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Engine knocking

Tiny
PAMPATX
  • MEMBER
  • 2007 CHRYSLER 300
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 33,000 MILES
The mechanics have replaced both right and left side rockers and lifters. I still have a knock that sounds like it is coming from the top of the engine. They do not know what the knock is. It increases with the engine speed. It also sounds much like a lifter ticking, but with a little deeper tone. The engine is a 3.5 v6. Any Ideas?
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Thursday, December 11th, 2008 AT 5:30 PM

3 Replies

Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
Hi, could be a wrist pin could be a cracked piston. Could be a worn cam. Could be a timing problem loose tension-er's or guides. Just a few thoughts. Thanks. Billymac
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Saturday, January 24th, 2009 AT 10:41 AM
Tiny
ENZODEN
  • MEMBER
  • 2 POSTS
I am having the same problem. 2003 Town and Country 3.38. I decided since I needed to open the engine to simply do a full rebuild. Found oil starved and slipped connecting rod bearings and excessive carbon build up in number three piston. Nothing else major, lift rods were a little oil starved as well but undamaged. Did all the cleaning and replacing needed, put it back in the van and it fired right up, but the knock is still there!
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Sunday, March 13th, 2016 AT 3:32 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Yes, this is caused by a seized wrist pin. I would remove the pistons and check each one. I just did this problem about two month ago.
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Wednesday, June 13th, 2018 AT 3:23 PM

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