Wasn’t there a period where the “Heavy Duty Truck Design” V10 thermostats were defective from the factory?
Magnum V8s had a stamped steel coolant pump impellor design that would go bad if the antifreeze got old or had the wrong chemistry, due to cavitation.
There was a TSB on this.
Did V10 coolant pumps also have stamped steel pump impellors?
The early V10 had plastic t-stat housings that’d crack/leak. They were replaced by an aluminum unit. Both this housing as well as the timing cover we’re prone to corroding if cooling sys maintenance not followed.
