Loud ticking noise coming from the top of the engine?

Tiny
C0UNTRYB0Y
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 2.4L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 118,000 MILES
First four cylinders are 90 lbs, the last two are 150 lbs compression. There is a loud ticking sound coming from the front top of engine, it isn't misfiring, compression is leaking down though into the crankcase, the engine sat for a few years inside of warehouse, it has 118,000 miles on it. When I first started it there was no noise, after it ran a couple of minutes it started ticking, knocking? It doesn't use oil or smoke any. What could it be?
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Tuesday, March 9th, 2021 AT 8:48 PM

2 Replies

Tiny
I-SMOGEM
  • EXPERT
Hey Country,

Sorry to tell this, but that indicates bad piston rings and/or worn engine cylinder walls. The only way to correct that specific engine is to do an engine rebuild. I'm sure that's not what ya wanted to hear.
We can give you further information on an engine rebuild if you want to endeavor it.

Glenn
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Wednesday, March 10th, 2021 AT 11:47 AM (Merged)
Tiny
KASEKENNY
  • EXPERT
Can you get a recording of this noise? More then likely the engine need to be replace/rebuilt as stated but hearing the noise will help confirm this not to mention help others hear the noise if they have a similar noise.

I attached the info below on how to replace the engine in case you or others need that as well.

Thanks
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Wednesday, March 10th, 2021 AT 4:42 PM

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