Cooling Off the Pre-heater and After-Glow
The Isuzu/GMC Forward Tiltmaster truck (otherwise known as the NPR/W4/4000) with a diesel engine and the JF506E transmission has a setup for recovering engine coolant that has been known to cause hard starting or a no-start condition. And it always seems to become a problem after the transmission needs repair; at least, that is what the customer says until you finally figure out what is the real cause of the problem.
