Heat Issues
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Elder User
Joined: Oct 2003
Posts: 598
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From: Harrisburg, SD
Heat Issues
My 87 302 bronc is being a little sob lately and not heating up. I changed the thermostat (180 degree), the coolant is nice and green hasnt been flushed in a couple years though, I back flushed the heater core and she's still acting up. shes full of coolant and i let her run for 20 min or so with the cap off to try and bleed out any air. I have not checked the heat ducts or the Blend door yet.. The temp gauge will only barely move after driving for any amount of time (but it does move) I am putting my money on the engine not completely warming up. I ran my lazer temp gauge on some things and this is what I got after driving for a half hour
Temp at vent inside 135 (degrees)
Water pump 150
upper hose 135
Those numbers seem low to me.. Any more Ideas anyone im kind of out...
Temp at vent inside 135 (degrees)
Water pump 150
upper hose 135
Those numbers seem low to me.. Any more Ideas anyone im kind of out...
New User
Joined: Dec 2007
Posts: 1
Likes: 0
Heat Problems
I am having the same problem, The guy at Auto Zone recommended the heater control Valve. I can not find it in any of the books that I have. Does this even exist on a 89 ford bronco. This was after I replaced the heater core.
Senior User
Joined: May 2004
Posts: 232
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Just hook up 2k+ lbs to the tow hitch, and be done with it. My Bronco runs cold year round, but heats up nicely when pulling the boat uphill...
On a serious note...
My 95 Mustang GT ran cold year round too, but it would get hot enough to produce heat from the heater. You could always try the "big-rig fix" if all else fails, and cover half of the radiator with something.
On a serious note...
My 95 Mustang GT ran cold year round too, but it would get hot enough to produce heat from the heater. You could always try the "big-rig fix" if all else fails, and cover half of the radiator with something.
Junior User
Joined: Sep 2005
Posts: 95
Likes: 0
Have you pressure checked your cooling system? If it is not holding pressure,it won't come to proper temperature.
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Elder User
Joined: Oct 2003
Posts: 598
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From: Harrisburg, SD
This weekend im putting in the right thermostat, and going to buy a pressure tester for the radiator. Does anyone make a grill cover for the winter time to fit big broncs? Ive seen them on F150s i believe....
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Senior User
Joined: Nov 2004
Posts: 225
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From: Birmingham AL
Your thermostat housing is probably like mine. I had trouble with it leaking. The problem was that the thermostat has to sit in a groove in the housing and mine kept slipping out. I finally had to use permatex and glue the thermostat in the housing before I installed the gasket and bolted it to the manifold.
Joined: Jul 2006
Posts: 1,328
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From: Capac MI
Your thermostat housing is probably like mine. I had trouble with it leaking.
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