Quote:
Originally Posted by ktl4974
99 Blazer, 4.3, 4wd
I just finished replacing the head gaskets/passenger head last week and found a leak in the radiator today so had to replace that as well. I am wondering if it is normal with a new rad and having a "clean" system that the lower hose stays cool? All the other hoses are hot, am getting heat, running normal temps and no other cooling issues noticed. Also at startup I am getting a squeal seemingly from the water pump (replaced this January) that goes away most of the time after it warms up. Any suggestions?
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Is heater working good?
Any coolant leaks.
Is the running tempt holding around 195 degrees?
It is normal for lower rad to be cooler.
Hot coolant comes into rad from top hose and cools as it goes threw rad and should be cooler coming out at lower hose.
ON water pump noise make sure pump is not lose or leaking.
Then check belt and belt tensioner and also alternator bearings.