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Knocking Engine

Tiny
BLKBLUR
  • MEMBER
  • GMC SIERRA
I have a 96 GMC 3/4 ton P/U 5.7L-128000 miles. My engine knocks really loudly upon start-up but goes away after it's warmed up. I also have a front intake manifold leak(Could this be the cause for the knocking?) . What needs to be removed to do an intake manifold job? Thanks!
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Saturday, November 3rd, 2007 AT 10:21 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
It very well could. To replace it you have to take off the throttle body, air intake hoses, IAT sensor and remove the bolts.
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Sunday, November 4th, 2007 AT 8:03 AM

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