2002 Chevy Suburban Top End Knock

Tiny
GUSTHEICEMAN
  • MEMBER
  • 2002 CHEVROLET SUBURBAN
Engine Mechanical problem
2002 Chevy Suburban V8 Four Wheel Drive Automatic 53K miles

I’ve owned a 2002 Suburban LT 5.3L for a year now, its done 53,000 miles. Every morning at start up there’s a top end knock which gradually fades away after about 30 seconds, if I didn’t know better I say it was an empty hydraulic lifter which pumps up. However a pal tells me he heard it’s something to do with piston knock. The question is: Should I be worried and get something done about it?
Best Regards
Gus UK
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Tuesday, November 25th, 2008 AT 1:35 AM

1 Reply

Tiny
MHPAUTOS
  • EXPERT
Hi there,

Piston knock wont fade after start up, if anything it will get louder, if it is more of a tick, it will be a lifter, if it is a deep knock that fades away, it may be an oil filter that is draining back over night and it is a bit of bearing knock while the oil presser builds up, have a listen and let me know which you feel it is, then I can advise further.

Mark (mhpautos)
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Tuesday, November 25th, 2008 AT 2:56 AM

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