Bad thermostat?
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Bad thermostat?
Hey guys,
I just bought a 1985 f250 with a 351. A couple days into owning it, I seem to have a cooling problem. The guages for coolant and oil temps both keep spiking. Meanwhile, the radiator is cool to the touch and the radiator hoses are both only slightly warm.
Does this sound like a thermostat problem or possibly something else? The only other thing I can really think of is possibly a clog in the cooling system?
Thanks for the help,
Kaiser
I just bought a 1985 f250 with a 351. A couple days into owning it, I seem to have a cooling problem. The guages for coolant and oil temps both keep spiking. Meanwhile, the radiator is cool to the touch and the radiator hoses are both only slightly warm.
Does this sound like a thermostat problem or possibly something else? The only other thing I can really think of is possibly a clog in the cooling system?
Thanks for the help,
Kaiser
Lead Driver
Joined: Sep 2003
Posts: 7,018
Likes: 210
From: SoCal
Usually spiking temperature readings indicate low coolant or air in the system, which results in surges that cause those erratic readings. Did you check the coolant level, and made sure that you burped all the air out of it?
But if more than one gauge is spiking, then I would suspect a voltage regulator problem in the instrument panel.
My 1987 Mustang instruments all read high when I turn on the parking or headlights.
But if more than one gauge is spiking, then I would suspect a voltage regulator problem in the instrument panel.
My 1987 Mustang instruments all read high when I turn on the parking or headlights.
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