Even with all new parts, I still spend in the neighbourhood of 16 hours, measuring, clearancing, and then assembling.. Building a motor is not a race, the parts are to expensive to chance on bad clearances. The rotary is a very forgiving engine when it comes to tolerances, it will run with everything whacked out beyond mazda spec, but, it wont last long, make the power it should, or pass an emissions sniffer if it isnt up to snuff..

Even the best builders in Japan take 2 days +, and for those guys its all they do every day , month after month, year after year.

Or maybe you should try measuring all the parts. I dont take anything forgranted, not even with new parts. I measure everything twice, and make sure its exactly to spec.

when i built my bridge it took me 5 days and only like 3 hours to assemble once everything was checked. rev to 10,000 and all is good. damn clutches don't seem to be lasting though

I figure that if nothing looks heinous when I pull it apart, then it survived the last hundred thousand or so miles just fine and there's no point in measuring.



I do measure the seals, but the bearings, or rotor housings? Nah. Clean it up, smack the rotor gear down with a mallet for insurance, load up the seals and throw it together. Never had one problem.



The gotcha is when you get new parts. New parts are untested parts. New parts are unverified dimensions parts. They need a thorough inspection, cleaning, and measurement before use.

Thats exsactly how long it should take to assemble one. 2 to 3 hours.





Nahh you dont buy a brand new oil pump and take it apart and inspect it. You dont buy a brand new car and ohm the tps if its good do you?



Irons should take you no more then 12minutes a side MAX. Grab your runing clearance off the new housings your cleand rotors 5 minutes. Check the new barings after pressed in for any faults on pressing and iner intergity takes 10minutes. Check rotor grooves and face 15-20 minues. End play 10-15minutes.



If it takes any exsperianced person longer then that then. A: they never done a rotary or B: Find a new job. https://www.nopistons.com/forums/pub...R#>/violin.gif

Yes I do. You'd be amazed at how much dirt and debris comes pre-installed in new components. The tolerances may be off, as well. Cheap parts tend to not have very exacting tolerances, expensive parts tend to be handbuilt and more prone to human error. The bottom line is, if it is an unproven component, it is an unknown quantity unless you inspect and verify yourself.





No, but that is what the warranty period is for. Anything not built to spec will either fail within the warranty period, or that spec didn't really matter, since it did manage to last at least that long.



I haven't seen individual components (such as an oil pump) come with a warranty that covers collateral damage. They cover the oil pump only, and condolences for the $15,000 engine that you have to eat.

You need to purchas bettor parts then. Out of hundreds of motors I have yet to recive a bad or out of spec factory part or wiseco part. The key you need to know is the OE part is inspected befor they build it for sale. Things dont magicaly fall out of spec sorry.

So you'd think. Ask some of the dealer-types about the wonderful quality of MANA rebuilds. That is a replacement part at the OE level, so it should be good, right?



OEMs make very few components, it is mostly farmed out to outside suppliers. Many times, the parts sold over the counter are items that didn't pass spec for some reason, but are still deemed good enough for sale. After all, the design spec is to last at least until the end of the warranty. If something fails 2/3rds of the way through the warranty period, then a part only half as good should last the rest of the way.



These are the parts that you are buying. Would you trust them without knowing their story?

I can do anything any of you guys can do in 5 to 10 times the amount of time you can. so there.

heretic is right, but it's up to the integrity of the builder if he wishes to check it or if it's not worth the effort.