Page 2 of 2 FirstFirst 12
Results 11 to 14 of 14
  1. #11
    This is how I run a jetski shop in the desert nmpeter's Avatar
    Join Date
    May 2008
    Location
    Elephant Butte New Mexico
    Posts
    7,762
    +1
    1,876
    I’d suspect a ring alignment issue or perhaps a measuring error or at worst a cylinder that should have bored to an oversize

    Not likely a machinist would miss that

    Assuming the engine was bored and not just reringed

    Run the engine for a few hours

    Recheck compression. Hot.

    then dump a teaspoon of oil into each jug and measure again

    What exactly was done on the rebuild is the question

    It takes some experience to determine how far you should go

    Rebuilding on budget is always difficult


  2. #12
    Hello, I did a leak down on #2 and felt air coming out of the exhaust. However, I hear air coming from the oil fill cap on all (3) cylinders (leak down). The other cylinders had the higher compression (140psi). Would it be normal to hear some air entering into the crank case?

  3. #13
    This is how I run a jetski shop in the desert nmpeter's Avatar
    Join Date
    May 2008
    Location
    Elephant Butte New Mexico
    Posts
    7,762
    +1
    1,876
    yes, that's why it's called "leak down" in a static mode, air will eventually lek past the piston rings and pressurize the crnakcase, so hearing air is normal.

    to check for a bad valve seat, drop an oz of motor oil into each jug before testing. that will allow you to judge the valves sealing ability

  4. #14
    Great. Will do. Thanks for your help!

Page 2 of 2 FirstFirst 12

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 12
    Last Post: 08-12-2016, 09:23 PM
  2. 2005 rxp timing chain
    By Wilo007 in forum 4-Tec Performance
    Replies: 6
    Last Post: 08-15-2014, 09:11 AM
  3. Rxp 2005 timing chain broke
    By rxpsquad in forum 4-Tec Performance
    Replies: 10
    Last Post: 09-26-2011, 10:38 AM
  4. 2005 RXP ISSUES.....Crap
    By WannabeGoing80 in forum 4-Tec Performance
    Replies: 8
    Last Post: 06-26-2011, 02:13 PM
  5. Timing Issues Slx 780
    By jetman43 in forum Polaris How To & FAQs
    Replies: 8
    Last Post: 08-30-2009, 09:24 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •