Lake fun today

[ROCKERDAN]

I said this awhile back, cant we just drill a tiny pinhole in the filler cap or something? That would stop pressure from building up?

Or am I missing something here, wont that work? Or would it spit out bigtime when riding?

 

[DennyTuna]

This is really good info. This is my first 4 stroke and the info from the awesome TY folk has me feeling like I know my sled in and out, like I've been riding 4 strokers for 15 years. Gives me confidence as I leave this coming Friday to the UP for a week.

 

[Joe ltx-le]

Again guys that are removing the valve, it's a fire risk. Your doing it at your own risk.
Whether I did it myself or not it's not recommended

 

[KnappAttack]

During a rollover what exactly does the valve do?

If you shut down engine, the valve will close. If the engine runs while upside down or on its side, the pressure in the tank holds the valve open and it floods the intake with oil and pumps it thru the engine anyway. The plunger is spring opperated and opens when the pressure is high enough in the oil tank to open it and overcome the spring loaded plunger.

Ski-Doo has a real rollover valve on the valve cover of the 1200, if the machine overturns a check valve positively shuts the vent up and no oil escapes whether the machine runs or shuts down.

 

[KnappAttack]

Again guys that are removing the valve, it's a fire risk. Your doing it at your own risk.
Whether I did it myself or not it's not recommended

I'm not sure where the risk lies other than oil draining out of the tank, which it does anyway when the seal on the tank is compromised.
We pulled my buddies RR in the shop yesterday and we noticed he had almost no oil in the tank because they were riding up north in the cold temps over the last few days.

If nothing else just plug the line to the turbo intake tube and run another vent line up and down to the right running board bypassing the so called factory "roll over valve" which does not shut off anyway if the engine continues to run if upside down or sideways.

I don't see any issues re-engineering this to work without the roll over valve or find something to work properly in its place.

I'll show some pictures her shortly on what I'm going to do to correct it, because I've already sealed my tank one and don't want to do it again. I'll be installing a proper valve from a ski-doo 1200 Rotax.

Hard to imagine Yamaha can't get this right. Maybe it's Cat engineering, what ever it is it's a lame and incorrect valve to have in this application.

 

[fourload]

I said this awhile back, cant we just drill a tiny pinhole in the filler cap or something? That would stop pressure from building up?

Or am I missing something here, wont that work? Or would it spit out bigtime when riding?

What about a tiny hole in the plunger or would that throw the operating pressures off?

 

[Joe ltx-le]

There is already a new valve you can buy. It's electronic , tether operated

 

[Joe ltx-le]

I'm not sure where the risk lies other than oil draining out of the tank, which it does anyway when the seal on the tank is compromised.
We pulled my buddies RR in the shop yesterday and we noticed he had almost no oil in the tank because they were riding up north in the cold temps over the last few days.

If nothing else just plug the line to the turbo intake tube and run another vent line up and down to the right running board bypassing the so called factory "roll over valve" which does not shut off anyway if the engine continues to run if upside down or sideways.

I don't see any issues re-engineering this to work without the roll over valve or find something to work properly in its place.

I'll show some pictures her shortly on what I'm going to do to correct it, because I've already sealed my tank one and don't want to do it again. I'll be installing a proper valve from a ski-doo 1200 Rotax.

Hard to imagine Yamaha can't get this right. Maybe it's Cat engineering, what ever it is it's a lame and incorrect valve to have in this application.

I don't disagree. But we can't go telling people to eliminate the valve and then someone's sled catch fire.

 

[KnappAttack]

What about a tiny hole in the plunger or would that throw the operating pressures off?

Drill a hole or take it right out of the system, makes no difference. the thing is you don't want or need pressure in the tank, its the reason the poor seal blows out in the tank.

The whole tank seal and valve is a terrible design in the first place.

If I'm taking the valve out, I'd just run a loop of hose up a ways and right back down to the right running board and exit just below the running board. I did this on all my 1200 turbo Doos. Can keep an eye on blowby too and the condensation, oil mist and exhaust byproduct runs out the hose and not into the turbo intake.

Want to reduce power on an engine? Let a bit of exhaust into the intake, that's basically whats happening here anyway routing the blowby into the intake. Vent it down below the running board and no more exhaust into the intake and a bit more power to boot.

 

[ROCKERDAN]

Ok Mike Post it up, I will run a loop and let her blow off and out....I sure the F**K dont feel like having my tank leak due to pressure. I hate stupid stuff and bad engineering or crap not working right. Lets slap this baby on and fix her our way.

Will be waiting Mike!

 

[XP123]

Ok Mike Post it up, I will run a loop and let her blow off and out....I sure the F**K dont feel like having my tank leak due to pressure. I hate stupid stuff and bad engineering or crap not working right. Lets slap this baby on and fix her our way.

Will be waiting Mike!

I would like to see this also Dan. Why should we have to put up with BS like this? Sounds to me like this is something we may all end up dealing with over time.

 

[Joe ltx-le]

This fix you guys are doing will work to
Eleminate the pressure in the tank, but emissions big fail! The folks in cali won't be happy.

As far as putting exhaust in the intake that's not really the case it's oil vapor from the base. It would not hurt performance. Almost every vehicle in the world recycles the Vapours through the intake of the engine now a days.

Careful side hilling or snow
Banking with a wide open vent line. Lots of oil can come out in a hurry.

 

[ROCKERDAN]

Joe did you remove it altogether? Or just pull the valve out from inside? Pic?

Dan

 

[Joe ltx-le]

Joe did you remove it altogether? Or just pull the valve out from inside? Pic?

Dan

I just removed the valve. The spring and plunger. But again I can't recommend doing this. If your in deep snow messing around or off trail the chance of roll overs goes way up

And you better bring oil with you because you'll loose the entire tank quickly

 

[KnappAttack]

This fix you guys are doing will work to
Eleminate the pressure in the tank, but emissions big fail! The folks in cali won't be happy.

As far as putting exhaust in the intake that's not really the case it's oil vapor from the base. It would not hurt performance. Almost every vehicle in the world recycles the Vapours through the intake of the engine now a days.

Careful side hilling or snow
Banking with a wide open vent line. Lots of oil can come out in a hurry.

It's totally putting exhaust gas into the intake.
The pressure being produced is blow-by past the rings from combustion, hence its exactly exhaust being put into the intake and hurt a bit of power.

Not to mention the oil vapor going with it will coat the intake tract. I prefer my intercooler & intake oil free over doused with oil.