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Discussion Starter · #1 ·
My 56' Nomad with a 283 and stock radiator overheats in stop-and-go traffic only. In regular driving it's fine. I've replaced the water pump and replaced the fan with a new 6 blade unit. The only thing left is the radiator. It doesn't leak and the coolant looked clean when I drained it. Somebody told me I should have it "boiled out". How does that work? Or should I just try some radiator flush? If so which brand?
 

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Do you have a fan shroud? These cars did not come with one and were always overheating in traffic. The blade does not pull much air without a shroud. When you are going over 30 it's no problem. I use an electric 16 inch fan as a pusher in front of my radiator and do not use a water pump blade. I never have an overheating problem even standing still. About 200 degress on a 95 degree day. Your radiator is not the problem or the car would overheat even when driving over 30.
 

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I have a 283 with an original radiator that was re-cored with a 3 row or 4 row, I am just not sure but it looks like the original. It stays well below midpoint of the orig temp gauge in 90 deg weather and traffic. I just took the car up past 7200 feet elevation and the temp went just barley over 1/2. No shroud.
 

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I once ran a modified 283 for over a year with no fan at all and never had an overheating problem. Of course the car and radiator were only three years old at the time. I believe your problem is indeed the radiator. A compentent radiator shop can use your top and bottom tanks and put in an entire new core. It also wouldn't hurt to flush out the engine block.
 

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Send the radiator out to a specialist. Providing the fins are OK ,they will remove the tanks and rod clean the core. Blocked tubes in the core will greatly reduce efficiency. The rad guy will be able to tell you how blocked it was after he cleans it out.
Regards Tommo
 

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Discussion Starter · #8 ·
What size thermostat are you running.
What problems if any did you have previously.
I put in a 160 degree thermostat when I replaced the water pump. There was no thermostat up to that point. When I had the timing set right, that helped,
it took longer to get hot. And I do have a shroud, like I said the only thing left is the radiator. Thanks for the info guys, I'll check out what it cost to get the core cleaned or just get a new one.
 
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