Robinhood 1977 dodge 440 heats up on freeway
The longer you run it on the freeway the more it keeps gradually heating up. If you get off the fwy and slow down its ok. Or going down a hill cools it off quick. I have been through the cooling syste...
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I had a 440-3 (the truck, not car engine) in my '76 Coachman 25ft MoHo..
this engine used a larger thermostat than automotive.. I think I got it at NAPA.. also try add Redline water wetter.. and I had to renew the cuff wings around the radiator so all the air was flowed through the radiator and no blow out to the wheel wells. Also had a plywood floor at the bottom of the front frame rails so no air dove down under the radiator. freeflow mufflers and duals carried the exhaust heat away quicker.. used it all over Calif. w/o overheating problems except Palm Springs up Yucca valley grade in 103f day. Speed uses horsepower causing heat.. 10% increase speed uses 20% more power. Also when I replaced the water pump had to get a truck high volume one.(not stamped steel impellers but cast iron.
this engine used a larger thermostat than automotive.. I think I got it at NAPA.. also try add Redline water wetter.. and I had to renew the cuff wings around the radiator so all the air was flowed through the radiator and no blow out to the wheel wells. Also had a plywood floor at the bottom of the front frame rails so no air dove down under the radiator. freeflow mufflers and duals carried the exhaust heat away quicker.. used it all over Calif. w/o overheating problems except Palm Springs up Yucca valley grade in 103f day. Speed uses horsepower causing heat.. 10% increase speed uses 20% more power. Also when I replaced the water pump had to get a truck high volume one.(not stamped steel impellers but cast iron.
