Thermostart Ford 4500

Brad Buchanan · Mar 15, 2018

Hey folks.

I have a 70'ish Ford 4500 that I rebuilt last year. It has always started right up if it is 60 degrees f and up but was balky below that. It is a 201 3 clyinder diesel.

I put a 1200 watt tank heater on it and it helped quite a bit although if it was below freezing it would take a minute of cranking before it started.

I bought a thermostart and installed it in the intake and plumbed it into the injector return line.

I mounted a momentary switch wired to the ign terminal and found through trial and error it likes to be energized for about 70 seconds before cranking.

20 degrees f. yesterday and it fired almost immediately.

Does make a bit of a whoosh when the thermostart lights off though.

Best $25 I have spent in a while.

Now if I could get rid of that little miss at high rpm/no load.

Brad Buchanan

David G · Mar 15, 2018

I had the high RPM miss, was broken spring on one of the pistons.

Make sure and service the pump if an inline model with oil changes.

Ultradog MN · Mar 16, 2018

There were a few early 3000s with an inline pump. All the rest of the 3 cylinder Fords used the rotary pump - all the way through their entire production.

Texasmark1 · Mar 16, 2018

Interesting, I have a '65 3000 with the CAV pump and my service manual shows the Simms inline and states that it WAS THE pump for the series......so much for printing manuals before production changes. I have had half a dozen or so Fords over the years and prefer the CAV to the Simms.

Still sitting on that 3000 and a '63 2000D with about 3700 orig hrs, no wrenches on engine proper, same CAV pump, original proofmeter still working....starts and runs like a top, 50# oil pressure.

Thermostart Ford 4500

Brad Buchanan

Member

David G

Well-known Member

Ultradog MN

Well-known Member

Texasmark1

Well-known Member

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