I bought my Hummer use with 43k miles on it. I quickly noticed a slow decrease of coolant in the overflow tank. The GMC dealer replaced the water pump saying it was leaking. The very slow leak continued and multiple oil analysis showed markers of coolant in the engine oil. I loose about.25"+ from the overflow tank every 2k miles.
The dealer can't find the leak and refuses to dig further than a pressure test and leak dye test. How can I find the source of such a slow leak without tearing apart the engine? Where can the leak be besides a cracked head or head gasket?
have the same problem?
Thursday, January 9th, 2014 AT 7:48 PM