VES Valve Assembly - Snowmobile Forum: Your #1 Snowmobile Forum

**BC_Dan** · 11-03-2009, 12:39 PM

There have been a few guys asking about cleaning the VES valves on Polaris sleds. I looked in some of my pics and have these to share...

First off, there are two bolts holding the VES valve assembly to the cylinder. Remove those and remove the valve body. If you're careful, the gasket may stay intact. Have two gaskets on hand in case you're not lucky.

Here's what the valve will look like on your bench...

Remove the two remaining bolts. Inside will be the bellows and a spring. The spring side of the bellows should be clean, the underside will be coated with very dirty oil.

Remove the valve cap from the guillotine. I find wrapping the guillotine in a towel and putting it in a vise to hold it works well. That should leave you with all the parts disassembled.

Clean all the parts, replace old and worn bellows and springs

Assembly will be continued

**RJ Gleason** · 11-03-2009, 12:43 PM

Linked to How To thread.

xxxthebxxx · 11-03-2009, 12:47 PM

Very nice post I'll have to inform my Dad about this.

**BC_Dan** · 11-03-2009, 01:05 PM

Insert the guillotine valve into the housing, and align the washer, bellows, and cap. Lightly coat the bellows with fresh oil Use blue loctite on the threads, and torque the bellows cap to about 6-8 ft. lbs. DO NOT OVERTORQUE.

Install the correct spring onto the bellows cap, install cover using two bolts. Use blue loctite, torque 4-6 ft. lbs.

These guillotines are the newer stainless steel parts, you can see the hollowed areas that help reduce the weight of the valve. If your valve has these intents, they are not aluminum.

Insert the valve back into the engine. The guillotine is eccentric, it will only go in one way. Do not force it! Using blue loctite, torque the longer VES housing bolts 9-12 ft.lbs.

A few more notes...

There are different ways to clean the guillotines. If you scrape the carbon off, be very careful not to scratch the guillotine. A green scotchbrite pad works well after removing the majority of carbon build-up. The steel valves are a lot more robust and do not damage as easily as the aluminum ones. Some guys have had success using oven cleaner to get rid of the carbon, I have not tried that, but it may prevent damage to aluminum guillotines.

If you do not need to replace bellows or springs, you can remove the bellows assembly and clean the guillotine without completely disassembly. The guillotines do not need to be spotless; removing the majority of the carbon and making sure they are smooth will ensure proper operation. I still like to disassemble mine to ensure there are no holes or damage to the bellows, and that the spring is intact.