1991 Buick Century Loud Knocking Noise! Please Help

PHOENIX_DOWN

MEMBER
1991 BUICK CENTURY

Engine problem
1991 Buick Century V6 Two Wheel Drive Automatic 195000 miles

Ok, When I start the car there is a loud knocking noise that sounds as if it is coming from inside the engine. The car is approximately 3-4 thousand miles past the oil change time. (Just bought the car) The noise only occurs when it is idling. When I apply gas or drive away it shifts and runs fine with no noise. I asked the guy at auto zone and he said it is most likely my lifters and recommended an oil change and sold me some fluid to "quiet noisy lifters" Does anyone have experience with this kind of thing? Please respond.

2 Replies

NDDUNC

MECHANIC
47 POSTS

Try lucas oil treatment, but by the sound of things. It dont look good for your motor. Sounds like bad main bearings. If I helped, please donate to this site

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Monday, December 10th, 2007 AT 12:45 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Yep, to me it sounds like a rod knock, but I would change the oil and filter use lucas il treatment and roll on a new oil filter while using 20/50 motor oil, here is a guide to walk you through the service.

https://www.2carpros.com/articles/how-to-change-engine-oil-and-filter

Please go over this guide and get back to us.