Time for my first Cummins Headgasket

[Nates1999]

What coolant temps are you running?

 

How about boost and EGT's?

Coolant temps stayed pretty solid near the middle of my gauge.  Never pushed high.

Egts never got worrisome.  Stayed under 1100 the whole trip.

I never pushed boost over 25psi

Edited July 21, 2015 by Nates1999

[Nates1999]

Are the 24V gaskets not MLS?

 

Do you think it is combustion pressure pushing on the coolant?

 

Not sure about MLS.

 

Yes I think I have combustion pressure in the coolant.

[Nates1999]

Sounds like the cap to me. If there is anything over 12 or 14psi I can't remember which our cap is, it should pour into the overflow not out any of the boots. Where did you purchase your cap from?

As for clamps you need the constant tension spring clamps. It'll keep those hoses tight through the expansion and contraction.

You really need to test and see if you are getting pressure into the coolant system with a gauge. If the pressures are that high it could blow out freeze plugs and that's another story.

I believe our caps are set at 16psi.  I replaced my old leaking cap with a factory dodge cap (which still leaked a little), and then a NAPA cap, which didn't leak at all before I changed the gasket.

 

I never had any coolant seepage at the hoses before the gasket

 

Hoses are rock hard most of the time now. Problem seems most noticeable right after cold startup.  I think it seals itself up when it gets to temp.

[AH64ID]

What happens when you start it cold with the cap off?

[Nates1999]

Well.  I put on a new cap (again) and new clamps (used constant torque types) and it appears that the issue is gone... Yay!  Clamps I was originally sold were way too big for the hoses.  They "wormed" down nice and tight, but the new ones are MUCH higher quality.  Hopefully all good now.