rzr using oil

I have a 08 rzr and i noticed the breather on top of the valve cover was leakink oil so i replaced it with the aluminum one and it dont leak now, but still didnt fix my problem I have to add almost a quart of oil every couple of hours of riding. It dont smoke at all and runs great, but I have been noticing oil in the bottom of the air filter box but not a quart of oil, so where could it possibly be going? and where is the oil in my air filter box be coming from?

sounds like the rings are gone

wouldnt it smoke? or have power loss?

andrewn5998 wrote:

I have a 08 rzr and i noticed the breather on top of the valve cover was leakink oil so i replaced it with the aluminum one and it dont leak now, but still didnt fix my problem I have to add almost a quart of oil every couple of hours of riding. It dont smoke at all and runs great, but I have been noticing oil in the bottom of the air filter box but not a quart of oil, so where could it possibly be going? and where is the oil in my air filter box be coming from?

check your breather hose comming from the top of the valve cover to the air filter....take off one end and blow thru it.....

Oil Filters are know to come loose and leak , if you are loosing a Quart in several hours of riding it would smoke ... I think you have a leak . A compression test is the true way to tell if you need a rebuild .

Synthetic oil doesn't smoke much to begin with and then when the rings go it seems to just let it go in puffs of smoke that you don't notice ... even people riding behind you don't notice. Bobby D's ring gap was supposed to be ten thousandths & it was 100 thousandths. Still ran good but burned all kinds of oil ... seen this on several now.

what should the compression be on each cylinder

Anywhere between 150 P.S.I. and 200 p.s.i. is considered good. A cylinder leakdown service limit is 15%. Personally, i would be prompted to consider 10% as being too much.
As soon as i get the time, i'll be rippin mine apart to fix as well.

If you have readings on each of your cylinders that are drastically different but yet within specs., i would be concerned as well . They SHOULD be close to the same if you have similar wear on each cylinder.

I never did a compression test on a a twin cylinder what is the best way to do it, hook the compression tester on on cylinder and unplug the plug wire on the other cylinder? since there is no kill swith on the rzr

Step 1:Prepare for the test by warming up the engine

Step 2:Remove all the spark plugs from the engine after turning it off.Be sure to disable the ignition system to eliminate the possibility of electrical shock while performing the compression test.

Step 3:Place the compression tester into one of the spark plug holes and crank the starter so that compression builds in that cylinder. Write down the compression number and continue to the next spark plug hole. Repeat the procedure for each of the cylinders, recording each number.

Step 4:Compare the compression numbers to manufacturer specifications.

Step 5:Evaluate the difference between the recommended compression ratio and the test results. An ideal reading falls within 15 PSI of the recommended number. The numbers should also be within 10 PSI of each other. Retest any cylinder with a low reading.

Step 6:Add a tiny amount of motor oil to the cylinder that shows a low reading before running the compression test again. If the compression number is higher than the first, the cylinder has worn cylinder walls or piston rings. If the number remains the same, there are worn valves or valve seats

Make sure all areas around spark plug holes are very clean so no dirt gets in the cylinders while performing this test.

Also make sure while your doing the test that you have the accelerator pedal blocked in the Wide open throttle position.

A compression test is a good measure of health/wear of the cylinders but it can't tell you where a problem is. A leakdown test is a diagnostic tool to locate a leak. By using compressed air you can listen for leaks at the intake (TB) & exhaust (muffler) to isolate valve problems. Listen to crankcase (oil fill) for leaky rings or valve seats. You can watch for increase in water level or bubbles, or air escaping into the adjacent cylinder that indicate a head gasket leak.

You really don't need to perform a leak down test though unless you fail your compression test of course.

checked the compression today and one cylinder had 85 and the other one 90, so i pulled the exhaust off and there was about half a quart of oil in it, then I pulled the top end and found one ring was broken and half gone and on the other piston the oil ring was stuck all the way in. my pistons still look good so i might just order rings but im not sure if my piston is stock bore or not, the only number I can see is 73-006 on top of the piston. i was looking at wiseco pistons and I can get them at different compression ratios, what is the factory piston ratio and what is the highest I could go and still run pump gas if i decide to do new pistons too.

11:1 is high as you can go on pump gas . Stock compression is around 9:1

I am a engine builder around here........You can run as high as 11.5-1, but you will have pre-detonation, and "pinging" at higher RPM's.