Thermostat

Elementary question...I didn?t see how the thermostat fell out of the housing on my 63 4000 Gas. I really don?t want to play the guessing game, what direction must it go in? Thanks

The end with the pellet and spring goes toward the engine.

As previously stated the temperature sensor has to be on the engine side of the stat or it won’t open .
Stat should be a 195F . This reduces fouling with unburied fuel and oil .

I put a 180 in my 64 4000. It came with something like a 156. Wonder why they used such a low temp thermostat? Detonation?

Spec on Fords is 188F starting in about 1965. The manual on my '88 3910 says 188. Later may use the 195 but I don't have a newer Ford
in my corral, nor a service manual for one. What's a green guy doing on a blue site anyway?

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On the other poster's question about why so low, like everything else back then. No requirement, this and that worked, didn't want to go
out on a limb and try something that might not work and ruin your reputation, put you in bankruptcy, no computers for fast problem
solving, stress analysis programs, no INTERNET for a world of information, no EPA, on and on....like the GM CEO said, before Toyota
invaded the USA....."we will build what we want and you'll have to buy it as you have no other choice..." or something to that effect.
Nothing like competition! Wink!

Interesting idea. Some tractors were built to run on water (sort-a)....cheap fuels of assorted types. Some started on a fuel that would explode and then switched over to water....sorta. JD comes to mind.

Easy way to remember is the water pump should always be trying to push the Tstat closed. Spring goes towards the water pressure.

(quoted from post at 22:49:19 06/09/18) I put a 180 in my 64 4000. It came with something like a 156. Wonder why they used such a low temp thermostat? Detonation?

Click to expand...

Remember that the poorly refined oils of yesterday changed thickness by temperature. So older oils would greatly thin at higher temperatures and thicken at low temperatures. Very hot engine temps could reduce the oil pressure and film coverage. And that older oils were full volatile thinner fluids that would boil off out the crank case vent. This caused a gradual thickning of the oil over time, especially when exposed to higher temps. Older crudely refining processes did not produce high quality oils that are available today. So, running at higher engine temperatures was a not something the older oils could protect the engine very well. Also when the engine cooled down, all the waxes and paraffin would settle out of the oil and form waxy sludge on the surfaces. Many of the impurities would oxidize, mix with moisture and form acids. SO oil performance was the main reason that tractors in the 50s were equipped with a 165 degree thermostat. 180 degree thermostats were for cars and trucks in very cold climates for addition heater output back in the day. Modern oils no longer have a problem with heat, so the temps were moved up MOSTLY for emission purposes and some for performance.

Had to go look at an old automotive stant catalog... 160 was listed as standard and 180 was listed as "alternative".

so much for my 165 memory????.