Temperature change
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Senior User
Joined: Sep 2011
Posts: 156
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From: Whispering Pines, NC
Temperature change
On my 83 f150 4x4 5.8 liter the faster i travel, the hotter the engine gets. The truck doesn't over heat, just runs hotter. Of course Fords run hot. Would an an antifreeze change help keep the temperature normal? I've learned that the repair shops that utilize the forced flush tend to do more damage than good. The thermostat, senders, and sensors are new and are working as they should. In addition to the many questions, do the repair shops simply empty the radiator? Any advice would be great.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
At highway speeds the fan is contributing very little to flow over the radiator.
The radiator may have scale or clogged tubes inside.
There may be mud or bugs packed in the fins.
Maybe the water pump impeller has rusted away.
Who knows?
But I would check for flow with the thermostat hot and open, and do some investigating as to why the radiator can't shed enough heat.
Fleet Mechanic
Joined: Jul 2011
Posts: 1,916
Likes: 4
The stock thermostat is around 192 degrees.
Do a back flush on the cooling system until the antifreeze/water comes out clear. Change all your cooling system hoses, and refill with 50/50 premix antifreeze.
Do NOT use well water to flush your radiator. You're truck is probably heating up so much because of rust/corrosion in the cooling system, and putting rust in there won't solve the issue.
EDIT:
Just thought of something else as well. Make sure your radiator isn't packed full of crud, and make sure it isn't damaged in any way.
Moderator
Joined: Jan 2001
Posts: 56,995
Likes: 2,741
From: Virginia
Shouldn't be an issue if he says "the faster I travel the hotter it gets"
At highway speeds the fan is contributing very little to flow over the radiator.
The radiator may have scale or clogged tubes inside.
There may be mud or bugs packed in the fins.
Maybe the water pump impeller has rusted away.
Who knows?
But I would check for flow with the thermostat hot and open, and do some investigating as to why the radiator can't shed enough heat.
At highway speeds the fan is contributing very little to flow over the radiator.
The radiator may have scale or clogged tubes inside.
There may be mud or bugs packed in the fins.
Maybe the water pump impeller has rusted away.
Who knows?
But I would check for flow with the thermostat hot and open, and do some investigating as to why the radiator can't shed enough heat.
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