"Haunted" Temp gauge
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Freshman User
Joined: Jan 2011
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From: Greenfield IN
"Haunted" Temp gauge
Hi all.....96 Explorer XLT 4X4 4.0 pushrod V6
Have noticed temp gauge hardly ever moving off full COLD mark. Seemed to always take a while to warm up, and have decent heat out of vents...wont run you out of the truck but is "ok"...so I'm thinking thermostat might not be closing.
So I swaps out T-stat (195 degree), re-fill radiator, fire it up, set heater to high, and wait for full warm up....temp gauge begins moving.....gets to halfway, then eases down to about 1/4. I go out to run errands.....gauge runs up 3/4....drops down.....goes up, then drops down...it's all over the place. I'm stumped and turn to the collective knowledge here-in for guidance/ideas. Thanks in advance.
Have noticed temp gauge hardly ever moving off full COLD mark. Seemed to always take a while to warm up, and have decent heat out of vents...wont run you out of the truck but is "ok"...so I'm thinking thermostat might not be closing.
So I swaps out T-stat (195 degree), re-fill radiator, fire it up, set heater to high, and wait for full warm up....temp gauge begins moving.....gets to halfway, then eases down to about 1/4. I go out to run errands.....gauge runs up 3/4....drops down.....goes up, then drops down...it's all over the place. I'm stumped and turn to the collective knowledge here-in for guidance/ideas. Thanks in advance.
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
still sounds like bad thermostat. I assume you have all the air out of system ? Park with the nose uphill a foot higher than back end. That will make air go toward the radiator and not trapped on top. I cut a high heater hose on my F150 and installed a plastic flushing TEE.. that helps to blead out air when filling the antifreeze. An air pocket in the system can give up- down readings like you suggest.
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nash22
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Dec 27, 2014 02:52 PM
