06 Apex Gas in oil

[Pstn head]

I just thought I should throw this out there, If and when you clarify the reason gas is getting in your oil be sure to change your oil and filter and remove all gas from your oil. The gas will wash your crank bearings amongst other things and you'll score them. Resulting in possible oil pressure loss, and rebuild.

 

[Smokum]

I just thought I should throw this out there, If and when you clarify the reason gas is getting in your oil be sure to change your oil and filter and remove all gas from your oil. The gas will wash your crank bearings amongst other things and you'll score them. Resulting in possible oil pressure loss, and rebuild.

Right - that is part of why I changed it half way though last year and also the reason I want to fix this issue as I know it will wash the bearings out eventually.

Someone questioned trailering it with the gas on and maybe that was filling the crank case? I was under the assumption that was only possible with carb'd sleds and not fuel injection. Anyone have any thoughts on that?

 

[TBay Sledhead]

Not very likely with EFI if even possible.

 

[thor452]

have you checked compression and leak down yet? dead cylinder would do it for sure can be hard to tell with three others taking up the slack.

 

[Smokum]

have you checked compression and leak down yet? dead cylinder would do it for sure can be hard to tell with three others taking up the slack.

I have not done a compression test yet. I will have to tear things apart further to do it - if it was as easy to do as it is on my RX-1 or any other older sled, that is the first thing I would have done.

 

[Smokum]

Well, completed the compression test last night. Starting from clutch side, I had 180, 180, 172, and 180. From what I've read, those numbers should be in check and close enough for that to not be the issue. So good news that no motor work is in order, but still no progress to finding the issue.

Had someone else suggest checking TPS setting, and MAP sensor, Temp sensors, etc. Anyone know how one would do that?

 

[thor452]

have you done a leak down test that one at 172 thou its in spec worries me a little bit.

 

[Smokum]

Over 1000 miles now on sled since last post on things, so figured I would update. After picking Travis from BOP's brain, he suggested I call Chris @ Schmidt Brothers motorsports. Chris suggested the following based on a Phazer he had pretty much the same issue with and this had solved the problem. We drained the gas tank to pretty much empty. We then dumped a whole bottle of Evinrude/Johnson/BRP 2+4 fuel conditioner in the tank and turned the sled over (it actually fired but shut it off right away). We left it sit for 3 days so that the solution could sit in the fuel system and work it's magic. After the 3 days we re-assembled everything that was apart, and made sure to note exactly where the oil level was on the dipstick and rode it, checking it after each ride. After 800ish miles last year, the oil level had actually lowered a small amount.

When we did the oil change this fall, the oil looked and smelled as normal. Have a few hundred miles on this year so far and had to add a little oil again, so I believe the problem is solved. The sled runs excellent!

I guess we'll never know what exactly the culprit was, but I personally thinking it was a slightly hung open injector, as that seems to be about the only thing that didn't get replaced or checked and makes the most sense of how fuel would get in. Thanks to all for your input!

 

[FlyinA]

If you had a slightly hung open injector, a look at the spark plugs might be the only way to verify. In thinking about your original post, where it takes hundreds of miles for the oil level to increase, that's a VERY slow accumulation. Let's say half a quart or a quart over several hours of riding. Totally agree with the fuel system cleaning, but a plug check first could help verify if and how bad/how long a rich condition persisted. And new plugs might be in order as well.

If it's a sticky injector, simply adding Sea Foam to a tank of gas might clear it up. In this case, using a bit more than the label recommends - maybe a full 16 oz. can to a full tank of gas. Run it that way for 1/3 to 1/2 tank, refill with gas only, and run till empty. Sounds too simple, but I've solved a lot of fuel system issues with that stuff and it's available everywhere. Cheapest at Fleet Farm typically.

 

[Smokum]

Thanks FlyinA. My last post was that we solved the issue with fuel conditioner. I also posted earlier I replaced the plugs. All good now. Just wanted to update the thread in case someone in the future has the same issue.