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  1. #1
    dpracing's Avatar
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    Can you install a riva thermostat kit WITHOUT a press? please help.

    thanks in advance..........................


  2. #2
    dpracing's Avatar
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    anyone?

  3. #3
    Quote Originally Posted by dpracing View Post
    anyone?
    dunno what this riva kit is or entails...

    In an effort to ease summer heat fade....I swapped my oem thermo for a 158* merc....years ago. Somethin like $48.

    Remove end hose.Take a 2qt pitcher of as close to boiling water as you can stand. Slowly pour it over the thermo housing. With large channel locks...slowly turn end cap. It will pop off. It goes back on easier than it comes off. Some have used a worm clamp to reapply pressure on the housing at the cap after it's been replaced. I did.

  4. #4
    dpracing's Avatar
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    Quote Originally Posted by VaRedneck View Post
    Quote Originally Posted by dpracing View Post
    anyone?
    dunno what this riva kit is or entails...

    In an effort to ease summer heat fade....I swapped my oem thermo for a 158* merc....years ago. Somethin like $48.

    Remove end hose.Take a 2qt pitcher of as close to boiling water as you can stand. Slowly pour it over the thermo housing. With large channel locks...slowly turn end cap. It will pop off. It goes back on easier than it comes off. Some have used a worm clamp to reapply pressure on the housing at the cap after it's been replaced. I did.
    thanks for the reply, what is a worm clamp? (picture) what kind of thermostat will go in place of what is there? auto store? marine?

    worm clamp duh! just a standard hose clamp right? I googled it. never heard it called a worm clamp.

  5. #5
    It is a Merc Marine thermostat....158*...or so I always thought. Maybe it was a 160*...all the old threads are gone...couldn't find it on the board.

    I'm sure there's more than one old timer here with a better memory than mine.

    Your lucky day....

    Since nuthin was wrong with my oem thermo I stuck it in the wrapper of the then new 160* Mercruiser thermostat.

    18-3555

    replaces 99155A1 160*

    http://www.marineengine.com/newparts...Engine=&Model=


    made in Canada
    Last edited by VaRedneck; 06-06-2013 at 06:53 PM.

  6. #6

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    R&D sells a kit with the thermostat, wrench, and fitting.

  7. #7
    dpracing's Avatar
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    Quote Originally Posted by VaRedneck View Post
    It is a Merc Marine thermostat....158*...or so I always thought. Maybe it was a 160*...all the old threads are gone...couldn't find it on the board.

    I'm sure there's more than one old timer here with a better memory than mine.

    Your lucky day....

    Since nuthin was wrong with my oem thermo I stuck it in the wrapper of the then new 160* Mercruiser thermostat.

    18-3555

    replaces 99155A1 160*

    http://www.marineengine.com/newparts...Engine=&Model=


    made in Canada
    Thanks so much!!

  8. #8
    Treemn's Avatar
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    NAPA sells the thermostat that is were i ot mine years ago. but a friend did mine similar to what was said earlier

  9. #9
    98gsxl951's Avatar
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  10. #10
    dpracing's Avatar
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    Quote Originally Posted by 98gsxl951 View Post
    thank you again for the replies. how are you guys installing them? ive read heating the housing w boiling water then separating the housing then rassembling with a clamp? is this really safe? please let me know. done a lot of searching cant find much on the details......

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