View Single Post
Old 04-11-2013, 06:00 PM   #6
ksbrktracer
TNT-MOTORSPORTS
 
ksbrktracer's Avatar
 
Join Date: Mar 2008
Location: TULSA OKLAHOMA
Posts: 2,692
Re: 5.3 knocks when warmed up

My sons 04 5.3 had a noise you would have swore was a rod. Raced the motor up several times in a row and the noise went away, let it idle for a while and the noise came back , sounded like a rod or broken flexplate to me. Turned out the catalytic convertor had come apart inside , cut it open , gutted it and welded it back shut .......NOISE GONE ....... Swore we were gonna have to put an engine in it. Something to think about ....!
ksbrktracer is offline   Reply With Quote