Cooling issues
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Joined: Jul 2018
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Cooling issues
I have a 1996 ford bronco with the 5.8 v8 with 211k on miles. I recently added a new water pump, thermostat, radiator hoses, alternator, battery, and ac compressor. My bronco has been wanting to overheat but never really climbs all that high and goes up and down constantly. Does not matter if i am in stopnand go traffic or driving on the freeway it still dord the same thing. I think it might be my heater core because i hear the fluid in the dash flowing as if there is still air inside. The heat also doesnt work and i already bled all the air i could from the system. If someone can help me that will be great.
Cargo Master
Joined: Mar 2003
Posts: 2,333
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Did this behavior start after you did the work listed?
You should measure the actual temp with an IR thermometer to see what it is. Gauge on dash isn't that accurate.
If you exceed 210 that could become a problem.
You should have a 195 thermostat and it needs to be installed in the correct orientation.
On your heater core, after truck is warmed up, grab both hoses about mid span. They both should be hot enough to make it uncomfortable to continue holding them.
If only one gets that hot, the heater core may be plugged.
I have found it quite common to hear the coolant flowing behind glove box even after burping the air out of the cooling system.
Fleet Mechanic
Joined: Dec 2006
Posts: 1,925
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From: Phoenix, AZ
We'd need a little more information on the symptoms of wanting to overheat.
If it isn't actually overheating, and the temperature gauge is bouncing around a lot, it very well could be that you just have air in the cooling system and need to purge it out.
If it isn't actually overheating, and the temperature gauge is bouncing around a lot, it very well could be that you just have air in the cooling system and need to purge it out.
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Well what its doing is. The gauage wont bounce around til after around 20mins of driving then where the gauage says NORMAL instead of it staying at the R and M area it will go from R to L up and down sometimes passed L. But then it dies back down to the M and goes up and down from there. So when it goes to the L i try turning on the heater to full blast to take some heat out but the heat doesnt work it blows out room temp air and the gauage will still fluctuate. I tried purging out all the air put the front end on stands to have the radiator at the highest point. Even ran the bronco for a day with no thermostat and it stayed cool only to the R and the M. I do live in arizona and its hot out here. But i put in a new thermostat i dont remember the brand but it was the premium and opens at 192 degrees.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
192 isn't stock temp. What you have is a parts store fail open t stat. The wax pellet is moving so much you will never keep the temperature correct. Get the motorcraft t stat from Ford or Amazon.
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