Yong Heng HP Piston Seals Compared to AV's

[jking]

I ordered some HP seals knowing they are YH but not knowing the specs just hoping they will be interchangeable. I think (hope) they will work. The AV's are $6.95 each plus shipping. The YH seals are dirt cheap in comparison so I think it's worth trying. The YH's are a little smaller ID but that might be alright since the AV design uses a little spring under theirs to help expand the seals. I think I could go with the YH's and leave that expansion ring out. Be nice to get to eliminate one more piece that might sometime cause serious problems. Here are those expansion springs, very thin and fragile.

Spec wise the AV's measure (in mm's) 2.95x10.1x7.9x1.15, the YH's, 3.03x9.97x7.6x1.24. The YH's being a just a tad taller and a little thicker. The tallness could be reduced easy enough with sand paper. They are also the split ring style.

Jking

 

[cootertwo]

Very interesting, keep us informed..... and links to where you made your purchases would be nice....

 

[Hajimoto]

Thanks for sharing your discoveries.

Your efforts will pave the way for the rest of us

 

[Eaglebeak]

The Yong Heng uses O-rings as ring expanders. I assume that the YH piston has deeper grooves. I know that the 3 and 4 ring pistons have slightly different dimensions and are not interchangeable. Let us know if you can make them fit. Has anybody tried using the split type rings in the YH?

 

[jking]

I was going to share a link to the rings/seals but I don't think the seller is still active. The seller went by txfactory on ebay. I think I mis-spoke about them being for YH. After looking at my order I believe these were actually Tuxing (thus txfactory) seals. Kinda makes sense with what Eaglebeak was saying about the YH using a O-ring as a ring expander. Sorry for any confusion.

Jking