460 overheating problems
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01 POWERSTROKE
Joined: Jun 2010
Posts: 48
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From: Clearfield, Utah
460 overheating problems
i just did a 460 swap from a 360 in my 67 f250 and im super confused my motor will run about 160 180 but my radiator will start smoking and just shooting out the overflow super hot!!!!!!!!!!! im lost please help my thermostat is 180 i have a 13lb cap on it im lost!!!!!!!! THANKS
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01 POWERSTROKE
Joined: Jun 2010
Posts: 48
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From: Clearfield, Utah
thanks everyone i replaced thermostat and same thing its a brand new build yesterday was the first time i started it iv talked to some people and they say my 2 core radiator is to small?????????
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Posting Guru
Joined: Nov 2007
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From: Montgomery, IL
go get a 4 core radiator.
Postmaster
Joined: Oct 2008
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From: Renton, WA
3 things, yes make sure there is no air under your thermostat, I do this by drilling a 1/8th hole in all my thermostats. Second, watch the coolant level in the radiator and rev the engine, if the pump is working usually the level will drop for a second. Third, I'm sorry to say but it really sounds like a bad/blown head gasket. The combustion pressure leaking into the coolant is flash boiling the coolant and pressurizing the system with combustion gasses which is why it is blowing out the raidiator so much and so hot. You can easily check for this with a chemical block tester, it tests for combustion gasses in the radiator, and is pretty darn cheep and easy for what it does.
Good luck, crossing my fingers.
Ohh ya, not that getting a 4 core radiator isn't a good thing or anything, you should get one anyway, but I doubt it's your problem, if it was your temp gauge(assumeing it works well) would rise.
Good luck, crossing my fingers.
Ohh ya, not that getting a 4 core radiator isn't a good thing or anything, you should get one anyway, but I doubt it's your problem, if it was your temp gauge(assumeing it works well) would rise.
Posting Guru
Joined: Nov 2007
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From: Montgomery, IL
Third, I'm sorry to say but it really sounds like a bad/blown head gasket. The combustion pressure leaking into the coolant is flash boiling the coolant and pressurizing the system with combustion gasses which is why it is blowing out the radiator so much and so hot.
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