rxseven

Has anyone resurfaced side housings without sending it off to get lapped? If so, I want to know how and with what results.



All input will be greatly appreciated.



Darius

13BAce

Here's what some people do:

They take off the stationary gears and rub the side housings together, using valve grinding compund. It works well.

Rotarydragon

Intresting idea Ace, never would have thought of doing it. I take it you've done it?



I used to polish various parts with toothpaste.....

13BAce

You rub the plates together so that you keep the surface flat. If you just went over them with sandpaper you might make the surface a little too uneven for the side seals.

Rotarydragon

Cool once I get to the point that I rebuild one of these things, I'll give that a shot.



Kinda scared to do it tho, figure a rebuild kit is just shy of what it costs to have one done or at least done cheaply. Still I'd like to try my hand at it.



Plus I'd try to avoid buying a cheap rebuild and pay the extra for Mazdatrix as they know what they're doing and will stand behind their work.

13BAce

It's always a good thing to try, but if you're not too confident a good rebuild is a good option. Mazdatrix rebuilds are a little more than most, but their rebuilds seem to be very good since they use ALOT of new parts and resurface the housings, etc.

rxseven

That is a good idea of rubbing the plates together but how much is enough? I was reading up on lapping and it is basically done with a very flat iron plate and lapping compund and moving it in a figure 8. The lapping machines work on the same principle. On the same lines, the FSM says to clean surface with extra fine emery paper. What grit size would that be, 800?..1200?

13BAce

When I did my rear housing Pep Boys was closed for Easter, and all I had was sandpaper. So I just sanded in circles. It seems to have worked ok. I forget what grit it was, but just use something pretty high and you should be ok.

Rotarydragon

It's always a good thing to try, but if you're not too confident a good rebuild is a good option. Mazdatrix rebuilds are a little more than most, but their rebuilds seem to be very good since they use ALOT of new parts and resurface the housings, etc.[/quote]

I figure I can do it, it's just a lot of cash to toss at something. I've rebuilt VW engines and a Cummins NTC800 diesel before so I've done that sort of work.



Something I REALLY want to try but it's just one of those things ya know?



Incidentally, rebuilding one of those big Cummins diesels is one of the easiest things in the world, save for removing the crank. That's one BIG freaking crank.

13BAce

It's always a good thing to try, but if you're not too confident a good rebuild is a good option. Mazdatrix rebuilds are a little more than most, but their rebuilds seem to be very good since they use ALOT of new parts and resurface the housings, etc.[/quote]

I figure I can do it, it's just a lot of cash to toss at something. I've rebuilt VW engines and a Cummins NTC800 diesel before so I've done that sort of work.



Something I REALLY want to try but it's just one of those things ya know?



Incidentally, rebuilding one of those big Cummins diesels is one of the easiest things in the world, save for removing the crank. That's one BIG freaking crank.[/quote]

The rotary is pretty easy to do. The key is to make sure that you prepare everything properly.