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Replacement thermostat housings - Warning

Discussion in '206/246' started by TonyL, Jul 25, 2018.

  1. racerboy9

    racerboy9 Formula 3
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    Nov 3, 2003
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    Maybe the "L" series thermostat is different as the one pictured doesn't look like the 4222883 thermostat of the "E" series.
     
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  3. dgt

    dgt Formula 3
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    It's the same part number with note "SAVARA" in the L-series parts manual
     
  4. pshoejberg

    pshoejberg Formula 3
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    Peter H
    The cut out is for sure made in the original machining process. That is very obvious to see when you study the metal at close range. I would not be surprised if this is the original thermostat, but that is only speculation.

    Best, Peter
     
  5. racerboy9

    racerboy9 Formula 3
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  6. MarkT

    MarkT Karting

    Jun 7, 2004
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    Mark Turczyn

    As a confirmation, I pulled out my original thermostat and it was a Savara. It has been so long that I installed a new t-stat that I forget what brand it was. Whatever brand I installed, it has been working well for 15 years now.

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  8. TonyL

    TonyL F1 Rookie

    Sep 27, 2007
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    Nice, out of curiosity what is the depth of the thermostat from the flange to the base of the stat, the diameter of the flange and also the depth from the from flange to the top of the unit.? eg as many measurements as you can.

    Photo 1 - does the base of the stat rest against the port in the housing. There is definately a "polisheed" area that seems to seal against something

    Tony
     
  9. racerboy9

    racerboy9 Formula 3
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    So I measured the flange diameter of my t-stat and got 55.7mm. When closed the distance from the bottom of the flange to the bottom of the t-stat with the Savara name and numbers is 32mm. I heated it in a pan of water and she opened up at the correct temp and when fully opened the distance was 40mm vs 32mm.
     
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  10. swift53

    swift53 F1 Rookie
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  12. BigTex

    BigTex Seven Time F1 World Champ
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    Dec 6, 2002
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    The Ferrari t stat I took out of my 308 was equipped with a nylon or plastic lower seal, about 2mm thick!!

    I doubt the small amount of flow thru matters for the five minutes the engine runs cold???
     
  13. TonyL

    TonyL F1 Rookie

    Sep 27, 2007
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    The 308 thermostat appears to need the rubber seal on the primary disc as it doesnt seal off the port properly when up to temperature, this will / can cause short circuiting through the chamber and cause fluctuations in engine temps while on the move. The 308 housing is different to the 246 unit although the principle is the same.

    If the rubber seal on the primary disc is used on the 246 it does restrict water flow over the sensor and can cause spikes in block temperatures before it actually registers the true temp, it can also become dislodged and block off flow completely - dangerous!

    Best
    tony
     
  14. Skippr1999

    Skippr1999 F1 Rookie
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    Dec 22, 2009
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    Tony,
    Is there something you don’t like about the thermostat I posted from Superformance that seems to be working well ?

    Skipp
     
  15. TonyL

    TonyL F1 Rookie

    Sep 27, 2007
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    Skipp that stat appears to work fine for the 246, i am concerned about 246 stats with the rubber seal on the pri disc....see post 63 second pic
    Regards
    tony
     
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  16. swift53

    swift53 F1 Rookie
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  17. TonyL

    TonyL F1 Rookie

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    Alberto
    If you use a thermostat that has an overall COLD length of 32mm (flange to disc) then that gap should be around 8mm.
    Kind Regards
    Tony
     
  18. swift53

    swift53 F1 Rookie
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