Engine knock

Tiny
ENZODEN
  • MEMBER
  • 2003 CHRYSLER TOWN AND COUNTRY
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
A friend of mine came to me with a very loud knock coming form the top engine around the 3rd cylinder (with engine above idle speed only). All the research I did told me it was a blown connecting rod. I did a full rebuild and found oil starved and slipped brngs. No other major damage. Crank shaft was fine, pistons were not cracked/broken (one piston was a little stiff), cam and bearngs were fine, some lifting rods were dry, but no damage. Cleaned and replaced everything as per a normal rebuild. I got the engine back together and installed in the van, fired right up and wouldn't you know the knock was still there. PLEASE HELP
Monday, March 14th, 2016 AT 2:16 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If the bearing spun the crank should been replaced as well as the rod depending on how damaged the rod is/was, also oil holes in block should have been checked for debris as there was probably debris in it.
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Monday, March 14th, 2016 AT 4:10 PM

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