Thread: 2008 rxp-x compression
07-18-2013, 04:27 PM #1
2008 rxp-x compression
recently an Intercooler leak...tested compression today after doing all the necessary flushes and cleans it was 120/105/120 cold engine...hoses to throttle body and supercharger are off...replacing to riva gen3....whats the opinions of everyone.....i'm worried about that middle cylinder. 70 hrs on ski
07-18-2013, 04:34 PM #2
center cylinder is definitely low and the other two are low as well but that may be because your cam timming is at full retard. Easiest way to determine whether you have a (cylinder,valve,seat, issue up top or A issue down low, piston,bore, rings etc) is to squirt a little oil in that cylinder if your compression goes up look down if the compression stays the same look up. All else fails run a leak down test on that cylinder
07-18-2013, 04:41 PM #3
Those are low, I just did my 200 hour RXP and they were all at 150, ok so 147, 150 , 149
Not good and with the center that low, it's time for some help
07-19-2013, 06:32 AM #4
should i put the plugs in it and start it up....and then do it again...it hasn't been driven in 2 months....or you think i should sell stand walk away as i don't drive em nearly enough....ANYONE WANT IT to do a rebuild block is still good still runs just needs a rebuild and i do not have enough time to do it and ride it.
07-19-2013, 07:26 AM #5
Are you in Florida? Did you add some oil in the low cylinder?? I mean do you want to know where the problem is?
07-19-2013, 10:58 AM #6
Been a few years, but seem to remember guys having piston ring problem with the 08 X skis.
07-19-2013, 02:04 PM #7
All compression guages read different #'s.
It could be a carbon build up on the valves that are causing that 1 cylinder to read low.
I'd run it and see if you notice a lack of power.
These skis don't like to sit.
07-19-2013, 02:05 PM #8
Leak down test is best way to see if you have issues.
07-19-2013, 02:12 PM #9
Most of the time sometimes It can throw you in a loop. I did a bore scope on a zero compression cylinder I seen no holes on pistons, I did find a couple Pieces of the valve seats and a valve stuck Open. Glad I pulled the block on this one
07-19-2013, 03:04 PM #10
Have around 130 hours I think and mine are all 130 to 140
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