So, the machinist is ready to start putting the block together again, but he needs me to get... oil bypass valve...

I can't find this part and I was wondering if maybe it has a different name.

 

He can't get it? Machine shops are usually the best way to get engine parts... I imagine he's talking about the ball on the block, just under the oil filter.

 

Yeah, that's pretty much it.

No, their vendors don't have many ZX block parts. They coudn't even find the pistons, but that's ok I'm getting piston sets from Black Dragon Auto.

Sad thing is, I don't even know how that thing looks like.

 

its either one of these..

http://motorcycleinfo.calsci.com/Ima...backValves.jpg

http://vettes.com/PartsImages2/Engin...Filter5662.gif

http://www.peterverdonedesigns.com/i...20Filter/4.jpg

 

Thanks for those links, but I think I'm going to pass by the machine shop and take a look at the part.

 

If it's the filter bypass you can ask him to tap it and plug it. Honestly, do you plan to run the same filter for so long that it becomes clogged? Cause thats the reason it's there: to bypass the filter when it becomes clogged up (for whatever reason).

 

Ok, you lost me there J, can you explain a bit more?

 

Theres an oil bypass valve in the block right where the oil filter screws on (with the filter installed you cant see the valve). This is meant so that if the pressure gets too high (from say, a clogged oil filter) the valve will open and bypass the filter. You can remove the valve assembly and have the hole tapped and then install a plug. The only time this valve actuates is when the filter clogs and is unable to pass oil. But as long as you do regular filter changes then it's a non-issue.

In your case I'd go which ever route end up being cheaper.

 

Ohh, well...like the oversized pistons I can't find this piece either.