loosing coolant

[Rawze]

A gallon a day is a lot.

* Replace the radiator cap/pressure relief cap with new one(s)!.

* Pressurize it up to 20-psi and let it sit overnight with the pipe off the back side of the EGR cooler open. Also take loose (at both ends) the pipe the doser injector is attached to and see if it is not oozing out of the Doser injector, and/or the turbo. See if anything is wet the next morning. Also look for leaks on the ground the next morning.

* Check your APU for leaks.

* check tranny for coolant intrusion,.. a gallon a day would make it fill up and have too high oil level.

* Remove the crank case filter housing and look for greenish/slimy residue in the underside of the cover.

* Check the air tanks for excess moisture.

* Crank it up with the Doser pipe still loose and see if the Doser injector is getting wet/damp while it idles.

* when you crank it, it should not have a first-rollover hesitation in the engine. .. If it does,.. It is getting into a cylinder and trying to hydra-lock it.


* Put a pressure test kit on it with an extension hose so you can see the pressure and take it for a spin under heavy torque load. -- See if the coolant system is rapidly building pressure only under load.