I did this in my 94 I6 last fall. I was worried that the temp only went up to the O in normal on the gauge. I installed the new thermostat and there was no change. Ive heard that it is normal for the temp needle to hardly move. My heat works fine so I guess its normal.
If your truck has a radiator cap on the radiator instead of expansion tank, open it up and see if it flows coolant all the time. Should go in cycles if t-stat is opening and closing. No cap makes it harder, need to remove t-stat and look at it physically. As mentioned earlier the temp element whether a spring or a pellet has to go into the engine away from the radiator.
i've done quite a few of thermostats and never used silicone just a new gasket which they should give u when u buy a new thermostat...just make sure to clean all old gasket off, on thermostat housing and on motori use a blade to do it, be very careful not to groove into the metaland all should be well...on my 5.8l i remove belt and idler pulley to get better access to the thermostat
when i did mine on my 5.0 i used silicone. even though it came with a gasket, i used it just to be safe. havent had a leak yet and i didnt have to remove any belts or pulleys for better access. i like gms style intake better with the thermostats on top of the intake manifold rather than on the side. just think its a better design.
you might already have an aftermarket t-stat on there. I have a 180 degree t-stat on mine and it barely moves from cold. is this a recent issue or has it always been that way?
95 F150 XLT, 5.8L EFI, 2-wheel drive, k&n intake, magna flow exhaust, chip programmed with a 91 tune, custom lift with 86 F150 i-beams, dual fox racing shocks up front, deavers in the rear, 35x12.5 BFG All-terrains, ford racing posi
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