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I have a knocking sound coming from my 1994 buick LeSabre.....any ideas

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  • Audi Master
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Rear end noise, huh? I bet it is more pronounced in a turn, Right or wrong? If it is, not to worry.Chances are good you have a limited slip posit traction differential. The lubricant used must have an additive added to it that aids the mechannis ss in thier function. Take it to the dealer and have them change the super top secret differential oil and add the additive.Do not look the mechannic in the eyes or watch him put the oil and additive in or you will go blind and turn to stone so after..
Good luck.

Posted on Jun 26, 2009

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  • Audi Master
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Knocking noise is the crankshaft main bearing is worn out.

Posted on Jun 16, 2009

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1 Answer

1994 Buick LeSabre has clicking noise in steering column when reversing.


Could it be coming from the dash??? That car might be old enough to have a speedo cable. Another thought, I know some Caddys that had an automatic park brake release. You had to put it in gear for the Park brake to release. Hope that helps.

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If you can tell where the knock is coming from, it helps a great deal. I know it can be hard for a person not really trained, so I will try to keep it simple. If it sounds like it's coming from the bottom of the enginem then it's most likely a bad bearing. If it sounds like it's coming from the middle or top, then it might be a bad valve lifter or other vbalve train component failure.

I wouldn't drive it if possible and have it towed to a repair shop that you trust for diagnosis. If it is a bad bearing and you continue to drive it, it can cause total failure of the engine and extensive damage.

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I have a 1994 Buick Lesabre that suddenly devoloped a knock/ticking sound when the oil pressure gauge reads <40. If I hold the revs up till pressure goes >40 the knocking/ticking dies a little but...


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Tell somebody to rev the motor and check where the problem is from, otherwise remove serpentine belt, if it's a supercharged model remove supercharged belt before, and remove the accessories belt ! tell him to start the motor a short time to see it the knock sound is there or not, if not check each pulley if there's any loose or strange noise while turning them !

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If it knocks at 50 it will knock sitting still if you race it up. Is the oil pressure good? These motors hardly ever have a bearing problem. The only knock problem was the harmonic balacer that comes apart and knocks. The rubber falls apart and it will make a knock sound all the time, more with the ac on. If you have a knock at 50 or highway speed only you may need a outer tie rod end only. Get the front end checked as they will make a knocking sound on the highway. reply

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Sounds like a ac door actuator motor is broken,

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if you have changed oil recently (the warning is for oil life) it needs to be reset just like service reminder.

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1 Answer

Loud knocking in my 94 buick Lesabre...


Check the exhaust,you may have just broken a hanger.


Please rate this a fixya.

Feb 09, 2009 | 1994 Buick LeSabre

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