks replace oil pan fill with oil. (crank engine with out starting to get oil to into pump and circulating) ( this may not need to be done)start engine.

Posted on Jan 31, 2009

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Thank you for asking my assistance. I will try my best to help you.

I have been in the Toyota biz for the last 14 years, and, unfortunatly, have not ever heard of this issue. That being said, I do have connections in the engineering dept at Toyota, and on Monday, I will call out to the west coast and inquire further for you.
Now, to the issue at hand: The shield that was bent down is secured very well to the underside of the valve cover. To bend that device, I can only guess that when the oil was being put into the engine via an oil pump, the nozzle of the pump was *** jammed *** down onto the shield, and broke it loose from the internal retainers under the valve cover, and contacted the cam; this is very possible...I agree with the statement that your SM provided, however, further engine damage? Removal of the oil pan would be in order, to determine if any more pieces are there. Doubt it, though.
And, to answer your last question, the responsibility of the cause for failure is your oil change guy.
He bent/broke the shield, and caused your problem. I hope this has helped, if you have any other comments or questions, please feel free to repost.

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