Polaris RZR Forum - RZR Forums.net banner

compression test

1 reading
22K views 16 replies 9 participants last post by  6.7powerstroke  
#1 ·
Whole story, had service at dealer, new air filter, rode Ocala national forest, checked air box had a little sand in it. Changed to Uni filter and went to durhamtown and adventure world for a few days. Machine developed an odd noise so when I got back took it to dealer and requested a compression test and fix whatever is wrong. Replaced front prop shaft under extended warrenty, also 8 bushing on A-arms. Compression test showed 90 lbs, specs say ok if between 80-120, will take in and have retested in 14 hours before trip to HM. I know nothing about compression so I don't know if thats a sign its going bad or if it could be normal. Any comments from you guys that know something about this? I realize it is in specs but it is on the low end.
 
#5 ·
Keep an eye on oil level. Recent poster got dirt/sand in airbox/top end, ruined piston rings, it ate all the oil without smoking (synthetic doesn't smoke, apparently) and froze the engine out on the trail.
 
#7 ·
The 570 has a decompression assembly and will show lower values on a compression test than most are used to seeing. A more definitive answer would be found with a leak down test....

Nate
Alba Racing
 
#8 ·
#11 ·
I have a 09 RZR 800 that drinks oĂŻl a lot. I checked the compression yesterday and the result is 150 on one side and 180 on the other. There's no oĂŻl leak on the engine and does not seem to smoke. Don't know what's wrong. Could someone help me with this issue. Someone told me it could be a valve that's too tight and need to be ajust, is it possible? Thanks.
 
#13 ·
I have a 09 RZR 800 that drinks oĂŻl a lot. I checked the compression yesterday and the result is 150 on one side and 180 on the other. There's no oĂŻl leak on the engine and does not seem to smoke. Don't know what's wrong. Could someone help me with this issue. Someone told me it could be a valve that's too tight and need to be adjust, is it possible? Thanks.
Cylinder Compression on 800
800: 150-170 PSI
800 HO: 165-185 PSI

Valve adjustment is a possible fix. Need a mech to look at it; this is the 570 forum so limited help here except from Nate at Alba racing and some who own both and are mechs.

We have had some with dusted engines tell us that the synthetic oil goes out the tailpipe without smoking.
 
#12 ·
My 570 tested at a 110 after I found dirt in the airbox. The gauge I had to borrow wouldn't hold pressure, so no leak down test though.

From what I've read just on this forum, there's no guarantee just changing to a UNI filter will solve all your dusting problems.
 
#15 ·
Great news!
 
#17 ·
DIY snorkel kit. Ever since no dust in box! Plus insurance while crossinwater