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Thread: Riva Thermostat

  1. #1
    2000 GPRXP 4tec shooter98xpl's Avatar
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    Riva Thermostat

    I am about to install a Riva Thermostat setup that I got from a greenhulk member. Its already setup and I just have to bolt it on. Its going on a 2005 RXT setup with a green wheel. Hoping to lower the temps. Anything that I need to know before doing so?
    Thanks,
    SHOOTER


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    masta2000's Avatar
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    i've got 100hrs on mine and never looked back, smart buy

  3. #3
    2000 GPRXP 4tec shooter98xpl's Avatar
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    Just bolt on and add new anitfreeze right? What did it do for your ski?
    SHOOTER

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    masta2000's Avatar
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    it keeps the engine cooler which adds a reliability factor, especially with modded engines when you gotta worry about heat soak and such. the only thing to worry about is putting the hoses back at the right place when putting it back together. and yes, just bolt on and torque at the right sequence

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    boosted-delslow's Avatar
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    Why is the rotax racing one so much more than the riva one. Do you have to mod the housing or something with the riva kit?

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    i might be mistaken, but i think the rotax racing one is the entire water pump housing. the riva one comes with a tool for removing the stock t-stat and does not replace the housing.

    maybe someone can explain why they have a 131 degree t-stat, since i've always heard keeping the engine temps around 160 degrees was ideal for performance.

  7. #7
    Focker Foggy's Avatar
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    the 131* tstat, i believe is strictly for closed course/ high comp stuff.
    Just because your tstat opens at a certain temp, does not mean your engine will run at that..
    that depends on your cooling system, ambient temps , etc

    Although I believe that 160* is the best temp to run hipo 4 stroke stuff at for recreational use

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    might as just well remove the t-stat in that case. i gutted the one on my ATV to keep the engine as cool as possible for racing, since i don't ride in cold weather and have to worry about cold starting. t-stats are normally used to get the engine up to temperature, but so many manufacturers spec out ones way too high, which hurts performance.

  9. #9
    2000 GPRXP 4tec shooter98xpl's Avatar
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    Well, its on. I didn't know the torque sequence but do like I do with a motor, alternate sides. The engine temps on my ski usually are around 93 to 95 degrees. So I'll let you know what it runs at tomorrow when we water test. I figured it would add reliability, mainly during the hot summers here in South Carolina.
    Thanks again.
    SHOOTER

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    engine temps around 93 to 95 degrees? where are you measuring that?

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