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  1. #1

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    Can someone tell me how to remove the thermostat?

    My rxp is getting hot. I want to remove the thermostat. Is this simple. I'm guessing so but thought I would ask first. Anyone have any directions?


  2. #2
    Richieb's Avatar
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    How hot is it getting?

  3. #3
    lextoy's Avatar
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    what makes you think its the Tstat??
    maybe its overheating on the raw water cooled exhaust open loop???
    thats alot more common point of failure.

  4. #4
    Quote Originally Posted by lextoy View Post
    what makes you think its the Tstat??
    maybe its overheating on the raw water cooled exhaust open loop???
    thats alot more common point of failure.

    Would you explain what you are talking about here ?

  5. #5

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    Well I thought I would try something and that seemed to be the easiest thing to start with. Do I pop the cover off with a screwdriver or what?

  6. #6
    lextoy's Avatar
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    ok guys.
    your engine has two separate cooling loops.
    1) engine block, closed loop, cooled by antifreeze circulation, that uses the rideplate as a heat exchanger, also cools the oil cooler. this system utilizes the thermostat to regulate engine temps.
    2) exhaust system, exhaust manifold, and the intercooler are all open loop cooling, meaning that raw water from the lake or ocean( or whatever) is pumped thru the system to cool those parts. thissystem uses the jet pump thrust to pressurize water up thru the system.
    it is common for the open loop to get clogged with debris and restrict flow, thus cooling to the exhaust is restricted, and overheating occurs, especially when the debris clogs teh tiny water holes in teh J pipe that cool teh exhaust gasses as they enter the waterbox.
    this will cuase the temp sensor in the waterbox to alarm and throw a code, or melt the waterbox!!
    thers lots of routing and hoses that water goes thru both systems to cool, i know how some of them go , and this helps me understand what cools what, if i got something wrong, somebody else chime in

  7. #7
    Moderator Snoman's Avatar
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    Quote Originally Posted by lextoy View Post
    ok guys.
    your engine has two separate cooling loops.
    1) engine block, closed loop, cooled by antifreeze circulation, that uses the rideplate as a heat exchanger, also cools the oil cooler. this system utilizes the thermostat to regulate engine temps.
    2) exhaust system, exhaust manifold, and the intercooler are all open loop cooling, meaning that raw water from the lake or ocean( or whatever) is pumped thru the system to cool those parts. thissystem uses the jet pump thrust to pressurize water up thru the system.
    it is common for the open loop to get clogged with debris and restrict flow, thus cooling to the exhaust is restricted, and overheating occurs, especially when the debris clogs teh tiny water holes in teh J pipe that cool teh exhaust gasses as they enter the waterbox.
    this will cuase the temp sensor in the waterbox to alarm and throw a code, or melt the waterbox!!
    thers lots of routing and hoses that water goes thru both systems to cool, i know how some of them go , and this helps me understand what cools what, if i got something wrong, somebody else chime in
    Correct...

    If you Think your engine is getting hot then what would make you think this??Is the ski setting off codes or is it getting say to warm for what your "Liking"??Just popping off the front and changing the thermostate is not just that easy..It is easier to change the whole assembly that it is to change the stat..Here is Rivas thermostate mod instruction sheet to give you an idea on how to change the thermostat..

    http://www.rivamotorsports.com/instructions/rs1015.pdf

  8. #8

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    Yes, I want it to run cooler. So, I would probably break it then if I take it apart?

  9. #9
    Moderator Snoman's Avatar
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    Quote Originally Posted by castiljd View Post
    Yes, I want it to run cooler. So, I would probably break it then if I take it apart?

    Not saying you will...But chances are good it could..

  10. #10
    Fastest in my cove sfackett0's Avatar
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    umm isnt there a write up about this in the how-to section

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