Paccar coolant issue

There is a service kit to replace the air compressor head that comes with a new gasket. The gasket itself is not serviced separately. Make sure you get the plastic coolant supply pipes and fittings to the head as they are fragile when servicing. The head can be replaced in chassis without compressor removal.

 

They also do or at least did sell a ln OEM brass upgrade kit which is much better then the plastic ones. The plastic ones get brittle over time and can crack which happened to mine once just driving due to age and another when the compressor gasket went bad. If its an option use that one instead of the plastic ones. But i am unsure if that is an option on the newer edition motors or was just a EPA13 edition specific one.