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  1. #1

    Default 83 5 liter thermostat temp

    Anyone know what temp Thermostat an 83 5 liter would have come from the factory with?
    thanks

  2. #2
    FEP Power Member gmatt's Avatar
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    I'm thinking 195
    Last edited by gmatt; 04-27-2022 at 05:26 PM. Reason: spelling

  3. #3
    FEP Senior Member gt4494's Avatar
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    180 - 195 degrees will work fine. Not sure hwre you are but I tend to run 180 in the south.
    "If you can't explain it simply, you don't understand it well enough."
    Albert Einstein

    1984 20th Anniversary GT350
    Almost "Stock"

  4. #4

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    I find 195 is great for me but I am in New York and I have cfi. If I were you, I would pop in a oil temp gauge (I use a super simple drain plug version that works great) and tune my thermostat to whatever keeps the car in the good zone. To me that means I hit 210 on normal everyday drives, up into the 230s and higher when pushing it hard, and doesn't muck around for very long below 200.

    If you don't get the oil up to 210ish you build up crap in the oil that will damage your engine, go much over 250 and things are probably getting too hot in spots. I use 0w40 mobile 1 which is good upt to 350 but many lesser oils fall apart as low as 260
    1984.5 G.T.350 5.0 CFI AOD Convertible (TRX package, loaded)
    K&N filter in stock dual snorkel
    GT40 heads, Edelbrock 3721 intake, MSD 8456 Dist., MSD 8227 coil
    Comp cams XE254H, hypereutectic pistons
    Hooker Super Comp Shorty Equal Length Headers
    catted BBK H-pipe, full custom duals
    Maximum Motorsports caster/camber plates and strut tower brace, 3.73 rear.
    Ford Performance Springs, Firehawk A/S 225/55r16 on LMR TRX r390 wheels (street)
    Federal 595 rs-rr 245/40r17 and 255/40r17 on OE cobra r wheels (race)
    Everything else stock and fully functional.

  5. #5
    FEP Power Member richpet's Avatar
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    Anything from 180-195 will work great.
    Even in a hot environment. As long as your cooling system is functioning well.

    Sent from my Pixel 6 Pro using Tapatalk
    Last edited by richpet; 04-28-2022 at 02:59 PM.
    83 5.0 GT. Quicker than it looks! 10:1 (or just over) 306, Motorsport a332 cam, 140A alt, t5 conv, 8.8 w/ 3.27's, Edel rpm, alum rad, very worked e7's, Holley SA carb, etc... SOLD IT!!!!

    Now an 1981 Granada! 9.5:1 .040 over 302, Edel E-street heads, 268 cam, T5, 8.8 with 3.55, plus all the stiffening goodies, all control arms, lowered, alum shaft, x-pipe with Outlaws, FiTech FI system...

    "Never underestimate the power of stupid people in large groups"

  6. #6
    FEP Member TMcG85GT's Avatar
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    Stock was 195 in my '85. I'm near certain it was the same in '83.
    Tim McG
    I've owned my '85 GT since '86.....I call THAT 4-eyed pride!

  7. #7
    FEP Power Member richpet's Avatar
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    It was.
    I built my .040 over 302 stoutish and use a 195 T-Stat. Radiator works great as do the fans so my temp stays between 190-205 all the time. Runs great...

    Sent from my Pixel 6 Pro using Tapatalk
    83 5.0 GT. Quicker than it looks! 10:1 (or just over) 306, Motorsport a332 cam, 140A alt, t5 conv, 8.8 w/ 3.27's, Edel rpm, alum rad, very worked e7's, Holley SA carb, etc... SOLD IT!!!!

    Now an 1981 Granada! 9.5:1 .040 over 302, Edel E-street heads, 268 cam, T5, 8.8 with 3.55, plus all the stiffening goodies, all control arms, lowered, alum shaft, x-pipe with Outlaws, FiTech FI system...

    "Never underestimate the power of stupid people in large groups"

  8. #8
    FEP Super Member erratic50's Avatar
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    Ford put a 190 degree in the mid-90's F250 and F350 HD with 460. It is a high flow piece and Motorcraft so it is an outstanding part. Works great in our foxes. We run them in several foxes as well as in our 96 F250.

    Part number is
    RT-1067-A
    Last edited by erratic50; 05-08-2022 at 04:05 AM.

  9. #9

    Default

    Part number for the thermostat is F5DZ8575A, it's a 197 degree thermostat.

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