203 T-Stat - Ford Powerstroke Diesel Forum
 
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post #1 of 10 Old 10-01-2009, 05:33 PM Thread Starter
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203 T-Stat

I was on dieselsite and saw some claims about upgrading to a 203 Thermostat...

Anyone ever do this? Any gains or is it a waste of time and money? I have a 97 so im guessing a longstem?

http://www.dieselsite.com/index.asp?...ROD&ProdID=186

1997 F350 4x4, SC, LB, E4OD, 7.3L Powerstroke. 3 inch DP, 5 inch exhaust to 5 inch mitre cut stacks, Bully Dog shift kit, 10K mod, FPR shim, Fumuto drain, 178,000 Miles
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post #2 of 10 Old 10-02-2009, 04:26 AM
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Last winter I suffered with a truck that didn't have heat. The 2 trucks I drove in the winter prior to this one were the same way, I figured that's how they were being diesels.
So I blocked my radiator with cardboard to try to warm it up. Didn't do any good.
Turns out it was the T-stat. This spring I got one from Autozone, it lasted 3 days. Replaced with NAPA, it lasted 2 months. Replaced that one with 203 from Dieselsite, and it's been 4 months now I think.

One of the best things with the 203 is that the other stats stay open till the water drops down to 175* or 180* or something. Bob's 203* closes at 195 I think, so it keeps the heat longer.
It looks exactly like my NAPA stat, down to the exact markings etc, which I was concerned with getting ripped off. But it performs so much better than the NAPA stat did, it's got to be different. I could tell by the temps on the dash gauge.

Go for it. Get a new water neck, too. You'll kick yourself if you don't. The first 2 stats I dealt with the used neck, then when I got Bob's stat I got a neck, too. Worth every penny.

Good luck.
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post #3 of 10 Old 10-03-2009, 07:11 AM Thread Starter
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Great to hear! Where did you get your filler neck?

1997 F350 4x4, SC, LB, E4OD, 7.3L Powerstroke. 3 inch DP, 5 inch exhaust to 5 inch mitre cut stacks, Bully Dog shift kit, 10K mod, FPR shim, Fumuto drain, 178,000 Miles
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post #4 of 10 Old 10-03-2009, 01:26 PM
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Bob sells them too!
Get the stat and neck from him, comes with the stat o-ring as well. His neck is well priced and worth not having to search all over for it.
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post #5 of 10 Old 10-03-2009, 01:43 PM
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i gotta get one to i got the same problem


2016 F450 6.7L XLT 4x4Dump, bone stock
1994 F250 7.3L XLT 4x4 ZF5 , Centurion, 4" Lift, 6637, Gulf Coast Bypass Filter, Big fuel tanks, dana 60 swap, No longer dually
1997 F350 7.3L XLT 4x4Dump, E4OD, 4 in exhaust, TS 6 position, 3/8 Trans line+external filter
2013 Scag Turf Tiger 61" 1.1L Caterpillar Diesel
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post #6 of 10 Old 10-03-2009, 06:14 PM
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i am glad to hear the good news too. mine came in on thursday...

1997 F-350 CC SRW 4x4 Auto w/ Trans Go Kit, Swamps Stage I, TS 6 Position w/ Swamps Custom Tunes, Adrenaline HPOP, DIY Intake, 3"DP w/ 4"Exhaust... Intercooler ready to go in...


1997 F-350 CC SRW 5sp,Swamps Stage II, TS 6 Position, 4" Lift, 35" BFG's, AFE Stage II Intake
3"DP to 6" Stack
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post #7 of 10 Old 10-03-2009, 06:23 PM
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Why do you need the new neck?

Project Frankenstein


1997 Ford F-350, Dually conversion, Cobra 29 LX CB, 12000 watt converter, All LED lights, TW tunes, 4" DP, Napa Intake, coolant filter, 140cc Injectors and lots of running lights.

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Thanks. I'll give er a good wackin in the morning.
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post #8 of 10 Old 10-03-2009, 10:59 PM Thread Starter
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Sooo lol

Whos Bob? Is there a site to where i can order these parts?

1997 F350 4x4, SC, LB, E4OD, 7.3L Powerstroke. 3 inch DP, 5 inch exhaust to 5 inch mitre cut stacks, Bully Dog shift kit, 10K mod, FPR shim, Fumuto drain, 178,000 Miles
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post #9 of 10 Old 10-04-2009, 03:49 AM
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Quote:
Originally Posted by RRonning1984 View Post
Why do you need the new neck?
I thought the same thing. You can re-use the old one if you gob it up with silicone. They get rusted and won't seal at all when you pull them off. I fought with mine for 2 stats then gave up dealing with the silicone and bought a new neck for $35 I think.

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Whos Bob? Is there a site to where i can order these parts?
Sorry, I figured everyone knows DieselSite.com, Bob Riley's website.
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post #10 of 10 Old 10-04-2009, 06:10 AM
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Thanks for the info!

Project Frankenstein


1997 Ford F-350, Dually conversion, Cobra 29 LX CB, 12000 watt converter, All LED lights, TW tunes, 4" DP, Napa Intake, coolant filter, 140cc Injectors and lots of running lights.

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Thanks. I'll give er a good wackin in the morning.
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