over heating
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Freshman User
Joined: May 2010
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My father-in-law the previous owner said it done the something to him and it was a crack in the head. He replaced the head and fixed it. Could it be the same thing again? Looks like I will be needing a head gasket set.
Senior User
Joined: Dec 2009
Posts: 374
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From: Portsmouth, Va
Could it be? Sure could. But cracks don't form for the hell of it if I'm not mistaken. How long has the engine had the new head? Where'd that head come from?
How many times has coolant boiled over exactly? Did you ever hear bubbling in the radiator hose? As in the coolant boiling inside the hose?
Does your radiator cap say what pressure it's rated for?
I'd try and diagnose further before tearing the engine apart, unless you have no more options.
As for the gauges, the computer uses the ECT sensor. The dash uses the Coolant Temp sending unit. So no, won't harm the computer.
How many times has coolant boiled over exactly? Did you ever hear bubbling in the radiator hose? As in the coolant boiling inside the hose?
Does your radiator cap say what pressure it's rated for?
I'd try and diagnose further before tearing the engine apart, unless you have no more options.
As for the gauges, the computer uses the ECT sensor. The dash uses the Coolant Temp sending unit. So no, won't harm the computer.
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Freshman User
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The truck can't have more than six thousand miles since the head problem. The head probably came for a junk yard knowing my father-in-law, but would have been redone by a reputable place. It has only boiled over once on me because I'm keeping a eye on the temp now. The cap was rated for 13 lbs and the new one that the parts store game me is rated the same. I can't remember it boiling in the hose.
Thanks for helping me it means a lot.
Thanks for helping me it means a lot.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
I ask about the lower hose because if the water pump is spinning fast enough it can suck the hose flat and you will overheat even on the highway with a 75 mph breeze going through the radiator.
This is looking more and more like a cracked head to me.
If it's only open while hot you might miss it with a pressure test.
But there are testing kits to determine combustion byproducts in the coolant.
This is looking more and more like a cracked head to me.
If it's only open while hot you might miss it with a pressure test.
But there are testing kits to determine combustion byproducts in the coolant.
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Freshman User
Joined: May 2010
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swapped out the one core rad for a 2 core rad and it seems to be fixed. I tested for combustion byproducts in the coolant and it came back genitive. I will still be putting a new exhaust on it, but she is a running cool now. The larger rad bolted right up but there was no room to spare between the fan and it. I also need a new fan shroud, the old one wont fit any more.
Thanks for all the help that everyone gave me.
Thanks for all the help that everyone gave me.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
I'm glad to hear that the larger radiator fits and that you didn't have an engine problem.
Maybe you can use a different fan clutch to gain some clearance?
From all I've heard these inline sixes are almost bullet proof.
I hope it gives you good service!
Maybe you can use a different fan clutch to gain some clearance?
From all I've heard these inline sixes are almost bullet proof.
I hope it gives you good service!
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The fan isn't in any danger of hitting the rad. It's just real close to it. I don't think I'll need the shroud on. Put it through every test as far as running up steep hills lugging the motor. Done lots of freeway driving, and letting it set in the drive way. The temps have been in 90's and all the testing was done with the ac on. Never got over 190.
My first ford had the 300 six in it. It was an 85 Ecoline van. Gave that thing hell as a teenager. I didn't do any up keep. No oil changes or tune ups whats so ever. Ever seen a rad blow up. It over heated and a friend lit a lighter over the fill spout and boom. Burnt his eye brows right off, and knocked off his hat that we never found. Put a new rad in and it lasted for another 3 years till the trans went bad. Motor still purred like a kitten when I parked it. I miss the old ******** wagging.
My first ford had the 300 six in it. It was an 85 Ecoline van. Gave that thing hell as a teenager. I didn't do any up keep. No oil changes or tune ups whats so ever. Ever seen a rad blow up. It over heated and a friend lit a lighter over the fill spout and boom. Burnt his eye brows right off, and knocked off his hat that we never found. Put a new rad in and it lasted for another 3 years till the trans went bad. Motor still purred like a kitten when I parked it. I miss the old ******** wagging.
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