Ls1 overheating
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Joined: May 2026
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Ls1 overheating Hey guys first time posting, I need of some help
I’ve got a 2000 gu patrol with an ls1 turbo
i built the Ute a few years back been fixing little things up here and there it was running great for a year or so. Coolent got low one day so I topped it up and after that it kept getting hot I done a co2 test and it come back positive
I removed the heads couldn’t really see where the head gasket had blown
I also found bearings and rings were stuffed from low oil pressure so I replaced all bearings, rings lifters etc
checked block and heads too see if they were warped with a straight edge everything looked okay
Fitted new head gaskets new bolts and torqued correctly
also changed the radiator and water pump with a thermostat
started it today but is still getting hot after a few hours of trying to bleed the cooling system
I done a co2 test again and it was positive again
what should I check now
I was going to separate the turbo cooling side incase it’s leaking computation into the cooling side of the turbo
any help or suggestions would be much appreciated
I’ve got a 2000 gu patrol with an ls1 turbo
i built the Ute a few years back been fixing little things up here and there it was running great for a year or so. Coolent got low one day so I topped it up and after that it kept getting hot I done a co2 test and it come back positive
I removed the heads couldn’t really see where the head gasket had blown
I also found bearings and rings were stuffed from low oil pressure so I replaced all bearings, rings lifters etc
checked block and heads too see if they were warped with a straight edge everything looked okay
Fitted new head gaskets new bolts and torqued correctly
also changed the radiator and water pump with a thermostat
started it today but is still getting hot after a few hours of trying to bleed the cooling system
I done a co2 test again and it was positive again
what should I check now
I was going to separate the turbo cooling side incase it’s leaking computation into the cooling side of the turbo
any help or suggestions would be much appreciated
Last edited by Brocase; May 2, 2026 at 01:45 AM.
