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  1. #1
    Michigan sn-95's Avatar
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    Lost RPM. Could my Intercooler by toast?

    I just bought a RXT-X with 38 hrs. Rpms were great "about 8060". I went and did some hard riding for about an hour including some wave jumping. On my way back to the dock I couldn't get more than 7840 rpm. I started tearing things down and found some oily gunk between the IC and TB.

    I cleaned the IC and TB, and checked the OPAS hose, the plugs and SC slip. "everything other than the IC looked great. Another member said my IC could be toast. I was hoping to get a few more opinions before buying a new IC.

    BTW I found a pair of pliers, a screwdriver, and two wrenches in the bilge. I've really got to stop buying crap used.


    I know I saw some pics of this same gunk recently in another thread, but I can't find it.
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  2. #2
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    I'm leaning more towards SC seal is gone.

    (Oily water mix.. Looks like baby spew) lol

  3. #3
    83.0 @ 8400 jhill19's Avatar
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    +1 looks like oil and water is leaking, you could've bumped your other thread other than making a new one.

  4. #4
    Michigan sn-95's Avatar
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    Quote Originally Posted by jhill19 View Post
    +1 looks like oil and water is leaking, you could've bumped your other thread other than making a new one.
    My bad, I posted here because the performance guys might have had a different take on the symptoms.

  5. #5
    Michigan sn-95's Avatar
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    Quote Originally Posted by lolzer View Post
    I'm leaning more towards SC seal is gone.

    (Oily water mix.. Looks like baby spew) lol
    So where is the water from?

  6. #6
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    Condensation most likely.

    With that amount of oil, I dare say your IC would be coated enough to prevent corrosion.

    Only way to know for sure is to remove it, clean it up and pressure test the water jacket.

    But oil, yeah, I think you need to pull your SC and give it some love. (Not literally)

  7. #7
    Eric Ocman's Avatar
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    If you had large amounts of water you would not hit 7840. IMO SC seal needs replaced and your IC and tubing needs to be cleaned out. Its more like diluted oil mixed with condensation than water.

  8. #8
    Michigan sn-95's Avatar
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    Quote Originally Posted by Ocman View Post
    If you had large amounts of water you would not hit 7840. IMO SC seal needs replaced and your IC and tubing needs to be cleaned out. Its more like diluted oil mixed with condensation than water.
    Hey Eric, how's it going?
    I did clean out the IC, and pulled the SC too. The air inlet hoses to the SC were just as oily as the outlet to the IC, but neither seemed excessive. I guess I'm most confused by the drop in RPM's

  9. #9
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    Have you still got the oil breather pipe connected to the intake tube (Before the charger?)
    The valve usually doesn't fail, but you could be going through a LOT of blow by, I guess you could test for this by doing a leak down/compression test on the pistons.


    I guess this goes without saying, but air does rush past the SC backwards when you snap the throttle off from full rpm... Getting some back splatter up the intake pipe is quite possible.

  10. #10
    Eric Ocman's Avatar
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    Quote Originally Posted by sn-95 View Post
    Hey Eric, how's it going?
    I did clean out the IC, and pulled the SC too. The air inlet hoses to the SC were just as oily as the outlet to the IC, but neither seemed excessive. I guess I'm most confused by the drop in RPM's
    Going great bro, How does your oil look? Have you rode it since you cleaned it all out yet?

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