bent crank pulley: replace or fix? - Team Camaro Tech
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post #1 of 7 (permalink) Old Sep 19th, 05, 03:10 PM Thread Starter
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bent crank pulley: replace or fix?

My '68 Camaro w/orig 350 has a two-row crank pulley that has a pretty good wobble to it. The steering pump pulley (on top of it) is straight and runs true. Is there a way to bend back the bent crank pulley or should it just be replaced?
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post #2 of 7 (permalink) Old Sep 19th, 05, 08:52 PM
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Re: bent crank pulley: replace or fix?

Probably needs replacing. I have the pulley from my 327 that I am rebuilding. I got a set of March billet pulleys for the rebuild. It has three grooves. If it will work let me know. I will send it to you - free.
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post #3 of 7 (permalink) Old Sep 19th, 05, 10:24 PM Thread Starter
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Re: bent crank pulley: replace or fix?

Quote:
Originally Posted by ghack
Probably needs replacing. I have the pulley from my 327 that I am rebuilding. I got a set of March billet pulleys for the rebuild. It has three grooves. If it will work let me know. I will send it to you - free.
I sent you a private message.
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post #4 of 7 (permalink) Old Sep 20th, 05, 05:28 AM
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Re: bent crank pulley: replace or fix?

Quote:
Originally Posted by DanW
My '68 Camaro w/orig 350 has a two-row crank pulley that has a pretty good wobble to it. The steering pump pulley (on top of it) is straight and runs true. Is there a way to bend back the bent crank pulley or should it just be replaced?
Got any idea how the pulley got bent??? Is it bent or just not fitting in the harmonic balancer??? I've seen the face of the balancer with strange looking marks, like someone beat the crap out of the thing putting it on. That will distort the hole and the pulley won't set flat.

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post #5 of 7 (permalink) Old Sep 20th, 05, 06:10 AM
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Re: bent crank pulley: replace or fix?

My water pump was like that too. I found a bur <sp> at one thread hole and I must have went in a circle when I tightened up the bolts. Redid the bolts, filed bur<sp> still has the slightest wobble... I may have flexed it or the powder coating is un-even ?

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1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #6 of 7 (permalink) Old Sep 20th, 05, 04:05 PM Thread Starter
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Re: bent crank pulley: replace or fix?

The balancer is new and installed with the correct tool. I installed both pulleys with the engine out on a stand. I only noticed the wobble when breaking in the motor. The two-groove pulley came with the car and I added the third outer pulley for power steering. I'm not certain if it wobbled that much before, but I believe I installed everything correctly since the outer pulley doesn't wobble also.
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post #7 of 7 (permalink) Old Sep 21st, 05, 02:59 PM
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Re: bent crank pulley: replace or fix?

I wouldn't go running that engine into high RPM range until you fix the pully. The added vibration will do the rotating assembly no favors at all, and could even cause a catostrophic failure if the wobble is severe enough.

Possible failures could range from the pully vibrating loose and richocheting around you engine compartment until it punches a hole through something like your oil pan, hood or radiator. Worse case will include that and your engine grenading under the vibration.

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