460 running hot
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Junior User
Joined: Aug 2002
Posts: 97
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From: so cal
460 running hot
Hey guys, I have rad thru the topics to try and find a probelm like the one i have no luck. 1977 f-250, 460, automatic, factory air (134a). Been going to Lake Havasu for over 12 yrs. Last year the truck started to run hot so i started to try fix the p[robelm before this years trip. repaled the rad with a 4 core, got rid of the fan clutch, used a fan clutch eliminator kit,(now runs full time), new water pump and a thermostat (180 degree). but this puppy will still overheat. In the desert the needle goes past the middle when i climb hills it goes to the L on the NORMAL guage. If i leave it idling will climb to the L. I just dont know what to do anymore. Please if anybody can steer me into the right direction i would really appreciate it.
leo
leo
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Junior User
Joined: Aug 2002
Posts: 97
Likes: 0
From: so cal
Hey Brad, yes i do have the original shroud in place. I will go and buy a new sender, but i know that it is overheating by the some antifreeze that is boiling over to the street. You know that this is very frustrating cause i used to be able to run anywhere in this truck without having to worry about things like this. i have had this bad boy since 1984.
thank you
leov5
thank you
leov5
Tuned
Joined: May 2003
Posts: 345
Likes: 4
From: Southern IL
A recovery unit should stop the overflowing onto the street problem. Also after my 78 doing the same thing over and over I discovered that on these models you are only supposed to fill them to about 1" below the cap or they will spit up on you. One critical element of engine temp. is your timeing. If it's off, maybe chain stretch, it can cause heat problems. I have also found that after serviceing an automatic transmission in need my temp. gauge runs lower. How long has it been since you serviced or had your transmission serviced?
Senior User
Joined: Dec 2002
Posts: 473
Likes: 0
From: SW Florida
Check Block
My 460 in my F350 had the same problem, turned out the block was pretty scaled up inside, had to pull the freeze plugs out and do a good rinse of the block. Not fun. Before you do that, check the lower hose, make sure it's not closing when the motor revs up - if the internal spring has rusted away, the hose will collapse at higher rpms, cutting the water flow off. Also, possible that the impeller on the water pump gets rusty & gets holes in it, then doesn't push water like it should. My motor obviously had been neglected & run with rusty water before I got it.
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