1998 CHEVY TRUCK LOOSE HARMONIC BALANCER AND PULLEY

  • Tiny
  • We Live Up To Our Name
  • 1998 CHEVROLET TRUCK

Engine problem
1998 Chevy Truck V8 Four Wheel Drive Automatic 52000 miles

I have a 1998 chevy pickup that the belt came off and when check why found harmonic balancer will move side to side loose but bolts are tight

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Saturday, January 19th, 2008 AT 7:00 PM

15 Replies

  • Tiny
  • Mastertechtim
  • MEMBER

The harmonic balancer is connected by hard rubber. The rubber on yours is no good. You must replace it. Hope this helps

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Saturday, January 19th, 2008 AT 7:03 PM
  • Tiny
  • We Live Up To Our Name
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No all of it moves side to side pulley and balancer with a pry bar

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Saturday, January 19th, 2008 AT 7:09 PM
  • Tiny
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Nope in and out but allmost like a loose bolt but bolts are tight possible something in oil pan

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Saturday, January 19th, 2008 AT 7:14 PM
  • Tiny
  • Mastertechtim
  • MEMBER

Trust me its a bad harmonic balancer. It is bolted directly to the crankshaft. If it was more than just the harmonic balancer then your engine would have blown up.

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Saturday, January 19th, 2008 AT 7:14 PM
  • Tiny
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Engine is making really hard knocking noise when running. Once it starts it shuts off moments later. Now it just hums and wont turn over, I havent put a socket and ratchet to it to turn the crank yet.

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Saturday, January 19th, 2008 AT 7:35 PM
  • Tiny
  • Mastertechtim
  • MEMBER

Now that is a different story. If your harmonic balancer is not bad. Your engine needs to be replaced. Sorry.

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Saturday, January 19th, 2008 AT 7:44 PM
  • Tiny
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The engine is a 5.7 and was running very well just out of blue pulley moves and causing the noise in side engine

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Saturday, January 19th, 2008 AT 7:44 PM
  • Tiny
  • Mastertechtim
  • MEMBER

Your crank shaft must have broke. There should be absolutely no side to side movement of the harmonic balancer

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Saturday, January 19th, 2008 AT 7:46 PM
  • Tiny
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But why would the pulley and harmonic balancer move side to side on the outside of the timing cover? I understand that the in and out could be the thrust bearing but the side to side wiggle with the bolts tight confuses me beacause it does run. So its a little hard to believe that crank shaft is broken there because if it was why wouldnt the harmonic balancer and pulley fall off?

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Saturday, January 19th, 2008 AT 7:49 PM
  • Tiny
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Thank you for all of your help. I figured that this may have been an internal problem. I have to pull oil pan and take it from there.

Thanks again.

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Saturday, January 19th, 2008 AT 7:52 PM

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