WVO...how hot is too hot - Ford Powerstroke Diesel Forum

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post #1 of 8 Old 06-14-2012, 07:35 PM Thread Starter
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WVO...how hot is too hot

Just wondering about the heat in the wvo system. I got 2-water temp sensors. One at the water pump, the other, off the coolant line from my wvo tank. At operating temp, the w/p sensor reads 180*-ish, but the other reads, depending on outside temp and how long of a duration run'n truck, can/will heat 215*-250*. So the question is, with that type of heat run'n thru the tank, is my oil get'n too hot? I have a oil temp sensor up in the valley, where my manifolds' located, but after a bit of driving (1hr-ish), i've seen anywhere from 120*-200*.

I got one of those auxilary coolant pumps which i think is working awesome, but is it working too good, creating the heat. Also in my system, i got the 20-fphe and about a 4ft TIH assy along the frame. With summer here, you think i should ball valve the coolant line once its up to that temp or just switch off the auxillary pump (which i guess will stop flow as well, but its plumbed on the "return" side of the wvo tank, for coolant flow)? thnaks guys.

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #2 of 8 Old 06-16-2012, 03:58 AM
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I think anything over 200 degrees is too hot and that is solely because of the heat exchange happening to your engine.

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post #3 of 8 Old 06-16-2012, 06:58 AM Thread Starter
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the wvo being 200+, or the fact that my coolant in the tank, is get'n past 200*

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #4 of 8 Old 06-16-2012, 02:15 PM
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a lot of both. Remember that there is heat exchange somewhere. You say you saw temps up to 250? Wether that is oil or coolant it is too hot and anything over 220 I would gravely be worried about.

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post #5 of 8 Old 06-16-2012, 06:37 PM
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no science to back it up, but my .02 cents..........
Anything over 200 would be to much for me.

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post #6 of 8 Old 06-17-2012, 07:40 AM
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dejavu?

How hot is too Hot?

I don't think we ever really figured out what was going on in my case either. I regularly see 200 veg temp (coolant temp is generally 10degs higher) with the a/c on and at highway speeds on flat roads. No a/c and flats its 185-190ish. Much more on mountain pulls, 210+ then it backs off immediately as I start the coast down.

Have you confirmed with an infrared gun that the two different gauges match at the sensor locales?

Is there something going on with your gauges like there was when you first did your install (weren't the wires cross feeding)?

at least you aren't too cold on the veg temp side...

2005 Excursion 6.0l Eddie Bauer, 175k
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post #7 of 8 Old 06-17-2012, 07:57 AM
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from the other day

197 ECT

207 Veg Oil temp



This was after 60 or so miles of around town driving with the a/c ON, idling at a stop light.

Ford factory temp gauge never moves from dead center no matter how hot <--- is annoying

2005 Excursion 6.0l Eddie Bauer, 175k
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post #8 of 8 Old 06-17-2012, 08:55 AM Thread Starter
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Thanks for the opinions/pics guys. RIG, My temp locations and wiring are at different ends of truck. The wire from the tank, comes up and in thru the p/s bottom firewall, and the temp at w/p comes in d/s top firewall, plus the wvo gauge is up on rear view window. Still have yet to figure whats up with the f/p gauge at fuel bowl. I bumped up the pressure and thats when it reads up to 40psi, where with the f/p at 55-60psi (too low for my taste), then once on wvo, the f/p gauge for D2 would read 0psi..

Anyway, any of you run'n the external coolant pump. Henry thru it out there, and trust me, the cycling of heat is awesome. Water temp for me to flip switch to wvo is minutes, but was just curious on the amount of heat its protrucing. I tried the other day, turning purge off (stop flow of coolant), but temp laid dormant at 220-ish*.

99.5 x-cab 7.3l, 6spd, 161k miles.....
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