Author Topic: Harmonic Balancer question  (Read 569 times)

Offline zieg85

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Harmonic Balancer question
« on: July 19, 2019, 01:10:06 PM »
I have a slight vibration in my 85 C-30 with a 5.7L.  I am thinking I may need a new Harmonic Balancer.  Is there any brand names I should stay away from.  I am looking on eBay as a start. 
Carl
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline FlatBlack77

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Re: Harmonic Balancer question
« Reply #1 on: July 19, 2019, 02:33:53 PM »
Have you checked the engine and transmission mounts? I would start there
"When you are a hammer, everything looks like a nail"
'77 C/10 - 350/350 mild street motor

Offline zieg85

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Re: Harmonic Balancer question
« Reply #2 on: July 19, 2019, 03:03:31 PM »
Have you checked the engine and transmission mounts? I would start there

The transmission has been removed and was a major source of the vibration.  I still feel a little still.  I am going to take all the v-belts off next to see if anything changes.  The engine runs very smooth and sounds really good.
Carl
1985 C30 Custom Deluxe Ext. cab 5.7L TH400 3.21 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
https://www.facebook.com/groups/248658382003506/

Offline Stewart G Griffin

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Re: Harmonic Balancer question
« Reply #3 on: July 19, 2019, 04:30:27 PM »
i think pioneer and dorman have had bad reviews.   (Note: i think Dorman is ok with other parts though)


ATI, Fluidamper among others = good.