1979 ford overheating
Senior User
Joined: Feb 2009
Posts: 308
Likes: 0
From: Southern NM
Get a new thermostat installed.Be sure to get the right design.When you get squared away,post back with your results and let's see what happened.Be certain about the fan,and about the air flow through your condenser.
Senior User
Joined: Feb 2009
Posts: 308
Likes: 0
From: Southern NM
Montana,not trying to step on your post about the Motorcrafts.Another poster here awhile back said he had talked to two different Ford dealers in his area about this thermostat,and that was the information he was given.I used to purchase them at rockauto myself,but they have been discontinued there as well.I know you can purchase them at Amazon,but the shipping is almost as much as the part.
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
Montana,not trying to step on your post about the Motorcrafts.Another poster here awhile back said he had talked to two different Ford dealers in his area about this thermostat,and that was the information he was given.I used to purchase them at rockauto myself,but they have been discontinued there as well.I know you can purchase them at Amazon,but the shipping is almost as much as the part.
Postmaster
Joined: Jul 2001
Posts: 4,956
Likes: 10
From: MD
How old is the coolant? Is it 50/50?
Motorcraft RT139 (192f) went obsolete a few months ago.
When looking for a thermostat, you need to find a thermostat that has the extra pellet that sticks out when the thermostat opens. Don't buy one without it.
What type of A/C? Dealer, aftermarket, or factory integral? How's the fan clutch?
Motorcraft RT139 (192f) went obsolete a few months ago.
When looking for a thermostat, you need to find a thermostat that has the extra pellet that sticks out when the thermostat opens. Don't buy one without it.
What type of A/C? Dealer, aftermarket, or factory integral? How's the fan clutch?
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New User
Joined: Jun 2009
Posts: 20
Likes: 0
Well I went to o'reilly auto parts today and the thermostat they show for my truck is a murray 192...it seemed to help it only creeped up to about 205 once and that was just off the hwy at a stop sign then it went back to 200.
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