Rotary valve and cover

[cncsignman]

Hey guys! Getting ready to install a new SBT 717 engine. I'm concerned about the condition of the rotary valve cover and valve. It doesn't feel like there are deep grooves just light scratches. I am concerned about the gouges on the edge of one of the ports though. Also, is the valve supposed to be completely flat? You can see in the photo that one side of the valve is bent up slightly. Is this correct?? My gut tells me to order all new cover and valve. What do y'all think? Thanks.

 

[cncsignman]

 

[Ankeneyou]

You will be fine with the cover, but I would put a new rotary valve in.

 

[cncsignman]

Even with the gouges at one of the holes?

 

[Ankeneyou]

Yes, they appear smooth and if there are no major gouges In the rest of the cover it will be fine for a stock 717. In the shop manual there is a wear measurement for the RV cover bit from the pics I think you are fine.

 

[cncsignman]

K thanks. Will definitely get the new valve.

 

[Chester]

That cover looks worn out too. Can you feel a ridge around the edge of the RV cover surface? Make sure you check the clearance.

Chester

 

[Lumps]

What is the purpose of the seagull shaped indentations?

 

[cncsignman]

That cover looks worn out too. Can you feel a ridge around the edge of the RV cover surface? Make sure you check the clearance.

Chester

They are more shallow scratches. Nothing deep. Can the surface be honed down? My son works at a machine shop. Only concern is the gouges on either side of one of the holes.

 

[Chester]

Is there a lip around the outer edge of the surface near the ports?

Chester

 

[cncsignman]

Is there a lip around the outer edge of the surface near the ports?

Chester

Yes it is. surface is raised then drops down to the seal around the cover.

 

[Chester]

It will have to be resurfaced then. Make sure the machinist also machines down the mounting surface and the O-ring groove to bring the clearance to .012" +/- .002".

Chester