My first duramax isn't going well. I have had to add coolant every time I drive it. Lost gallon in 400 miles. Truck has 191K miles 2003.
First off no coolant leaking on the ground or coming out the overflow vent tube.
When it cools the Upper hose has been collapsed some. System holds vacume even with new rad cap.
system will hold 14 psi with gauge for an hour. Cant find leak anywhere.
Then I noticed water droplets in the oil fill and then I pulled pcv hose and its almost clogged with a gooy substance. So some must be getting into the crankcase.
Now the oil deffently hasn't gained a gallon so I think most is being burned off. The upper hose never is rock hard, no bubbles in the overflow tank. Also checked for exhaust gases in the coolant. was none. also oil look good.
Ive spent days reading on this. But still cant make a decision. Can the injector cups [COLOR=blue !important][COLOR=blue !important]leak[/COLOR][/COLOR] coolant into the top of the head? where else can the coolant be going.
Love this site by the way.
First off no coolant leaking on the ground or coming out the overflow vent tube.
When it cools the Upper hose has been collapsed some. System holds vacume even with new rad cap.
system will hold 14 psi with gauge for an hour. Cant find leak anywhere.
Then I noticed water droplets in the oil fill and then I pulled pcv hose and its almost clogged with a gooy substance. So some must be getting into the crankcase.
Now the oil deffently hasn't gained a gallon so I think most is being burned off. The upper hose never is rock hard, no bubbles in the overflow tank. Also checked for exhaust gases in the coolant. was none. also oil look good.
Ive spent days reading on this. But still cant make a decision. Can the injector cups [COLOR=blue !important][COLOR=blue !important]leak[/COLOR][/COLOR] coolant into the top of the head? where else can the coolant be going.
Love this site by the way.