…… Overheating
- Thread starter Marie
- Start date
hiwall
Has No Life - Lives on TB
First guess would be a bad thermostat, whether it is new or not. When the truck overheats, is the radiator hot? If not then it is likely the thermostat or water pump.
If the radiator is hot, does it help if you turn the interior heater up to its hottest setting? If that helps then it is likely a plugged radiator.
Or sometimes the big radiator hose will collapse from the suction of the water pump and that will stop water flow.
If the radiator is hot, does it help if you turn the interior heater up to its hottest setting? If that helps then it is likely a plugged radiator.
Or sometimes the big radiator hose will collapse from the suction of the water pump and that will stop water flow.
WanderLore
Veteran Member
no spillage on ground? I'm going with what Hiwall said.
Marie
Veteran Member
Yea the radiator is boiling over. Turning on the heater didn't help. I replaced the hoses, water pump and thermostat. Thinking that was the issue but it didn't help. That's why I'm thinking cracked head. The water is circulating in the radiator. I was gonna pull that off and have it checked in town later this week .but still thinking it's the head
Pressure test the cooling system, then cool it off and put the gauge on and start...see if the pressure comes up quick.
Just did the head gaskets on a '66 289 ford for this exact issue.
(china freight)
Just did the head gaskets on a '66 289 ford for this exact issue.
(china freight)
Marie
Veteran Member
Thanks. Think I can borrow that if not I'll order it.!!!Pressure test the cooling system, then cool it off and put the gauge on and start...see if the pressure comes up quick.
Just did the head gaskets on a '66 289 ford for this exact issue.
(china freight)
Not a difficult project, just a pain in the ass.
Local parts stores should have a loaner....for free.
You just have to leave a deposit equal to the price.
Probably not something you will need again.
Marie
Veteran Member
Ain't Local Napa a ol gals dream? Small town America
OldAndCrazy
Pureblood Forever
Recently heard of running CLR through a clogged system to free it up.
Marie
Veteran Member
I've changed 2 and yes it's gonna be a pain! The hardest part is keeping DH out of my way 
after the last repair job he ain't touching my truck. He didn't fasten the plug wires and they lay against the manifold. Poor guy 
but I'm gonna have one of the kids keep him busy and the other to help me with the lifting. Dang bum arm.
after the last repair job he ain't touching my truck. He didn't fasten the plug wires and they lay against the manifold. Poor guy but I'm gonna have one of the kids keep him busy and the other to help me with the lifting. Dang bum arm.
West
Senior
Not a difficult project, just a pain in the ass.
Falcon? Ranchero or alike?
Marie
Veteran Member
Thanks I'll grab a new cap when I borrow the guage tomorrow.
Marie
Veteran Member
Omg ,DUh! forgot about that thanks!
You might take a garden hose or pressure washer and wash the fins of the radiator out. Grass seed dirt and grime would stop air flow thru the radiator to cool.
Bubbles might appear in the coolant if head is cracked in a way that compression is pushing into the water system.
Starting from a cold engine does it go straight into over heating or does it cycle till it overheats.
Bubbles might appear in the coolant if head is cracked in a way that compression is pushing into the water system.
Starting from a cold engine does it go straight into over heating or does it cycle till it overheats.
Marie
Veteran Member
Thanks I'll check that!
No I have to drive it awhile which makes no sense. Well under load I guess. I don't have any codes on my obd. Checked that yesterday.
Marie
Veteran Member
Thanks I'll check that too!
If it's leaking compression into the coolant, you should probably see bubbles in the radiator.
The SB Ford above, I did water pump, fan clutch, t-stat & hoses first.
Did a cold pressure test, it started falling off immediately.
Put gauge on cold system, started...pressure came up within a minute or two.
Was seeing a few bubbles in the coolant and it had a lot of steam in the exhaust on a cool day.
That motor had been gone through. The bores still showed crosshatching and miked out to 0.030" over.
While poking around, I found a smidgee bit of leaking at the portside, rear corner.
On disassembly, that head bolt was not torqued like the others and it had been run hot too.
The SB Ford above, I did water pump, fan clutch, t-stat & hoses first.
Did a cold pressure test, it started falling off immediately.
Put gauge on cold system, started...pressure came up within a minute or two.
Was seeing a few bubbles in the coolant and it had a lot of steam in the exhaust on a cool day.
That motor had been gone through. The bores still showed crosshatching and miked out to 0.030" over.
While poking around, I found a smidgee bit of leaking at the portside, rear corner.
On disassembly, that head bolt was not torqued like the others and it had been run hot too.
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Marie
Veteran Member
Well I did the pressure test on Monday and it failed.
Youngun came on Tuesday to surprise me when I was at work and changed the head gasket. With DH's assistance to make him think he needed schooling. Sometimes those boys are good kids! Drove it home and said it's fine so he'll bring it back tomorrow before work.
Thanks guys!!!
Youngun came on Tuesday to surprise me when I was at work and changed the head gasket. With DH's assistance to make him think he needed schooling. Sometimes those boys are good kids! Drove it home and said it's fine so he'll bring it back tomorrow before work.
Thanks guys!!!
Knighttemplar
Veteran Member
Skillset, Toolset, Mindset-sounds like you got it covered.
Marie
Veteran Member
Thanks