possible to warp the crank shaft? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-02-2003, 12:14 AM
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Post possible to warp the crank shaft?

Hiyas ya'll. I recently let someone else attempt to put my harmonic balancer back on my engine w/o an installation tool. Apparently he used an air chisel to try and force it back on

He was unsuccessful, but I was able to clean it, lube it, get it on and torqued down. I have double and triple checked that the right amount of torque is on the bolt, yet when I start the engine the balancer still wobbles.

I was wondering if it's possible that the crank shaft was somehow warped or bent when they used the air chisel to try and force the balancer on. I need to know so that I can make him pay for me to put a new one in, or if there is anything else that would make the balancer wobble while the engine runs.

Sorry this was wordy I appreciate any help or suggestions ya'll can give.

Thanks!

gg

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Old 04-02-2003, 01:08 AM
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remove the balencer and check the keyway, check the key and the groove for excessive play, if the key way groove is damaged then another crank will be in the works unless someone else on this post can point out someone to repair the groove. also check the balencer keyway and make sure it`s not damaged, if it is, replace it, if the key fits sloppy it`ll cause a wobble. also the outer elastic rubber piece between the balencers inner and outter hub maybe about to go, if so the balencer will need replaced. good luck.
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Old 04-02-2003, 04:02 AM
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I'd check the balancer, too. Sounds like a real ham hand.
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Old 04-02-2003, 04:33 AM
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Apparently I phrased the initial question incorrectly. Apologies. The balancer that I just put on my engine was a new harmonic blancer that I went over before installation. I double checked it after the first attempt at installation and everything was fine.

Before I put it on, after hearing about the air chisel I checked the key way groove and everything seemed a-o.k. No excessive play and the dampener on the balancer was intact w/ no signs of excessive wear or dry-rot.

I will, hoever, be removing the balancer again (as I am now the proud owner of the removal tool) and double checking everything again.

Thx for the suggestions. Anyone else pls feel free to chime in w/ your thoughts.

*sigh*
gg
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Old 04-02-2003, 07:43 AM
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Does the whole engine shake or is it just the dampner? Is it a lot of "wobble" or just barely at all. Sometimes, if a crank is not balanced well, the dampner will wobble cause it is trying make up for the uneven weight distribution, thats how it works. My suggestion would be to make sure everything is tight and take it out on the road, drive it a little and see if you notice any excessive vibration.
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Old 04-02-2003, 09:48 AM
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Sounds like he damaged your new balancer, remove it and check for runout on a lathe. The outer ring can shift if he wasn't careful and pushing it back on properly can be done on a press. It is extremely unlikely he damaged the crank unless he had a 20pd sledge in there.
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