ISM Overheating EGR???

[Rawze]

not sure about yours, however ...

Most of the time on the ISX... if one overheats all the time even after a new thermostat, it is usually only a few things...

== (most common) The brass ring in the bottom of the thermostat housing was not replaced and is bad.. or was installed and got damaged.

== The radiator, (or A/C or CAC element) is impacted and cannot breathe properly, has never been properly cleaned out.

== The fan clutch is slipping and not turning the fan hard enough to pull air thru the radiator properly any more.

== Engine fan itself is bad.. or shroud is not installed properly.. or the fan itself was installed backwards after some service work was done.

== The water pump impeller is damaged or (incorrect model after a replacement) and not pushing enough coolant thru the system.

=== The upper radiator hose going from the radiator is collapsing under load for one or more various reasons. I.E.> Spring is missing after replacement, or collapsing due to it getting old,. etc.

== Its an RV and the electric fans have problems ... or some moron turned up the engine power, or some other thing and the engine compartment cannot handle the air flow properly for various reasons.


-- take your pick.

The EGR getting stuck will not cause the whole engine to overheat like that,.. no, but will cause other issues.