Loosing coolant

Well, I would document complaint to last shop to tear it down. With only a half gallon a week; keep it full and close check till it shows itself. Consider the posibility it may have been partly air locked from last tear down?

 

have you done a oil sample? if it checks out ok then i would say a crack in the head if they reused the original or reman or they dont have liner protrution up where it should be (cat has specs that are usally to low) or it wasn't checked also check the air compressor, see if your getting any water in the air tanks. i would say with the second head gasket and head they are not checking the liner protrution. went through the samething on my last truck. they screwed around with me until my warrenty ran out.

 

yeah just did my mxs acert 10000 miles ago. did the rebuild myself. what a pain in the backside. had some little issues but with the help of mr haney got it figured out. if i remember right the liner protrution from 1 to 6 can be no more than .004 differance and i think .002 from one next to the other. dont quote me my memory isnt that good. anything below .003 isnt good. if they did a opt there should be a record of what protrution was at when they checked it. if they checked it!! also hope they checked the deck of block also good luck.

 

Possible being pushed out under pressure during driving too .But wont leak when idle .

 

If all it's loosing is a half gallon, it's a small leak for as much as you drive. I think me only is correct. Possibly going out the stack if you have no visual signs. My guess is head or head gasket with a hairline crack.

I know they do smoke test on cars. Can't they do it on a diesel engine?

 

if it was a head again you would loose all your water but what i am here is there is not leak so the head it not completely blown if you run it in a stressful scenerio like the mountains for a few days with a heavy load it should completely blow it and it should warranty