coolant loss - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 3 (permalink) Old 05-13-2006, 04:43 AM Thread Starter
 
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coolant loss

Im not really sure if my head gasket is gone. A diesel machinac told me it may be my egr cooler. I dont have a lose of power but a lose of collant. How do I know what it is.

please help. Truck sitting in driveway and need to go fast

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post #2 of 3 (permalink) Old 05-13-2006, 05:43 AM
 
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have your machanic pressure up the coolant system. take the egr valve out and look & listen for the leak. i have had to go as high as 20 psi to hear it leaking. if it is the egr? does the truck smoke white hot or cold?? coolant leaking into the egr track will be easy to see. your machanic should have a combustion gas tester? this will tell you if it is a head gasket. do you or your machanic have a way to put a vacume on the coolant system,if so do it, pull the intake tube off where it goes into the elbo of the intake. put your hand over the hole on the elbo,pull vacume now take your hand off did the vacume go to zero if yes its your egr, if not you need to do more tests and it may be a head gasket?
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post #3 of 3 (permalink) Old 05-13-2006, 06:49 AM
 
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Problem with the combustion gas tester is that every single 6.0L will pump some combustion into the coolant on startup. So it will turn slightly green. But if it is super green you know you have combustion gas there. I posted the TSB for the coolant loss in the tech forum. If you disconnect the EGR valve with the engine off and run the truck and the coolant loss is less, then it would lead you more toward the cooler.
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