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Harmonic Balancer Install

Levaughn

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Feb 17, 2015
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I want to replace the Balancer/Crank seal on a 3.5 engine, 2011 Impala. When installing the Balancer could I tap it back on with a rubber or wooden mallet till the bolt catches? I don't want to do any damage to the crank bearing and can't seem to find a re install tool for that specific engine. Thanks.
 
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Levaughn

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I was thinking about doing that, but I didn't know the size of the nut. I don't want to run the risk of running the wrong rod or nut into the crank and striping the threads. I see alot of kits online but mostly for LS1 engines. My engine is a LZE. I never worried about tapping my old 350 and 327 engine balancers with a hammer, but I figured I would err on the side of caution and ask some first on this engine.
 

Neggy

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May 30, 2021
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you really want to use a installation tool, beating on them is not a good idea.

Threaded rod and washers to spread the load is the cheapest way
 

Neggy

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M12X1.5 threaded rod would be my guess, and big washers to spread/square the load

Beating balancers on these days is not a wise thing to do
 
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Levaughn

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M12X1.5 threaded rod would be my guess, and big washers to spread/square the load

Beating balancers on these days is not a wise thing to do
Thanks. I heard mention that size number but couldn't confirm it. I'll try and locate that size threaded rod.
 

2ndGearRubber

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You can buy a master installer kit for 100 or so online.

If you're a bad boy, you can also just tap it on lightly with your palm, then use the bolt to pull it on.
 

signcrafter

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May 9, 2012
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I have the lisle set and also a blue point set I bought used. I havent ran into anything they cant do. Also if you dont want to buy a kit i think the parts stores loan the installer kits.
 
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charbar

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Feb 6, 2021
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If you do the tap on/pull the rest of the way on method make damn sure you have enough threads engaged!! If the balancer is a tight fit there is a possibility of screwing up the threads. I've done quite a few this way if I didn't have the correct installer and never had an issue.

GM says to replace the crank bolt with a new one anyway. You could always just measure the new crank bolt you get and make your own install tool with threaded rod.
 

crewchief888

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Levaughn

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That was my first thought, but not knowing when I was going to tackle the job, I didn't want to hold the tool up for someone else.
 

mikester

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Dec 27, 2007
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small town NY
I used the set from autozone. Liked it so much I went to a new store that just opened and basically bought a set that wasnt even opened. Got a removal set and a coil spring compressor at the same time.
Getting them new was a plus. Lots of guys dont lube the threads and screw them up.
 

BOOT

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Nov 9, 2015
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Bought a car that had terrible crank pulley wobble. When taken off, I saw underneath the damper was smashed in partly where the pulley lip went into it. That spot is where a hammer must of hit good and that's why the pulley was wobbling. New damper and it was all good but if I hadn't noticed then my new UD pulley set may have thrown a belt.

I've used a block of wood and hammered one on but I'm sure the thrust bearing wasn't happy.

Most parts places loan/rent an installer.
 
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Levaughn

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Thanks for all the input. I will buy an install set. This way I have the extra adapters for other cars. Thanks again!
 
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