Exhaust Valve maintenance

[cowill2]

does any one know of a good link or possibly prior thread concerning exhaust valve cleaning on the dragon (07 700). I've heard this is a fairly simple task...just want to make sure i'm doing things correctly.

 

[skibreeze]

Really nothing to it. Pull them out and go to town. I just did mine on my 600 the other day. I have used a razor, wire brush, and a small flat blade scraper to scrape off all the carbon on the valve. I also scraped some carbon off of the block, but you need to be very careful to not gouge the alum. block or let the gunk fall into the motor. I used safety wire to clean out the small passage ways that lead to the bellows side. Make sure that the bellows aren't torn, throw on some new gaskets, re-locktite the bolts and you are GTG.

 

[Kraven]

EXHAUST VALVE MAINTENANCE

does any one know of a good link or possibly prior thread concerning exhaust valve cleaning on the dragon (07 700). I've heard this is a fairly simple task...just want to make sure i'm doing things correctly.

There's a thread about it under INCREASING YOUR IQ at the top.

Please keep in mind that the aluminum valves have a hard coating that you don't want to remove, so careful when you scrape, and I would avoid the wire wheel.

Don't forget to take a shop rag with a little Brake-Clean/ Lacquer Thinner wrapped around a 1" or so wide scraper and wipe/clean the goo out of the exhaust valve bores.

Check for rips/tears in the bellows as SkiBreeze mentioned.

I personally do NOT use Loc-Tite on the bolts, I.M.H.O., do all of my own wrenching, NEVER came back to a loose bolt on the exhaust valves. With the bolts in/out quite often I just feel that with the Loc-Tite, you run the chance of "galling" the aluminum threads in the jugs, I.M.H.O.

Hope this helps!

 

[Ron]

Exhaust valves have been stainless for years and stainless replacements are available for some older models. Not sure of the change date maybe 06.

 

[05900]

Usually helps to break the bellows nut loose with valve in bock to contain torque and prevent ripping a good bellows. No loctite needed when reassembling...never found one loose since the first VES motors.