The harmonic balencer wont spin

Tiny
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  • 1992 CHEVROLET TRUCK
  • 218,000 MILES
Me and my friend took apart my 350 5.7 chevy motor aprt to replace most gaskets. We got it all back together and now the harmonic balencer wont spin. My friend was thinking maybe we tightend the rockers down to tight. He said we didnt mess with anything that would keep it from spinning
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Monday, April 23rd, 2012 AT 12:19 AM

15 Replies

Tiny
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Something is locking it up. Most likely a tight bearing. Remove the pan and re check your bearings.

Roy
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Monday, April 23rd, 2012 AT 12:37 AM
Tiny
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Okay. Is that all that may be stopping it from turning?
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Monday, April 23rd, 2012 AT 1:16 AM
Tiny
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It is a start. There may be more but you need to get the pan off and make sure there is nothing else wrong. Did you have the pistons out?

Roy
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Monday, April 23rd, 2012 AT 1:19 AM
Tiny
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No we left them alone. But my buddy did pull the cam out a little bit to cheack and make sure it looked good and had no scratches or dings on it
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Monday, April 23rd, 2012 AT 1:30 AM
Tiny
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Did you remove the lifters too?

Roy
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Monday, April 23rd, 2012 AT 1:45 AM
Tiny
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No we also left them alone he pulled them up so they wasnt down when he pulled the cam out a bit
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Monday, April 23rd, 2012 AT 1:48 AM
Tiny
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This may be the area you may want to check. The lifters need to be removed completely to remove the cam.

Roy
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Monday, April 23rd, 2012 AT 1:50 AM
Tiny
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Okay. And I Have not yet adjusted the rockers. I need to get a feeler guage and adjust and set the valve clearence from the rockers. Could that also be what it is?
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Monday, April 23rd, 2012 AT 1:53 AM
Tiny
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If they are hydraulic, no. You set them to zero lash and tighten 1/2 turn.

Roy
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Monday, April 23rd, 2012 AT 1:56 AM
Tiny
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No they are not hydraulic. So that may be why?
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Monday, April 23rd, 2012 AT 2:06 AM
Tiny
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They should be.020 on the intake and.18 on the exhaust. This is assuming the cam is not a full race cam.

Roy
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Monday, April 23rd, 2012 AT 2:11 AM
Tiny
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Whats that mean? My buddy is the one that knows more than me im new to it all haha.
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Monday, April 23rd, 2012 AT 2:24 AM
Tiny
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Im sure he will know. Thank you much for the help! If it still dont spin I will be back on here.
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Monday, April 23rd, 2012 AT 2:32 AM
Tiny
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Good luck
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Monday, April 23rd, 2012 AT 2:41 AM
Tiny
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Thanks!
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Monday, April 23rd, 2012 AT 2:52 AM

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