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Thread: Thermostat housing install - tips please

  1. #1
    Registered User kwahl's Avatar
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    Thermostat housing install - tips please

    i AM HAVING A DEVIL OF A TIME GETTING MY THERMOSTAT ASSEMBLY NOT TO LEAK

    The lower right bolt on the housing has a blind end consequently this bolt is shorter than the others
    I stripped out the upper right bolt (6mmx 1.0 pitch) but I was able to get a long bolt with a nut
    As i tighten my bolts I am leaking. Disassembly confirmed a torn rubber gasket (3/32 inch thick)
    I purchased correct rubber and made my own. I do have a hole drilled in the top of my TStat.
    I have used gasket cement to hold these rubber gaskets in place. Not tight enough- leak
    too tight- torn gasket... Suggestions? Thanks
    Keith
    Life's a journey, enjoy the ride
    1963 STUDEBAKER AVANTI
    1966 FORD THUNDERBIRD CONVERTIBLE
    1962 MERCEDES 190 SL
    1955 STUDEBAKER CONESTOGA WAGON WITH SUPERCHARGED AVANTI ENGINE
    1955 STUDEBAKER CONESTOGA WAGON WITH 35O CHEVROLET ENGINE
    1953 STUDEBAKER LOEWY COUPE
    1946 TRIUMPH 1800 ROADSTER UNDER RESTORATION

  2. #2
    Administrator wpuryear's Avatar
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    No gasket sealer and only light to moderate tightening is needed. Use of a sealer will cause the rubber to squirt out of place. Two gaskets, one on each side of the thermostat. I donít recall a blind hole in the housing.

    Walt

  3. #3
    Registered User kwahl's Avatar
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    Re: Thermostat housing install - tips please

    Yes Walt...the lower right bolt has a blind end. This is the one closest to the engine block
    Yes One on each side of the TStat. I did let the gasket cement set up - maintained position
    Better. I will try not to overtighten.. Thank you
    Life's a journey, enjoy the ride
    1963 STUDEBAKER AVANTI
    1966 FORD THUNDERBIRD CONVERTIBLE
    1962 MERCEDES 190 SL
    1955 STUDEBAKER CONESTOGA WAGON WITH SUPERCHARGED AVANTI ENGINE
    1955 STUDEBAKER CONESTOGA WAGON WITH 35O CHEVROLET ENGINE
    1953 STUDEBAKER LOEWY COUPE
    1946 TRIUMPH 1800 ROADSTER UNDER RESTORATION

  4. #4
    23K Original Miles slover's Avatar
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    Re: Thermostat housing install - tips please

    This is one of those installations that doesn't feel good. Follow Walt's instructions. I too, do not recall a hole that terminates, but would have to look. DO NOT USE SEALANT, see pics from a restorer who did who was once highly regarded, and what I found. Tightening is a bit of an art. Too tight and you will leak. In fact, it almost feels like it's too loose, but that's when it seals. For lack of a better description, tighten just very slightly snug and not to the point where the rubber at all squeezes out.
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  5. #5
    Administrator wpuryear's Avatar
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    Re: Thermostat housing install - tips please

    You are quite correct, there is a blind hole. Any success?

    Walt

  6. #6
    Registered User kwahl's Avatar
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    Re: Thermostat housing install - tips please

    thanks Walt and John.. That blind hole takes a shorter bolt
    I ordered gaskets from Millers
    Yes tightening is an art and i did find too tight and it leaks
    Any tricks to getting everything in place all at once.. not so easy

    Keith
    Life's a journey, enjoy the ride
    1963 STUDEBAKER AVANTI
    1966 FORD THUNDERBIRD CONVERTIBLE
    1962 MERCEDES 190 SL
    1955 STUDEBAKER CONESTOGA WAGON WITH SUPERCHARGED AVANTI ENGINE
    1955 STUDEBAKER CONESTOGA WAGON WITH 35O CHEVROLET ENGINE
    1953 STUDEBAKER LOEWY COUPE
    1946 TRIUMPH 1800 ROADSTER UNDER RESTORATION

  7. #7
    Administrator wpuryear's Avatar
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    Re: Thermostat housing install - tips please

    There should be two long bolts 6x18mm to accommodate the overflow tube brackets on top and two short 6x15mm for the bottom.

    Walt

  8. #8
    Registered User kwahl's Avatar
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    Re: Thermostat housing install - tips please

    Correct
    Somebody used 1/4 x20 so i had to tap 1 hole for a 7mm x 15
    The longer bolt was stripped and i used a 6mm with a nut
    Life's a journey, enjoy the ride
    1963 STUDEBAKER AVANTI
    1966 FORD THUNDERBIRD CONVERTIBLE
    1962 MERCEDES 190 SL
    1955 STUDEBAKER CONESTOGA WAGON WITH SUPERCHARGED AVANTI ENGINE
    1955 STUDEBAKER CONESTOGA WAGON WITH 35O CHEVROLET ENGINE
    1953 STUDEBAKER LOEWY COUPE
    1946 TRIUMPH 1800 ROADSTER UNDER RESTORATION

  9. #9
    Registered User kwahl's Avatar
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    Smile Making the simple complicated more on thermostats

    I could not get my thermostat to seal.. As it turns out the thermostat i purchased from my local part store with ciorrect corresponding number was slightly too big
    it measured 55 mm diameter and the correct size should be less than that.. The actual receiver hole is 45 mm.. Some of you learned that the lower right hole that goes into the housing is a blind end with a 15 mm length while all the others are 18 mm

    so what was happening is that as i tightened toi get a seal i was TIGHTENING TOO HARD against the rubber and tearing the gasket. Also somebody used a 1/4 20 bolt in a 6mm hole which i tapped to 7mm. Another hole was also stripped. So we will order the correct size..
    Helicoil the holes and reinstall the tstat.. I learned alot!! Thought i would share

    keith

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