Valve Adjustment

FGATORFAN · Aug 20, 2002

I have a YM2000BD and I am planning on adjusting the valves and I need a little info. What type of gasket does the valve cover use? Is it reusable? And if not where can I purchase one? I have been watching and reading post for awile and I decided it was time to get involved. Thanks for all of your valuable info.

Reid

Inspector507 · Aug 20, 2002

Reid,
Welcome to TBN /w3tcompact/icons/smile.gif

Jerry

kayssupply · Aug 21, 2002

The models I have worked on had an O-ring for a gasket. I used the old one. I cleaned it off, trying not to disturb it in it's groove on the valve cover. Then I apply a very thin coat of silicone gasket maker. I have had very good results. Of course it is aways better to replace it if you have a new one.

From another Reed

EFC · Aug 21, 2002

Do you want to adjust the valves to learn how to do it or is your engine giving you an indication it needs it?

FGATORFAN · Aug 21, 2002

I have 660 hours on it and just thought it was about time. I have not noticed any signs that the valves need adjusting.

Reid

dwynn · Aug 21, 2002

A little P.M. does not hurt nobody if it runs it get tight or lose. valve adj.that is
Don Wynn

EFC · Aug 22, 2002

It probubly wont need an adjustment for a few thousand hours or more. But if you have the time and want to sharpen your skills then have fun /w3tcompact/icons/grin.gif

roger_scotty · Aug 22, 2002

The tricky thing about adjusting the valves is that you have to rotate the engine to get each one to its loosest point. Remember that a diesel can and will start up by simply rotating the crank. So be careful.
I set mine in the time-honored fashion....checking or setting the intake valve when that cylinder's exhaust valve is just beginning to open and the exhaust valve when the intake is just closing. This avoids cam profile overlap as well as any silencing ramps and automatically puts you at the point of maximum clearance. It also avoids the need to find the compression stroke. Every 4 stroke engine I've ever seen can be set using this method.
My feeling is that any engine new to you should have the valves lash checked. If it is only a thou or two off, then resist the urge to get it perfect....just let it be. Do set the compression release clearance at the same time and lube that mechanism. Check it again in a decade or so.....