Posted 11/4/2026 14:57 (#11794351 - in reply to #11794180) Subject: RE: Cummins ISX problem?
SE MN
Probably head gasket. Cylinder pressure during combustion is over 1000 psi, so it pushes past a weak head gasket. Coolant system pressure is less than 20 psi, so it doesn't push back in when you pressurize the coolant.
Cummins ISX problem?
