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Unread 04-09-2013, 12:57 PM   #1
revelc
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1985 FSJ Wagoneer 
 
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Location: Tyler, Texas
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HELP! Crank pulley wobble

Does anyone know if the harmonic balancer needs to be balanced if I replace it?

The old one started making noise and wobbling last night.

The crank pulley vibrates and makes noise above 2,000 rpm and the belts chirp. It's visibly moving at idle.

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Unread 04-09-2013, 01:13 PM   #2
RockRollin
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All pully bolts in, crank bolt tight? Is the center section of balancer turning true.
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Unread 04-09-2013, 03:32 PM   #3
timgr
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They can be rebuilt. There's a rubber zone between the hub and the pulleys. When that comes apart, they go wobbly.

http://www.damperdoctor.com/Merchant...egory_Code=HAR

Or find a good used one. They are either good or bad - you can't do anything to them yourself.
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Unread 04-09-2013, 03:43 PM   #4
revelc
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The bolts are tight. But I tried removing it with a traditional puller we had on hand and it pulled the outer section forward. You can see the rubber sticking out the back and under hard acceleration last night it started to make the noise. I am sure the vibration and noise was the balancer slipping on the rubber under load. Now looking at it idle from the side of the engine compartment you can see it wobbling.

I called Bulltear and he said I should replace it before my trip back to Texas. He also said the stock balancers are so close in terms of weight I shouldn't have to rebalance it. He didn't carry any so he recommended summit.

$150 later I should have a new one by tomorrow.
I am confident that there will be nothing original on this thing when I'm done with it.



The only OEM items left are the exhaust manifolds, front and rear axles, brakes, power steering pump (about to be replaced, pouring fluid) , starter, and alternator. The last three are supposed to be the first things everyone replaces lol.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-15-2013, 07:14 AM   #5
revelc
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Quote:
Originally Posted by revelc
The bolts are tight. But I tried removing it with a traditional puller we had on hand and it pulled the outer section forward. You can see the rubber sticking out the back and under hard acceleration last night it started to make the noise. I am sure the vibration and noise was the balancer slipping on the rubber under load. Now looking at it idle from the side of the engine compartment you can see it wobbling.

I called Bulltear and he said I should replace it before my trip back to Texas. He also said the stock balancers are so close in terms of weight I shouldn't have to rebalance it. He didn't carry any so he recommended summit.

$150 later I should have a new one by tomorrow.
I am confident that there will be nothing original on this thing when I'm done with it.

The only OEM items left are the exhaust manifolds, front and rear axles, brakes, power steering pump (about to be replaced, pouring fluid) , starter, and alternator. The last three are supposed to be the first things everyone replaces lol.
Update:
Just in case anyone else runs into this. I have an AMC 401 in my Wag. The only balancer I found that didn't cost over $300 that could be overnighted was made by professional products. It has an interchangeable counterweight for the different engine. I would recommend NOT using it. I ran into an issue with it bottoming out and the protruding counterweight was hitting my timing cover if I would have ran it it would have eaten my timing cover in seconds. So I had to risk it and only tighten it to where it had just enough clearance and used thread locker it also lined up with the belt grooves when I did this so the crank balancer needs more meat behind the flange so it won't bottom out. Their customer service guy just say there and said,"Uh, well..... I don't know what to tell you." It held up and I made it home but again. Would not recommend this set up to anyone.
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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