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85 Mallard P30 454 Overheat Success Chris 9-16-16  
85 Mallard P30 454 Overheat Success, I wanted to share my overheating experience with you.

Rre RV random day with a friend we ended up at Stelmach Automotive and radiator in Prescott, AZ. He explained he can fix holes/leaks, replace new core with old sides, pull a tank off to clean out the tubes (rod it out) and build a custom.

Uncle died in Texas with Grandma's RV, I flew out and drove home to AZ. Overheated twice EMPTY.

My dad had it for ten years, put a Chevy crate motor 15k ago and said it always ran hot. Trip planned for two months away and decide to start investigating.

Coolant fresh, new fan clutch didn't help, new t stat no help and tried a new secondary temp gauge that was the same as the old.

Picked up a cap, pulled off the 90 adapter to connect the horizontal radiator outlet to the vertical cap holder, looked in side the radiator and each tube was clogged up super bad. Decided to pull it out and have it rod it for less the $80. The new ones are thin aluminium core at $300 to $400 and I know the original one fits.

What a pain to get that thing out. Radiator shop guy said the tubes connecting each tank were almost competently plugged, took a lot to clear them out (extra $20)

Changed belts, water pump, radiator hoses, trans oil cooler lines, heater hoses oil change, trans flush and air cleaner. Installed the radiator, new fan clutch was trash and bought another.

Runs like a champ with no more problems. 190 normal and 210 under a load / or climbing steep hills full loaded flat towing a jeep. The fan clutch kicks in and maintains proper temp at 5 mph to steep climbs.
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