Well, after having the 7 in my shop for a week and watching the puddle of oil grow into a lake it looks like an engine rebuild is in the very near future. I never could get it to crank anymore anyway. So my question is this, can i use a true straight-edge and an O.D. mic to get a good indication of the wear of the rotors and housings based on the mazda manual without sending the parts to a machine shop? Finding a machine shop isnt afraid of a rotory engine in my area is like finding an rx that isnt a money pit. From reading the manual it seems pretty straight forward as far as the wear limits goes so im thinking that i can do it myself. Anyone have any advice?

Hmm seems like a waste of time and money to me to be measuring that stuff up. Always use new Rotor housings when rebuilding!!! If absolutley impossible to buy new ones and you have to use the old ones there are many things to look at before putting them in. If the inside portion where the apex seal moves around is not scarred then for the most part it will be ok.



all the parts necessary to do a good rebuild can be obtained for about 1300 dollars to my best recollection New parts are always better than machined ones IMO.

But new housings are around $1000, both at mazdatrix and adkins. While i do agree that its better to buy new when doing a rebuild, but wouldnt $1800 be somewhat excessive in a diy rebuild? ($1000 in housings and $800 in rebuild kit)? If this was a classic or exotic car i wouldnt blink an eye, but this is an 86 n/a beater that isnt beating.

you could also get a reman for $2k or pineappleracing.... a few guys just rebuilt their own engines, isamu, rotaryguy88(i think i forget LOL)

Pineapple ROCKS!

as you may have notice banzai is a pineapple ***** https://www.nopistons.com/forums/pub...DIR#>/wink.png

I like rotorsports racing in N.C. www.rotorsportsracing.com

to some up, yes you can measure all the old parts and see what you need.

there is no machining that really is needed, if the side housings are bad enough that they need to be lapped you would be better off with new.

new rotor housings are a big plus, but we have the mazdausa middle man so they are expensive.



mike

new housings all the way, if you buy all new housings, rotor kits, and gasket set, it gets quite expensive. I bought new rotors and hardened stationary gears also, the bill gets somewhat unreasonable at that point https://www.nopistons.com/forums/pub...DIR#>/wink.png

dont get me wrong, i really do like the car. but is it worth spending 2-3k on a engine for it? the whole car running prob isnt worth more than 2.5k