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2000 Chrysler Intrepid Sounds like a sticking valve

Tiny
VCHAPIN
  • MEMBER
  • 2000 CHRYSLER INTREPID
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 154,000 MILES
Hi, I have my car sitting stored for the winter and I start it every now and then and then drive it around the block. This time I noticed a loud knocking sound coming from the middle of the engine. It somewhat disappears at high revs, but still somewhat noticable. When the car idle goes back to normal, it reappears after about 1 minute. Do you know what it is? As well there is a brown foam around the oil filler cap.

Vic.
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Sunday, March 1st, 2009 AT 12:46 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
When you check the oil, is there a creamy mixture on the dipstick?

Let me know.
Joe
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Monday, March 16th, 2009 AT 10:28 PM
Tiny
VCHAPIN
  • MEMBER
  • 4 POSTS
No there is no creamy mixture on the dipstick, it is just around the filler cap.
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Thursday, March 19th, 2009 AT 9:48 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi:
If it is only the cap, chances are the PCV valve needs replaced because it isn't taking the moisture from the engine.

As far as the knock, it could be a rod or main bearing. Without hearing it, I can't tell. Most mechanics will be able to tell you quickly.

Let me know what you find.

Joe
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Thursday, March 19th, 2009 AT 12:22 PM
Tiny
VCHAPIN
  • MEMBER
  • 4 POSTS
Thanks Joe really appreciate it. I will change out the PVC and go from there.

Vic.
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Thursday, March 19th, 2009 AT 12:44 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Vic,
When you change it, make sure the hose to it is clean and not plugged too. I doubt this has anything to do the noise. Have you had it looked at?
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Thursday, March 19th, 2009 AT 1:26 PM
Tiny
VCHAPIN
  • MEMBER
  • 4 POSTS
Hi, had the PVC changed and it now looks good. I had the noise looked at by a mechanic and he said it was the timing chain adjuster making the noise. He replaced it and the noise went away. He indicated that because it was oil pressured that I should be changing my oil more often as a cause of this happening is dirt and grunge getting in behind the adjuster.

Thanks again.
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Sunday, March 29th, 2009 AT 10:24 AM

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