I bought a 2010 GTX 155 the other day and immediately noticed there was no coolant. I pulled the plugs and there appeared to be a little bit of a green liquid on them (my guess was coolant). I let the ski turn over without the plugs and nothing shot out. Inside the coolant tank, there’s some black flakes which makes me think the head gasket blew. I filled the coolant and put the plugs back in and ski starts immediately everytime and no faults on the screen. I also ran compression today and got 140,130,130. Are these numbers ok and is there anyway to know whether I for sure have a blown head gasket? I don’t have a cylinder leak down tester but did buy the coolant pressure tester to see if there’s leaks. Thanks in advance.
-
This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.
Seadoo GTX 155 compression & head gasket
- Thread starter Edwinh12
- Start date
skiasylum
Well-Known Member
No official compression numbers from Seadoo just less than 10% difference between all cylinders. The leak down test is the normal next step with values published in service manual. White smoke and milky oil are other clues. There is a coolant head gasket leak tester that changes color if it detects exhaust gasses in the coolant system. If a spark plug looks washed compared to the others is another clue. Good excuse to buy a squiggly boroscope to inspect each cylinder also.
Oil looks completely fine and I haven’t noticed much white smoke at all. I’ll start it up again later and really pay attention. I can’t find anyplace around me that will rent out a cylinder leak down test tool. Trying to avoid paying $100+ for one to only use it once. All spark plugs looked the same and just fine. I may have to try the gasket leaker test, I believe autozone rents those out.
Similar threads
- Locked
