which thermostat?
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Joined: Jul 2000
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which thermostat?
What is the recommended degree thermostat for the 300 ('87 F250)? I've been running a 180 degree, but since putting in a larger radiator, the temp. hand on the gauge is barely getting to the lowest normal mark and that's in hot weather. I'm wondering if I ought to change.
Thanks,
Meck
Thanks,
Meck
Elder User
Joined: Apr 2001
Posts: 772
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From: Glen Burnie Maryland
which thermostat?
>What is the recommended degree thermostat for the 300 ('87
>F250)? I've been running a 180 degree, but since putting in
>a larger radiator, the temp. hand on the gauge is barely
>getting to the lowest normal mark and that's in hot weather.
> I'm wondering if I ought to change.
>
>Thanks,
>
>Meck
>
>
your '87, irregardless of which radiator and which model it's in is rated for a 195deg. thermostat. Putting a higher temp rated thermostat without replacing ALL hoses will cause increased pressures due to higher surge temps and quite possibly ruptured cooling system.
Also EFI engines require a hotter base temp. A 190deg is the coolest you should run as the computer is calibrated for between 175-185 to switch between cold and hot operation modes.
Sounds like your thermostat is opening up too early and the engine isn't getting warm enough. Go with a 193-195 deg thermostat. Also make sure your hoses are less than 4 years old. Age and heat cracking and flow degradation internally can make them go KA-BLOOEEE at the most inoportune times.
Larry
>F250)? I've been running a 180 degree, but since putting in
>a larger radiator, the temp. hand on the gauge is barely
>getting to the lowest normal mark and that's in hot weather.
> I'm wondering if I ought to change.
>
>Thanks,
>
>Meck
>
>
your '87, irregardless of which radiator and which model it's in is rated for a 195deg. thermostat. Putting a higher temp rated thermostat without replacing ALL hoses will cause increased pressures due to higher surge temps and quite possibly ruptured cooling system.
Also EFI engines require a hotter base temp. A 190deg is the coolest you should run as the computer is calibrated for between 175-185 to switch between cold and hot operation modes.
Sounds like your thermostat is opening up too early and the engine isn't getting warm enough. Go with a 193-195 deg thermostat. Also make sure your hoses are less than 4 years old. Age and heat cracking and flow degradation internally can make them go KA-BLOOEEE at the most inoportune times.
Larry
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