Author Topic: Wobbly crankshaft pulley  (Read 3730 times)

Offline dar06003

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Wobbly crankshaft pulley
« on: February 11, 2017, 05:48:23 pm »
I just changed the harmonic balancer on my 5.0 c10, but the crankshaft pulley still seems to be wobbly. I think it improved a little after the new harmonic balancer, but still seems off. Do I need to change the pulley too?


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Offline Captkaos

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Re: Wobbly crankshaft pulley
« Reply #1 on: February 12, 2017, 08:41:05 am »
Did you replace the balancer because it was wobbly?  Did you check (as best you could) that the pulley wasn't bent first?
Was it seated well on the balancer?

Offline dar06003

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Re: Wobbly crankshaft pulley
« Reply #2 on: February 12, 2017, 08:25:57 pm »
Did you replace the balancer because it was wobbly?  Did you check (as best you could) that the pulley wasn't bent first?
Was it seated well on the balancer?
The pulley didn't look bent. I don't have an impact, but I torqued everything down with the belts on.


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Offline dar06003

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Re: Wobbly crankshaft pulley
« Reply #3 on: February 12, 2017, 08:32:57 pm »
Did you replace the balancer because it was wobbly?  Did you check (as best you could) that the pulley wasn't bent first?
Was it seated well on the balancer?
The pulley didn't look bent. I don't have an impact, but I torqued everything down with the belts on.


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I replaced the harmonic balancer because it was wobbly


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Offline Jason S

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Re: Wobbly crankshaft pulley
« Reply #4 on: February 13, 2017, 04:52:39 pm »
I'd remove belts, remove pulley and run engine to verify balancer isn't wobbling or cocked during install.

If good, then put on pulley and ensure it's seated on balancer and tighten bolts - run engine to verify true.
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1974 Chevrolet K10, Custom Deluxe, 350, SM465, NP203, 3.73's

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Offline FlatBlack77

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Re: Wobbly crankshaft pulley
« Reply #5 on: February 13, 2017, 10:26:11 pm »
just how wobbly are we talkin here?
"When you are a hammer, everything looks like a nail"
'77 C/10 - 350/350 mild street motor