Thermistat issue - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 10-12-2013, 05:54 AM Thread Starter
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Thermistat issue

Hello,

This morning on my way into work I happened to notice that my ECT never saw above 180F. It hovered around 176F for most of my trip. The ambient air was pretty cool this morning it was 38F/40F. If the coolant temp never reached 180 could the thermistat be stuck open? My EOT was around 182-184F for most of the trip. I realize the cold air passing through the rad will cause the temp to be alittle low but my trip is all highway at around 100-105 KPH I've always seen above 180F this is why I am little concerned.



Ryan

2006 Powerstroke 6.0
Blue spring mod
CAT EC-1
Coolant filter
Garrett Powermax turbo
Tuned by gearhead performance
MBRP 4" tubro back exhaust 5" rolled tip
4" ICON suspension lift
35" toyo MT's
BMF Novakanes
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post #2 of 7 Old 10-12-2013, 06:05 AM
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Im not sure Id be concerned about your temps. Thats about what mine runs in the winter time until Im workin it hard then it'll come up. But as soon as I ease up it go's back down.
Now that being said the t-stat could be having issues. Its a very easy diy type of thing to do. So Id say living up were you do and as cold as it get's up their, for peice of mind Id change it out.
And while your at the parts store grab a new degass bottle cap.....while your at it.

BPD OIL COOLER W/COLD WEATHER PACK & BPD oil bypass amsiol filter
BPD WATER PUMP, RADIATOR+ EGR.ARP STUDS
,edge turbo timer
5" TB DIAMOND EYE EXH
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post #3 of 7 Old 10-12-2013, 07:26 AM Thread Starter
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Thanks for your help, If I'm really haulin I could reach 180 but it will not exeed that.

Ryan

2006 Powerstroke 6.0
Blue spring mod
CAT EC-1
Coolant filter
Garrett Powermax turbo
Tuned by gearhead performance
MBRP 4" tubro back exhaust 5" rolled tip
4" ICON suspension lift
35" toyo MT's
BMF Novakanes

Last edited by RY86; 10-12-2013 at 08:06 AM.
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post #4 of 7 Old 10-12-2013, 09:24 AM
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Mine was the same way in the winter. What I did when I removed my EGR cooler which really made a BIG difference with my truck in maintaining engine temperature in the winter plus a nice warm cab and actually reduced the amount of fan clutch engagement in the summer was to reroute the coolant flow that is coming out of the oil cooler thru a four port coolant valve, then to the heater core, then from the heater core back thru the four port coolant valve and from the four port coolant valve I have the coolant returning not thru the regular route which is across the firewall, to the degas bottle which is connected to the cold side of the front engine cover (which originally acts like a big 3/4" recycle loop), but to the hot side header of the front engine cover which originally was the heater core coolant supply. Of coarse you would need to block the original EGR cooler return port on the engine front cover. On my Ex I removed tapped and threaded in an aluminium plug but I have done the same coolant reroute on a number of buds trucks using just a stainless steel sheet metal disk at the donut. The logic behind my "Term3 coolant mod" as my buds have called it LOL, is that pumps have a specific volume of liquid that they can move at a given RPM so the original 3/4" coolant path from the hot side coolant header to the heater core and back to the water pump suction side is just a long bypass line that reduces the total flow going to the engine and oil cooler. More coolant volume being pumped to the engine block and oil cooler the better temperatures are going to be controlled by the thermostat which itself is an automatic bypass from the hot side header to the water pump suction. Of the guys that I helped do this coolant reroute with everyone of them were mad that I didn't think of it sooner once they had experienced the improvement. Next on my list of cold weather add-ons is a cab actuated rad "winter front".


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.

Last edited by Term3; 10-12-2013 at 09:35 AM.
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post #5 of 7 Old 10-12-2013, 12:24 PM
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Here's some pics I took when I plugged off the EGR cooler coolant return port on my front engine cover.
Thermistat issue-imageuploadedbyautoguide1381605456.144903.jpg
Thermistat issue-imageuploadedbyautoguide1381605479.809168.jpg
Thermistat issue-imageuploadedbyautoguide1381605507.076795.jpg
Thermistat issue-imageuploadedbyautoguide1381605533.448959.jpg
You can just use a sheet metal disk, you don't REALLY need to screw in a plug, but I usually try and avoid half aśś work when it comes to my Excursion.


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #6 of 7 Old 10-12-2013, 02:09 PM
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I guess Im gonna be checkin that out tonite!

BPD OIL COOLER W/COLD WEATHER PACK & BPD oil bypass amsiol filter
BPD WATER PUMP, RADIATOR+ EGR.ARP STUDS
,edge turbo timer
5" TB DIAMOND EYE EXH
ATLAS 40
TITLE IN HAND...
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post #7 of 7 Old 10-12-2013, 05:03 PM
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When I first came up with my coolant reroute mod I posted on either this forum or the Nation some before and after numbers but I don't recall the temperatures. All I remember is that there was a significant improvement plus I even tried routing the oil cooler coolant to the bottom of the degas bottle but found routing it back to the hot side header with the heater core "bypass" blocked off the path that made the biggest change. Now I only use a winter front in extremely cold weather.


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SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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