911 coolant help

[DuraGoode]

i have a buddy with a 05 lly it has 250k on it and for the past 15k he has had to put water in the coolant tank every couple days and now the tank has black stuff in it. cant figure out what the prob is. the truck can sit for days and have no leak and still runs great. Help..

 

[JoshH]

Sounds like maybe a head gasket.

 

[DuraGoode]

coolant

about 50k he was running it hard and the coolant line on the turbo blew so he changed it and thats when it all started and now when he runs it hard it blows water out the over flow.

 

[paint94979]

about 50k he was running it hard and the coolant line on the turbo blew so he changed it and thats when it all started and now when he runs it hard it blows water out the over flow.

blown headgasket

 

[DuraGoode]

coolant

but shouldnt it smell out the exhaust if it was a headgasket and there is black stuff in the coolant tank. and the oil is good no water in it.

 

[MWDHAND]

Sounds like maybe a head gasket.

:thumb:

 

[JoshH]

Not necessarily a smell from the exhaust. The coolant rarely mixes with the oil when a head gasket blows on a Duramax. If it is a head gasket, the black stuff is soot from the combustion gasses getting into the cooling system. Typically when a head gasket goes the coolant system will be overly pressurized. After he has run the truck have him check the upper radiator hose. It should be firm, but not hard. If the gasket is blown, you usually won't be able to compress it any when you squeeze it.

 

[66impala]

turbo seal went out. i had that happen to my rig. at 100k after i got it fixed then the oil seal on the turbo started sucking oil out of the block. was going threw about 3 qt. every 1000 miles. it also could be a headgasket. tell him to check his oil in his crank case.

 

[Dieselmax]

I had the same symptoms when my headgaskets went