Results 1 to 3 of 3
  1. #1

    2002 seadoo 4tec timing chain question

    Hello, I have a 2002 4tec gtx that has broken the timing chain. I did not have this ski when it happend so I dont know the history of it. The chain is broken and there is water in the oil. Other then replacing the timing chain, how can water get into the engine oil on these engines? anything else to check? Compression seemed good at around 150psi. engine is now pulled and pto housing is removed. No noticable problems with the pump for the coolant. Thanks for any help!

  2. #2

    Join Date
    Jun 2011
    South Carolina
    Send compressed air through the combustion chambers while each is on the compression stroke and look for air bubbles in the coolant tank.

    Water and oil usually mix if the headgasket is blown. What does your sparkplugs looks like? Still in one piece? Get a flashlight and look into each chamber and inspect the top of the pistons for damage.

    Compression leakdown test would be a good test to try.

  3. #3
    HORSEPOWER JUNKIE 9secZO6's Avatar
    Join Date
    Jun 2007
    Belle Chasse, La.
    Even if u explain the oil away, I would pull the pistons out and check the top ring for binding. My bet is at least 1 of the top ringlands is bent from valve contact and will not seal, resulting in blowby. I have done 3 timing chains now and pinched ringlands on every one of 'em. I hate giving good people bad news.....

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Does CHECK ENGINE lcd message go away 2002 4tec seadoo???? HELP
    By ericdiver in forum 4-Tec Performance
    Replies: 2
    Last Post: 06-12-2011, 07:22 PM
  2. trying to do the timing chain how do u get off the timing gear
    By gtxforlife88 in forum 4-Tec Performance
    Replies: 4
    Last Post: 07-05-2010, 05:31 PM
  3. 2002 SeaDoo GTX 4Tec 155HP fast NJ
    By ALM MOTOR SPORTS in forum Sea Doo 4Tec Skis
    Replies: 1
    Last Post: 07-22-2009, 10:40 AM
  4. Timing Chain Assembly Question
    By thompsdw in forum 4-Tec Performance
    Replies: 7
    Last Post: 05-10-2008, 05:18 PM
  5. 2002 seadoo 4tec instrument cluster
    By gyroav8r in forum 4-Tec Performance
    Replies: 0
    Last Post: 11-04-2007, 08:05 AM

Posting Permissions

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