Wanted ,Rotary valve oil reservoir

[sioux201 84]

 Any condition as long as it don't leak 

[tcj 150]

CPS new $79.20:  https://www.cps-parts.com/catalog/rtxpages/cps15-03518.php

Ebay used $50:They call it a crankshaft bearing oil bottle but it looks like the rotary valve oil tank: https://www.ebay.com/itm/Ski-Doo-MX-Z-440-Crankshaft-Bearing-Oil-bottle-Tank-Assembly-420956240-Free-Ship/233446534977?epid=1128902043&hash=item365a7f6f41:g:DiEAAOSwlj9eBQSM

Edited 3 Jun 2020 by tcj

[sioux201 84]

ThanksTCJ

i know about Rotax is out rages prices, that's the reason I was looking for a used one, probably end up building my own

[109jb 181]

I've wondered why the rotary valve doesn't just feed and return to the oil injection bottle like Ski-Doo does on the snowmobiles with rotary valves.  I've thought about adding a couple tees in the oil injection hose to feed the rotary valve because mine leaks a little bit of oil there. Feeding from the injection bottle would mean the rotary valve is getting oil as long as the engine is.

[ChrisBolkan 130]

I've wondered why the rotary valve doesn't just feed and return to the oil injection bottle like Ski-Doo does on the snowmobiles with rotary valves.  I've thought about adding a couple tees in the oil injection hose to feed the rotary valve because mine leaks a little bit of oil there. Feeding from the injection bottle would mean the rotary valve is getting oil as long as the engine is.

That's a good idea assuming the oil in the bottle is above the the height of the RV assembly.

[1avidflyer 1983]

I suppose one reason to have separate tanks is if the seals start to leak and you get oil coolant mixing with the oil, it wouldn't mess up the engine as quick.  Not saying this as fact, but it seems reasonable.  JImChuk

[109jb 181]

I don't think that would be an issue. There are 2 seals back to back. One to keep oil  in the rotary valve area and the other to keep coolant out. If the coolant seal leaks I'm thinking the coolant will wind up in the crankcase and won't go through the oil seal for the rotary valve.  Thinking about it though. If the rotary valve seal is leaking, all of the oil from the bottle could wind up in the crankcase.

[akflyer 1427]

I don't think that would be an issue. There are 2 seals back to back. One to keep oil  in the rotary valve area and the other to keep coolant out. If the coolant seal leaks I'm thinking the coolant will wind up in the crankcase and won't go through the oil seal for the rotary valve.  Thinking about it though. If the rotary valve seal is leaking, all of the oil from the bottle could wind up in the crankcase.

lots of documented cases of the issue Jim described.  That one of the main reasons for the ceramic seal on the blue heads.

[109jb 181]

Ah.  Ok. good to know.

[whizzers 35]

I have a couple if you still need one.