800 CFI's... look at this, might be on to something
- Thread starter diamonddave
- Start date
Update...Forgot to
After bleeding this out twice last spring, I have had the oil bubble return in the main line and in the same line pictured above the oil pump. I am convinced this is a cap/vent issue.
With the sled sitting on the floor in my garage, I removed the oil line from the pump and nothing would come out. I waited for a couple minutes and when I unscrewed the oil cap, the oil came a rushing out.
It just makes me wonder how many others out there have this issue and don't know about it.
After bleeding this out twice last spring, I have had the oil bubble return in the main line and in the same line pictured above the oil pump. I am convinced this is a cap/vent issue.
With the sled sitting on the floor in my garage, I removed the oil line from the pump and nothing would come out. I waited for a couple minutes and when I unscrewed the oil cap, the oil came a rushing out.
It just makes me wonder how many others out there have this issue and don't know about it.
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xc6rider
Well-known member
I'd just replace the cap and the filter to start over new with those items and see how it works. If you continue to have problems, just install a ventline kit using PWC parts...
Part #'s 1, and 4
http://www.polarispartspitstop.com/pages/parts/viewbybrand/14/Polaris.aspx
Part #'s 1, and 4
http://www.polarispartspitstop.com/pages/parts/viewbybrand/14/Polaris.aspx
this is scairy. in will be checkin my D8 asap.
09 D8 same bubble. Dealer replaced oil/fuel filter every year since update!
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tjmcc
New member
just a thought. The vent cap is plugging pulling a vacuum on the oil tank so it will not allow oil to flow anymore but where is the air coming from? I would guess the connection at the pump maybe, The pump would keep sucking until the pump suction vacuum equalized with the tank vacuum then it could suck air in one of the connections on that line, say at the oil pump. The air would raise in the line most likely until it reached the filter.
I say the connection at the pump only because that connection on the filter in the picture looks pretty solid. Doesnt look to me like it would leak easily. Even so better venting of the tank would prevent this all together.
just my 2 cents. My sled is in getting the pto side replaced.
I say the connection at the pump only because that connection on the filter in the picture looks pretty solid. Doesnt look to me like it would leak easily. Even so better venting of the tank would prevent this all together.
just my 2 cents. My sled is in getting the pto side replaced.
IF YOU ROLL YOUR SLED AND IT IS UPSIDE DOWN FOR A FEW,WOULDNT YOU GET AN AIR BUBBLE IN THE LINE WHEN THE AIR GOES TO THE BOTTON OF THE TANK? THIS MIGHT BE THE SOURCE OF THE AIR IN A FEW CASES. JUST A THOUGHT
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xc6rider
Well-known member
Yes, but with a properly vented tank, the bubble would work its way back to the top, even with some draw.
Should your sled spend a little time upside down (mine always ends up there at least once a day!) and depending on which way you roll it back, it is likely that it will get air in the line! I have seen air bubbles in the oil injection lines since the 1970 yammi's and have never had an engine go due to an oil problem. There are air bubbles in the oil lines of three of the four sleds in my shop right now! The sled that appears to be bubble free is my daughters 03 escape, it is also the only sled that has it's original hood and or side panels!
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SaskRMK
Active member
I am a victim of this issue as well. I had noticed that my feed line had about 4" of air right below the check valve. My sled has under 1500 miles and who knows how long this issue was happening for. I bled the entire system and the sled sat for 3 days with no air bubbles, went for one hard ride and the next morning 1" of air right below the check. I re bled the entire system before the next days ride and the sled has been sitting for about a week in my heated shop and no air bubbles have appeared. my compression is now 90-115 and my top end has under 700 miles on it...
The destroyed piston is from my exhaust side and i am almost 100% sure this is because of air bubbles in the oil line. The piston is only scored on the one side. Does this look to be failure from loss of oil? I caught this before the engine seized and rode hard all weekend with no issues before discovering the compression. here are a few pictures i had taken when replacing the feed line, these may be helpful to those who haven't checked out this area of there sled before. Sorry for the mess i had some oil down there for leakage/bleeding the system.
Mirror view of the oil feed line
Look at the bubbles in all of the smaller lines after replacing the feed line. I do not know if this happened after i pulled the line or was still there with the old line but either way its pretty scary looking and its 100% why i lost compression. When you bleed the pump this would only bleed the feed line? and not the smaller lines after the pump?
I had a great season with no serious break downs but am more than disappointed with my Polaris at this point.
The destroyed piston is from my exhaust side and i am almost 100% sure this is because of air bubbles in the oil line. The piston is only scored on the one side. Does this look to be failure from loss of oil? I caught this before the engine seized and rode hard all weekend with no issues before discovering the compression. here are a few pictures i had taken when replacing the feed line, these may be helpful to those who haven't checked out this area of there sled before. Sorry for the mess i had some oil down there for leakage/bleeding the system.
Mirror view of the oil feed line
Look at the bubbles in all of the smaller lines after replacing the feed line. I do not know if this happened after i pulled the line or was still there with the old line but either way its pretty scary looking and its 100% why i lost compression. When you bleed the pump this would only bleed the feed line? and not the smaller lines after the pump?
I had a great season with no serious break downs but am more than disappointed with my Polaris at this point.
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SaskRMK
Active member
Did you mean air in the lines? wire the pump open while the sled isn't running?
would this bleed the air out into the bearings/cyc or up through the reservoir?
My top end end is currently off for a rebuild so id like to know how i can be sure
to extract ALL air out the the oiler lines. Im familiar with the bleed bolt at the back
of the pump but need the air outta my smaller lines.
thank you
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xc6rider
Well-known member
You can pull the pump, wire or hold the pump open, and run the shaft with a drill.
Applying a small amount of vacuum on the end of the line may work.
But of course, either of those is going to be a pain in the @ss with the engine in the chassis.
I'd go with the bleeding the pump, premixing the tank, and holding the pump at full flow, and run the sled til it's all bled out.
Applying a small amount of vacuum on the end of the line may work.
But of course, either of those is going to be a pain in the @ss with the engine in the chassis.
I'd go with the bleeding the pump, premixing the tank, and holding the pump at full flow, and run the sled til it's all bled out.
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SaskRMK
Active member
Mine always do get caught below the filter but its probably not worth having your pump ingest something. Very good point though. I will be drilling out the bottom of my oil cap for excess ventilation before pulling over my rebuilt top end.
could you cycles oil threw the smaller feed lines by rotating your primary and holding the throttle wide open? my pots and pistons are off and i'm about to put it back together so i would like these bubbles out before i rebuild.
could you cycles oil threw the smaller feed lines by rotating your primary and holding the throttle wide open? my pots and pistons are off and i'm about to put it back together so i would like these bubbles out before i rebuild.
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