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Removing stubborn harmonic balancer bolt

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Old 01-21-2010, 05:36 PM   #1
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Default Removing stubborn harmonic balancer bolt

Any tips?, I'm trying to remove it (5.3) to swap a Fbody HB in it's place.

I've even used my impact wrench and it's not budging.....Next step is a breaker bar, where can I insert something to keep the harmonic balancer from moving?

Bolt comes out counter-clockwise correct?
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Old 01-21-2010, 06:13 PM   #2
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It has regular threads.

I made this http://www.ls1tech.com/forums/tools-...made-tool.html and it makes removing and installing the balancer bolt pretty easy - it is now painted a nice coat of rattle can black
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Old 01-21-2010, 06:14 PM   #3
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Yes it comes out counter-clockwise. The same thought crossed my mine when I was taking mine off.

I had mine on an engine stand when I took mine off so I had more room to work. I had someone stick a 4ft pry bar between two of the three spoke (truck balancer) while I got my 24" 3/4" drive breaker bar pulling like a mad man and it finally broke lose. It just takes some time, muscle, and a few adult beverages to break it lose. Don't get frustrated and rush it will eventually come off with enough pressure. Some guys say to heat up the bolt (I wouldn't) and it will breakdown the sealant on the head, but if you do this give the bolt head enough time to cool down so you don't round it off since the metal will be softer. I also used a 15/16" socket because it fit better than the 24mm.

Good Luck!!
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Old 01-21-2010, 06:15 PM   #4
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Stick a screwdriver in the flexplate

Yes it removes just like any standard bolt
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Old 01-21-2010, 06:15 PM   #5
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counter clockwise to remove, yes

Force your compressor to pump up more by holding the shut off switch or just blow some air out to cylce it and see if you get enough pressure build to bust the bolt loose. I only remove mine with the impact.
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Old 01-21-2010, 06:15 PM   #6
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its the combination of that orange stuff on the washer head of the bolt and the fact that they are torqued to 250ft lb! they are a bitch. can you find a way (a friend)to hold the flexplate still? then put a breaker bar on the bolt. yes, it comes out counter clockwise.
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Old 01-21-2010, 07:13 PM   #7
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Quote:
Originally Posted by jomomma View Post
its the combination of that orange stuff on the washer head of the bolt and the fact that they are torqued to 250ft lb! they are a bitch. can you find a way (a friend)to hold the flexplate still? then put a breaker bar on the bolt. yes, it comes out counter clockwise.
Maybe mine wasn't that tight or I ate my Wheaties that day but I've never had that kind of problem.

I agree with jo... have someone hold the flywheel or use a screwdriver while you turn. Some cheap no name air ratchets are not very stout, if yours isn't a top brand that could be part of your problem.
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Old 01-21-2010, 10:47 PM   #8
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That bolt is tight no question.

If it's in the car take out the starter and clamp a vise grip to the flex plate so it comes up against the block. Works the same way if the engine is on the stand. The vise grip has to be ttttttite.
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Old 01-22-2010, 12:34 AM   #9
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I used a 4 ft cheater bar (pipe) on a breaker bar.. it will move once you lean into it.
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Old 01-22-2010, 05:57 AM   #10
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I found that a little heat goes a long way. Mine would not budge until I hit the bolt head with a little heat. Not enough to damage anything but enough to soften the sealant on the bolt head.
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53, balancer, bolt, broke, harmonic, installing, ls, ls1, ls6, removal, remove, removing, size, stubborn, washer

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