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  1. #1
    KensGp kenlepack's Avatar
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    coolant blowing out overflow? air?

    i recently put my 2004 rxp (with the mods in my sig) into the water to test. the ski ran great, loads of power, but the ski started blowing coolant out of the overflow tube when run hard. when the ski was apart, i did do the valves and replaced the head gasket, torqued everything to spec. but i did not do the proper coolant refill. i just topped the bottle off a few time until it wouldnt take anymore. i hope this is the reason and it was just trapped air, but the ski seem to blow it out hard under hard accell. i will do a proper coolant flush and go from there. just thought i'de ask for a few ideas while i wait to water test. i checked the hose routings, they are correct.


  2. #2
    Autism Speaks. Its Time To Listen gOt BoOsT's Avatar
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    blown headgasket

  3. #3
    geowelsh's Avatar
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    Sounds like a head gasket leak... You can do a leak down test or change the gasket...

  4. #4
    KensGp kenlepack's Avatar
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    the gasket is new, like 5 minutes. i suppose it could be leaking, will purchase a leakdown tester tmw.

  5. #5
    Eric Ocman's Avatar
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    Quote Originally Posted by gOt BoOsT View Post
    blown headgasket
    +2 Its blown bro.

  6. #6
    KensGp kenlepack's Avatar
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    damn, is it possible on a new gasket?

  7. #7
    geowelsh's Avatar
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    Yep, did you put an oem? And you sure about you're torquing? This is why I like my head studs

  8. #8
    KensGp kenlepack's Avatar
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    yes oem gasket, and triple checked torque. would the thermostat be seized after sitting all winter open?

  9. #9
    geowelsh's Avatar
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    Highly doubt that would have anything to do with it, if it's pressurizing the coolant at high rpms it's because of boost pressure pushing out through the head gasket. Sorry man

    Had the same problem, compression was off, changed the head gasket, sprayed it with copper sealant, problem dissapeared.

  10. #10
    richrxp's Avatar
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    After you torque the headbolts according to specs,set the torque wrench at 95 ft/lbs,and recheck the torgue.
    Some of the oem stretch bolts keep stretching and don't hold properly,so setting them at an angle isn't enough.
    I did 2 headgaskets and had both times some new bolts which didn't hold,but you will never know if you don't check this
    First time coppersprayed the gasket ,this time i did not,and holds on fine.
    Most of the time the gaskets leak , the cause is the headbolts not set at the right torgue value.

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