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Truck over heating
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Thad in AR. View Drop Down
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Joined: 12 Sep 2009
Location: Arkansas
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    Posted: 17 Nov 2018 at 8:47am
1983 Ford F-150 300-6 new water pump a couple months back. It will heat up in 3 or 4 miles. Would a stuck thermostat let it heat that quick?
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
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Points: 41979 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2018 at 8:50am
yes it could , then double check to make sure the temp sending unit is working right also - check the temp of coolant or pull thermostat and check in pan of water on the stove 
Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Thad in AR. View Drop Down
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Points: 9653 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Thad in AR. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2018 at 9:13am
Coke it’s definately getting hot. Starting to steam.
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desertjoe View Drop Down
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 Hey Thad,,like ole Coke says,,pull thermostat first,,,,I would reassemble TS housing and fill with water, restart and run engine to verify (new) water pump IS pumping water. I've had em stick closed as many times as stuck open.  Good luck,,!!
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Thad in AR. View Drop Down
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Joined: 12 Sep 2009
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Originally posted by desertjoe desertjoe wrote:


 Hey Thad,,like ole Coke says,,pull thermostat first,,,,I would reassemble TS housing and fill with water, restart and run engine to verify (new) water pump IS pumping water. I've had em stick closed as many times as stuck open.  Good luck,,!!

I was gonna gut the thermostat and put it back together and try it like you said. It’s stuck at work and I don’t have much for extra time at the moment. I can remove the t’stat At lunch today and give it a try.
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DMiller View Drop Down
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Joined: 14 Sep 2009
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Keep at least the washer body of a t-stat in the housing, the engine will still overheat if flows TOO Much water too fast as will not cool it. Also look at the Old T-stat, should have a bleed hole with or without a rivet in it to bleed air off the head, if blocked even as will open will never remove any buildup of steam or entrained air from the engine side of the stat. If you are gonna pull it anyway, just buy a new one and install it, too cheap NOT to.

Edited by DMiller - 17 Nov 2018 at 10:35am
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chaskaduo View Drop Down
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Points: 5200 		Post Options Post Options   Thanks (0) Thanks(0)   Quote chaskaduo Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2018 at 12:08pm
I've seen thermostats accidentally installed upside down and cause overheating. Also have experienced a bad clutch fan causing overheating.
1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp
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Dakota Dave View Drop Down
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Points: 3971 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dakota Dave Quote  Post ReplyReply Direct Link To This Post Posted: 17 Nov 2018 at 1:38pm
Are you sure you got the correct water pump the multi belt setup water pump turns clockwise and the serpentine belt pump turns the other way. I'd pull the thermostat first with out it you can look in the radiation and see the fluid circulating as soon as you start it.
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Thad in AR. View Drop Down
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Been driving it everyday it just started this yesterday at lunch
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Thad in AR. View Drop Down
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My wife brought my trailer to my job site today. I hauled it home and will work on it tomorrow. I hope it’s the t’stat.
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Dusty MI View Drop Down
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Can't help with the over heating other than others have said. Just want to say I've got a 1989 E-150 300-6 with a 5 speed stick. It was my go to work van and furnace service truck, part time business. Retired now, don't drive it much anymore.

Dusty  
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Hubert (Ga)engine7 View Drop Down
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Overheating in 3 - 4 miles definitely sounds like the thermostat is stuck closed or the new water pump decided to crap out, quality of replacement parts is not what it used to be. As suggested you can pull the thermostat and check for coolant flow or try to save a step and go ahead and replace the thermostat to start with. 
Just an old country boy saved by the grace of God.
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Brian Jasper co. Ia View Drop Down
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From a cold start to boiling over in 3 or 4 miles, the thermostat is not the issue. A cracked head or leaking headgasket is far more likely.
"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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shameless dude View Drop Down
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rats nest under the thermostat
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DiyDave View Drop Down
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Points: 54077 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 20 Nov 2018 at 5:16am
Originally posted by Brian Jasper co. Ia Brian Jasper co. Ia wrote:

From a cold start to boiling over in 3 or 4 miles, the thermostat is not the issue. A cracked head or leaking headgasket is far more likely.

Brian may have it right. a temp check, scanning the engine with a laser thermometer might tell, or this test kit can help:


If I didn't already have the laser thermometer, I would try the t-stat, first, then the coolant leak test...Wink
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Thad in AR. View Drop Down
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Originally posted by Brian Jasper co. Ia Brian Jasper co. Ia wrote:


From a cold start to boiling over in 3 or 4 miles, the thermostat is not the issue. A cracked head or leaking headgasket is far more likely.

I was thinking the same thing. It usually takes quite a while for it to warm up and this happened fast. I’ll look at it Thursday.
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