Diesel Site 203* Thermostat

Discussion in '99+ 7.3L PowerStroke Engine & Drivetrain' started by Tman123, Dec 17, 2012.

  1. Tman123

    Tman123 That One Guy

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    Anyone here running the 203* thermostat?

    I just bought one and just wanted to know if switching from stock (I'm assuming is 180*) to this does actually increase MPG and doesn't cause my truck to overheat during the summer (which here in SLC, UT can reach 100+).

    Thanks in advance!

    Travis
     
  2. BIG JOE

    BIG JOE Full Access Member

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    I've been running one for 10+ years now. Temps are 20 to 105+ 'round here (CenCal).. Pulled our 5r all over the lower 48.. with Absolutely No issues.

    No MPG gains to speak of.. but IMO, a Hot(er) diesel, is a Happy(er) diesel. Runs & Pulls better.. Overall ?

    IIRC, Dieselsite has a good Blurb about Tech benefits ?

    Joe

    If yer guna drain the coolant down, to install the 203 thermo ? Now, might be good time to install a Coolant Filter too ? I'd step up and say: It's one of the BEST, Long Term.. PM things you can do for your (any) engine.
     
    Last edited: Dec 17, 2012
  3. DaveBen

    DaveBen SDD Senior Member

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    I would second this information! I have had a coolant filter since 12,000 miles. Great addition!!

    Dave :thumbs
     
  4. RSG

    RSG Full Access Member

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    x2 for Big Joe, and x2 for Dave Ben's advice. I also run the 203 Tstat hot or cold. I can assure you it will help with cold temp MPGs...
     
  5. JimmyDee

    JimmyDee God Bless America

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    I have been running the 203 stat for several years. Sure turns the cab heater into the best heater out there. I do wish I would have purchased the higher priced aluminum housing. Mine is looking a bit not so good.
    Jim
     
  6. BIG JOE

    BIG JOE Full Access Member

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    X2 on the Heat ;tu

    I painted my OEM housing with some High-Temp black BBQ paint.. seems to be holding the rust & corruption back :dunno

    Joe
     
  7. Tman123

    Tman123 That One Guy

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    Well I installed it the other day (Saturday) and had to replace the T-stat housing because mine was stock from 2002 and was rusted almost completely through. lol


    Travis
     
  8. CHPMustang

    CHPMustang Senior Member

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    I also have had the 203 thermo on our 7.3L for close to 10 years also have the aluminum housing installed, gotta love the much toastier heat during the winter!
     
  9. Butch Cassidy

    Butch Cassidy Full Access Member

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    Heat yes, increased mpg no.

    Butch Cassidy
     

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