Question about 2003 Buick LeSabre

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2003 LeSabre small, slow thump-thump in engine compartment

With engine running while setting or at low speeds a slight thump-thump, too slow to seem to be in engine, but seems to be getting a bit more clear

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  • Don Smith
    Don Smith Jan 08, 2009

    The thump-thump is entirely too slow in frequency to be related to the rpm of the engine.

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It could be a rod in the lower part of the motor,,,thats what it sounds like to me and if it does it while you sit and idle then its in the motor somewhere

Posted on Jan 08, 2009

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Notice slight shimmy between 30 and 45... Severl tires slightly low. Put air in tires and now shimmy is worse. Again at speeds of 30 to 45 while acceleration or slowing down.


Hi,
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When car picks up speed the heat blows. when u stop or slow down. cold air blows


Tell me when you speed up is the heater set on hot and high speed?????
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My 1999 Buick Lesabre makes a whining and sometimes thumping noise when I make turns at low speeds. What could it be? It became worse after a slow turn from a driveway. At that time it made a very loud...


Sounds like a combination of a power steering pump (whine) AND the CV axle (loud clunk noise). Check the fluid level in the power steering pump. The pump is located on the passenger's side towards the firewall. Kind of hard to get at but unscrew the cover and there is a small/short dipstick there. See what it reads. Add Power Steering fluid (NOT transmission fluid, as needed. Don't overfill)
I'd get the "thumping noise" taken care of IMMEDIATELY. Could be a serious problem. Qualified front end shop should be able to diagnose and give you an estimate of cost. Last time I had one done it was about $300 parts and labor...

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1 Answer

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Check the bellows for splits, and if OK you can cut the large band that holds it in place, pull it back and check for grease, fill with grease and reattatch using a tie-strap.

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