Ok im stumped - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**scotts62** · 10-20-2012, 05:54 PM

Have a friend with an '02 chevy 3/4 ton 6.0 CNG/Gas and it is having a overheating problem on long distance hauls. He changed the water pump, thermostat and flushed the system a couple times and it still does it. He brought it over for me to look at and i went and drove about 5 miles down the hwy and it runs great and temp is right at 200 until you hammer down on it and it jumps to 220 and if you do it again approx 80 mph it slowly climbs towards 260. It didnt seem like it was getting warm to me at first and i replaced the sensor and washed through the coils on the radiator and condenser and it still does it.. head gasket maybe?? Any ideas??

Thanks

10-20-2012, 05:54 PM	#1
scotts62 One day... Join Date: Apr 2008 Location: Tuttle, Ok Posts: 9,243	Ok im stumped Have a friend with an '02 chevy 3/4 ton 6.0 CNG/Gas and it is having a overheating problem on long distance hauls. He changed the water pump, thermostat and flushed the system a couple times and it still does it. He brought it over for me to look at and i went and drove about 5 miles down the hwy and it runs great and temp is right at 200 until you hammer down on it and it jumps to 220 and if you do it again approx 80 mph it slowly climbs towards 260. It didnt seem like it was getting warm to me at first and i replaced the sensor and washed through the coils on the radiator and condenser and it still does it.. head gasket maybe?? Any ideas?? Thanks __________________ Scott 93 crew cab build Project 62



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