Question about 1994 Buick LeSabre

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I hear a loud knocking on the passenger side of the engine. it doesn't start until I put it into gear. It sounds like my engines going to fall apart but it is by the belts.

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One of your pulleys, tensioners, idlers, alternator, power steering pump, etc, is shot. Or the harmonic balancer. You will have to grab hold of each of these things and find out which one is loose. Or take a 3/4 dowel, 3 ft long, or broomstick, cup your hand around the end of the stick and around your ear at the same time, don't let the stick touch your ear, now put the other end carefully on an engine part that isn't moving, carefully, bolt, casting, bracket, pump, etc, you will hear what is the loudest. And the broken one. Even do the engine in a few spots, you can hear every valve. Hope this helps.

Posted on May 28, 2010

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Posted on Jan 02, 2017

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I have a 1999 Pontiac Sunfire. Transmission is going out I think. When I put it into reverse it's sometimes goes into reverse and sometimes doesn't but I hear a loud knock. fluid is right and not...


putting it into a gear and hearing a knock indicates that the engine mounts or transmission mounts are broken
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Easier to notice in a stick shift car than a automatic test by setting Ebrake and putting car into reverse go from drive to reverse in idle with foot on brake if its knocking only when you go into gear this is the problem.

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rcaf arrow: The clicking sound id probably your starter solenoid. Tis solenoid is actually a relay that connects your starter to the battery so the starter can turn the engine over to get it started.
Try knocking the starter with a hammer, (not real hard, just kinda medium) and see if that makes a difference  I suspect your starter is going bad.
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Loringh

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