Harmonic Balancer - 1993 Buick park avenue 3.8l v6

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mmcginley497
Posts: 1
Joined: Sat Aug 17, 2013 1:08 pm

Harmonic Balancer - 1993 Buick park avenue 3.8l v6

Unread post by mmcginley497 » Sat Aug 17, 2013 1:14 pm

1993 Buick park avenue 3.8l v6

Issue just started - out of rhythm knocking or banging from best area.

This is a video I took of it yesterday:

http://www.youtube.com/watch?v=zhlQ9pQZ ... e=youtu.be

Any thoughts or ideas would be appreciated. Thanks in advance.

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carriedi
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Joined: Wed Apr 10, 2013 12:42 pm
Location: Oregon

Re: Harmonic Balancer - 1993 Buick park avenue 3.8l v6

Unread post by carriedi » Mon Aug 19, 2013 10:11 am

check and make sure the crank bolt in the center of the harmonic balancer isn't loose. Is the belt pulley part of the balancer or is it bolted on?

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TerryAuto
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Joined: Fri Dec 11, 2009 8:48 pm

Re: Harmonic Balancer - 1993 Buick park avenue 3.8l v6

Unread post by TerryAuto » Mon Aug 19, 2013 4:38 pm

Kind of hard to tell with that video, but it sounds like either a bad spot on the belt, the tensioner is popping, or yes, the harmonic balancer is bad. Check the whole belt to make sure there is not a small part hanging off.

When the balancer fails, the rubber inside that separates the outer belt pulley from the balancer is broke or worn out the 2 pieces clunk and pop together.

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