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Does anybody have the part number for the ski doo rubbers?
Some facts we all should be able to agree on. If the Polaris cap, which isn't a new design was flawed or in other words designed to not provide enough venting in the real world then I think it's clear with the thousands of PRO sleds on the snow there would have been MANY engine melt downs due to oil starvation. The PRO has been on the snow with the same oil cap going on 5 years. There are engine failures for sure, but look though the voluminous threads on the subject and you will find it hard to find any topics which indicate a lack of oiling as the reason for PRO engine failures. Yes, what started this debate was the claim by some that the cap caused engine failures, but I have not seen any real proof of that.
So the issue I think is, does the cap sometime stick. Would someone do some real world testing that shows that the ball valve in the oil cap sticks under any conditions. Just saying it did doesn't mean it did! I will change my mind if anyone can show any proof of a cap failure and a real reduction of oil sufficient to cause a engine malfunction or problem.
I think what would be easier is for you to explain what your factual theory is to explain all the engine failures on the pros.
Tony was the sled sitting flat on the ground?
I've done this same test on 3 different sleds and zero oil come out with a completely stock cap. Sled sitting on shop floor. The only way oil would come out was having to shake the sled.
We do not get the following with modified caps/vents anymore. Oil usage went up on these same 3 sleds without oil pump adjustment.
Off topic.
How much oil flows ocnce the vent is open in the Polaris cap?
TRS has taken the time to provide more info, I appreciate his effort. My first observation is this, that much oil in 45 seconds. Take the least amount, the Polaris, that amount of oil in 45 seconds... multiply that by several hours of riding. That would be gallons of oil, way more than required for adequate oiling. Even under extreme flow rate periods it would seem that there would be more than enough oil to get the job done. Imagine the amount of oil in 45 seconds under pump vacuum, (more real world) instead of just gravity. IMHO this tests shows that all of the options provide more than enough oil. So this seems to be, does the Polaris cap vent well enough to provide ample oil... yes, but does it stick? Still not proof of that for me.
Thanks TRS.
Sitting on the shop floor, level.
The PI cap did not stop flowing oil until after 29sec. then went to a drip. I preformed the test with the tank and oil cap on my 2012 PRO. I did test the PI cap twice, the 17ml was the best. I was scratching my head with the flow rate.
TRS has taken the time to provide more info, I appreciate his effort. My first observation is this, that much oil in 45 seconds. Take the least amount, the Polaris, that amount of oil in 45 seconds... multiply that by several hours of riding. That would be gallons of oil, way more than required for adequate oiling. Even under extreme flow rate periods it would seem that there would be more than enough oil to get the job done. Imagine the amount of oil in 45 seconds under pump vacuum, (more real world) instead of just gravity. IMHO this tests shows that all of the options provide more than enough oil. So this seems to be, does the Polaris cap vent well enough to provide ample oil... yes, but does it stick? Still not proof of that for me.
Thanks TRS.
My 600 RMK is spec'd with a 3 quart oil capacity which is 2838ml. The test showed 17ml of flow with the stock cap. That works out to 22.6ml per minute or 1360ml in 1 hour. The tank would be drained in a bit over 2 hours so the stock cap flows just fine as the oil pump is getting plenty of oil.
I'm not saying there isn't a problem with the stock cap but I've not had any issues on either of my pro-ride sleds. I've never had an situation where I've opened my cap and found the tank under vacuum. The BRP cap may or may not be a better design. I think if I get really worried about this issue (I've been following oil cap threads for about a year) I'll get a separate hose and fitting and vent the tank old school like an 80's Indy. What was a hassle about that system was the oil ran out of the hose when you placed the sled on its side. I'd then have to plug the hose and one time I forgot to remove my plug and fortunately caught it in time before burning down. The tank was under vacuum and the sides were slightly sucked in.