delay18 Posted February 4, 2009 Report Share Posted February 4, 2009 Well as the title says I just noticed today what sounds to be a lifter noise. It is a ticking noise on cold start up in the morning. It is there for a few seconds and as soon as the oil pressure comes up its gone. Is this something serious I should worry about, and how do I fix it? Thanks. Rob Quote Link to comment Share on other sites More sharing options...
kcsilveradoss Posted February 4, 2009 Report Share Posted February 4, 2009 Well as the title says I just noticed today what sounds to be a lifter noise. It is a ticking noise on cold start up in the morning. It is there for a few seconds and as soon as the oil pressure comes up its gone. Is this something serious I should worry about, and how do I fix it? Thanks. Rob skirtless pistons=normal noise at startup. if it doesnt go away, different story. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 4, 2009 Report Share Posted February 4, 2009 Don't worry about it, some valve train noise especially when cold is normal with the Gen-III motors......most of them have it. Quote Link to comment Share on other sites More sharing options...
delay18 Posted February 4, 2009 Author Report Share Posted February 4, 2009 Ok thanks guys. I knew that there was a problem with the 4.2L I-6 that was in the TBs Bravadas etc. We had one in the shop and the lifters would collapse overnight cause alot of lifter noise on cold starts. We replaced all lifters under warranty then it was back two weeks later. There was a TSB about it. Coolant getting in the oil and collapsing the lifters. Also leaving a lot of build up making it appears as though the oil was not changed on a reg basis. We had to send out the head and check for cracks, no cracks found, no head gasket failure, etc. So TSB says its an internal crack in the block and to replace the engine. So after that I, and hearing this I wanted to make sure nothing like that was happening with these engines. Quote Link to comment Share on other sites More sharing options...
sprayed99 Posted February 7, 2009 Report Share Posted February 7, 2009 Ok thanks guys. I knew that there was a problem with the 4.2L I-6 that was in the TBs Bravadas etc. We had one in the shop and the lifters would collapse overnight cause alot of lifter noise on cold starts. We replaced all lifters under warranty then it was back two weeks later. There was a TSB about it. Coolant getting in the oil and collapsing the lifters. Also leaving a lot of build up making it appears as though the oil was not changed on a reg basis. We had to send out the head and check for cracks, no cracks found, no head gasket failure, etc. So TSB says its an internal crack in the block and to replace the engine. So after that I, and hearing this I wanted to make sure nothing like that was happening with these engines. also the oil pump o-ring can cause this tick when started cold, but I think they fixed that in 01 or 02 which is before the SSS. I had to replace my lifters in my old 04 JG truck, ut only because the noise was getting worse and I had the heads off getting ported anyways. Quote Link to comment Share on other sites More sharing options...
JSTAL Posted February 7, 2009 Report Share Posted February 7, 2009 on thing i learn from danny, the above poster, is use a mobile one oil filter with the anti drainback valve. This reduced alot of cold start noise form the upper rotating assembly Quote Link to comment Share on other sites More sharing options...
Badkarma Posted February 7, 2009 Report Share Posted February 7, 2009 +1 For the anti drain back valve. K&N oil filters have them too. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 7, 2009 Report Share Posted February 7, 2009 +1 For the anti drain back valve. K&N oil filters have them too. +1 for K&N........ Quote Link to comment Share on other sites More sharing options...
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