Bad thermostat or normal?? - Ford Powerstroke Diesel Forum
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post #1 of 13 Old 12-28-2012, 04:35 PM Thread Starter
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Bad thermostat or normal??

I finally have been-able to put on some miles since getting a monitor. The outside temps have been in the teens and twenties. I am only seeing ECT temps of around 177-178*...........Is my thermostat bad, or is my cooling system good??

If it makes any difference, my deltas have been around 6-9*


2005 F350 Lariat FX4
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post #2 of 13 Old 12-28-2012, 04:38 PM
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Originally Posted by mhines81 View Post
I finally have been-able to put on some miles since getting a monitor. The outside temps have been in the teens and twenties. I am only seeing ECT temps of around 177-178*...........Is my thermostat bad, or is my cooling system good??

If it makes any difference, my deltas have been around 6-9*
Thermostat is stuck open. When you replace it, only use a Motor Craft thermostat.

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post #3 of 13 Old 12-28-2012, 04:45 PM
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This ^^^

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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post #4 of 13 Old 12-28-2012, 05:54 PM
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so should i worry when i'm seeing 160-175, normally in the 160's with ambient temps up to 60?

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
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post #5 of 13 Old 12-28-2012, 05:57 PM
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Originally Posted by psd_va View Post
so should i worry when i'm seeing 160-175, normally in the 160's with ambient temps up to 60?
That's extremely low. Sounds like yours is stuck completely open. Need to replace it. Will probably be surprised how much better it runs.

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post #6 of 13 Old 12-28-2012, 05:59 PM
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truck seems to run pretty well now but i do plan on digging into the engine for studs and some other things and probably will do the thermostat then.

03 F350 6.0 SRW 4X4 lariat

481hp 832tq

8" super lift 385/70r16 Toyo MT's
FatBoy traction bars
Durastroke stg1
intake
MBRP 5" straight pipe
Custom tuned by Vivian "Looney Wild Track"
Edge Insight CTS
Zoodad mod
high idle mod
6.4 banjo bolts
Updated fuel pressure regulator (Blue spring mod)
EGR cooler delete
6K 55w HID's
6k 35w fog HID's
B&W turnover ball


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post #7 of 13 Old 12-28-2012, 06:10 PM
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Originally Posted by psd_va View Post
truck seems to run pretty well now but i do plan on digging into the engine for studs and some other things and probably will do the thermostat then.
Get it changed, it's simple. Diesels require proper op temps for complete and effecient combustion. Does your oil get dirty quick from soot?

Sent from my phone that somebody didn't help me get.

Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

SEE MY OIL COOLER REPLACEMENT AND EGR DELETE - http://www.powerstroke.org/forum/gen...tml?highlight=
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post #8 of 13 Old 12-28-2012, 11:39 PM Thread Starter
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So does it make sense that i am getting good HOT heat from the heater, even if it is stuck open? The dash gauge shows normal, I have great heat, but according to the Livewire, I'm running cool.

Still change it?


2005 F350 Lariat FX4
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post #9 of 13 Old 12-28-2012, 11:56 PM
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when doing ur t stat upgrade to the blue spring mod too

http://img716.imageshack.us/img716/2580/oppt.jpg
2006 F250 Crew Cab Long Bed 6.0 TurboDiesel FX4

Diesel Site Coolant Filter, Edge Insight CTS, BPD FICM 48v, Metal CAC Tube, Blue Spring,Sinister Diesel EGR Delete w/ Up Pipe, Riff Raff Boots, MBRP 6212-409 Exhaust, BFG AT's,
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post #10 of 13 Old 12-29-2012, 05:46 AM
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Quote:
Originally Posted by mhines81 View Post
So does it make sense that i am getting good HOT heat from the heater, even if it is stuck open? The dash gauge shows normal, I have great heat, but according to the Livewire, I'm running cool.

Still change it?
You'll have heat even if the thermostat wasn't there at all. The problem is that you're engine and sensors aren't making it to normal operating temps which is hard on it.

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