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Mazda remans

Old 02-21-2013, 08:00 PM
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Mazda remans

I spoke with mazmart today and I'm being told that they use Mazda remans that contain new rotors, housings, obviously new seals, but with a few upgraded parts "for longevity" and I'm wondering if its truly that big of a difference. If I get the motor installed at the stealership mazmart says they increase the warranty to 18 months. As far as I can tell, all remans are using new rotors and housings, correct?
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Old 02-21-2013, 08:11 PM
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Incorrect. All mazfa remans definitely do NOT use new rotors and housings. I'm not familiar in any way with what a Mazmart reman build includes, but I can tell you Mazda remans don't just include new rotors and housings by default. If at all.
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Old 02-21-2013, 08:19 PM
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Hmm. What I was told was that the motor is a Mazda remanufactured engine that includes new housings/rotors. perhaps mazmart snags the ones exclusively with new irons?
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Old 02-21-2013, 09:50 PM
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Originally Posted by RadRedR3 View Post
Incorrect. All mazfa remans definitely do NOT use new rotors and housings. I'm not familiar in any way with what a Mazmart reman build includes, but I can tell you Mazda remans don't just include new rotors and housings by default. If at all.
wrong, 90% of the time they use BRAND NEW housing and Irons.

Why they are crappy because ---- these engines are hand build and OFTEN the factory workers just randomly throw **** together, put tons of silicone like it's free and jamming **** up. for example the water seals, sometimes they just install it with the teflon side facing the iron/housing, not facing outwards/inwards like it's supposed to, it will work but u gonna get a horrible leak sooner rather than later.

Mazmart will rebuild them "properly" everytime, and u can also add their water pump/oil pressure mod to the engine which WILL increase the engine longevity in the long run.


when I need to get a Mazda Reman one day, I will get it and tear it down, clean everything and rebuild it myself, I can probably reuse everything from the build, just making sure there were no "Factory fuxk ups"

Last edited by nycgps; 02-21-2013 at 09:53 PM.
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Old 02-21-2013, 10:12 PM
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Oh well. If you say so. That's just what i had understood. Doesn't matter to me either way.
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Old 02-21-2013, 11:16 PM
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Originally Posted by RadRedR3 View Post
Oh well. If you say so. That's just what i had understood. Doesn't matter to me either way.
when you think about it, it makes more logical(financially) sense to use new housing than old, cuz in a factory, u want everything to be "fast", even the old ones might be ok. it cost more for mazda(the rebuild factory actually) to check each used rotor housing/Iron that comes into the factory than just throw them away and use brand new ones.

Last edited by nycgps; 02-21-2013 at 11:25 PM.
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Old 02-21-2013, 11:37 PM
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You're right. It does make sense. I'd just talked to some people and read some things here that seemed to indicate they reused those parts. Then again that may have been the first remans? Anyway, if and when my (son's) R3 ever needs a new core I have to pay for, sounds like Mazmart is the way I'd go.

I've built a 753 rwhp GT500 in my shop, along with a supercharged LT1, and a couple turbo'd LSX engines... But I wouldn't even attempt a rotary rebuild. Lol.

I got involved with the RX8 scene because my son turned 16 and I bought him the 09 R3 that's my avatar. He loves it. Details it every weekend and does all the routine maintenance. We've installed a killer stereo, and some bolt on's like an AEM cai. I can handle anything else on the car. But a rebuild or internal work on the rotary... Not my skill set.
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Old 02-22-2013, 12:30 PM
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all of the Rx8 remans i've seen have new rotor housings. can't tell with the rotors, as there's no easy way to tell, its not like the older engines where you can look in the exhaust ports.

in the bad old days, two reman facilities ago, Mazda remans used to be a real hit and miss thing, sometimes you'd get a brand new engine, sometimes you'd get a 100% used engine with spray paint over the grease.

lots of dated and incorrect info floating around.

you do also get all new seals and gaskets
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Old 02-22-2013, 12:31 PM
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Thanks. That's good info.
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Old 02-22-2013, 06:22 PM
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mazmart is worth every penny.
Let me tell you a story of a very good friend of mine. Long story short--he trashed his engine.
Mazmart ordered one for him and my friend wanted it done right - so -he had Mazmart rebuild, the rebuild. What they found on dis assembly was side seal clearances clearances WAY off, the front oil bypass regulator was LOOSE and the assembly needed better balancing for a 8.5K rpm redline. My friend now has a properly built engine.
Not only is it clearances concerning the seals, but clearances around the main bearings, stationary gears etc are critical---as well as proper oil supply for the use the motor is going to see. There are many little things in the rotary engine that need proper addressing that a lot of people are not aware off. Sometimes even the factory themselves--lol.
tell Paul at Mazmart olddragger sent you and he will give to $1 off--seriously.

Last edited by olddragger; 02-22-2013 at 06:24 PM.
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Old 02-22-2013, 09:24 PM
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tell me about it od

my fc had a mazda reman, at least thats what i was told, it was paid for and installed by the last last owner

it had roughly about 50k when i got it? upon dissaembly, the engine was re build so wrong inside out, housing looks like it has gone thru over 100 k miles, it was installed with a "k" ring which put its spec way off, side seals were way off even for a 50 k engine, silicone every freaking where, yea, it was pretty disgusting
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Old 02-22-2013, 11:07 PM
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I put in a reman about 10K miles ago, crossing my fingers it holds up. No issues so far, mileage is good, pulls great, and idles like a charm.

I wonder if the remans are built here or in Japan. If this one goes south I'll tear the next one down before I put it in.
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Old 02-23-2013, 12:36 AM
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Sorry NYCGPS, I gotta call negative on your theory of new housings and rotors. We have torn apart three low mileage remans and all had housings that were not reusable. As for the rotors, well that is hard to tell. Only one of these engines actually failed (one housing without compression) the other two (one mine) were only pulled because the failure modes were identified before they stopped running and they were pulled to conserve what parts were still good.

Mine in particular were way out of spec and had cracks, etc. in them. The engine was still running at 90% when it was pulled when I confirmed thru oil test that I had a coolant leak.

Edit: My memory serves me correct, I am not getting old afterall.

From Sleepy-Z (Mazda reman plant employee)

Originally Posted by Sleepy-z View Post
Rebuilt engine parts to be exact.....maybe 20% chance I built it btw....

New parts guaranteed...
Rotors and components on the rotor like springs/seals, water pump, oil pan, all rubber/metal seals/gaskets, bearings for stat. gears and rotors
.
50/50 shot of new parts.....
Some housing are new, pulley, flywheel can be used btw but 75% are new roughly, eccentric shaft is usually used but chance of a new one.

Used........
Some housings, pulleys, flywheels, stationary gears are used but with bearings pressed in by yours truely(apperantly I am the only one there that is capable of doing it without messing up), parts in the oil pan(sensor, baffle plate so on), oil pump/chain.


BTW small note, all oil pans are updated to the newer style(metal baffle plate added).



Now to answer the question of whether it will last longer, well a rebuild usually wont laster then a new motor unless the new motor had a odd issue, it has used parts involved not new. Brand new housing all the way through would obviously give it a longer life but thats the way it is. Chances are yours had carbon built up and lacked power, my advice is read up on everything this site offers to keep it running strong. Sythetic is not neccesary, your rebuilt motor was just ran with convetional oil so you can start over, we test them by running them 22 mins and injecting them with some mazda gasket sealant to help them seal better(or whatever it does). I cant tell you what you should or shouldn't do since I work for mazda besides follow the what the manual says to do, just read advice on here and make your own choices. I am no expert, I just build it(bottom of the ladder at mazda usa). BTW managed to beat my record of assembling the motor, built one in 22mins last week lol best of luck.

Last edited by 9krpmrx8; 02-23-2013 at 12:49 AM.
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Old 02-23-2013, 03:19 AM
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Originally Posted by 9krpmrx8 View Post
Sorry NYCGPS, I gotta call negative on your theory of new housings and rotors. We have torn apart three low mileage remans and all had housings that were not reusable. As for the rotors, well that is hard to tell. Only one of these engines actually failed (one housing without compression) the other two (one mine) were only pulled because the failure modes were identified before they stopped running and they were pulled to conserve what parts were still good.

Mine in particular were way out of spec and had cracks, etc. in them. The engine was still running at 90% when it was pulled when I confirmed thru oil test that I had a coolant leak.

Edit: My memory serves me correct, I am not getting old afterall.

From Sleepy-Z (Mazda reman plant employee)
well, think of it this way, in the earlier days when the engine warranty first startedm there were more old engines coming in, so the chance of getting a used part will be significantly higher.

but now, chances of getting used parts are slimmer than it was, which is the reason why there are more and more new parts in their "reman" engines. dont forget, last sleepyz post was couple years. ago

and i forsee in a year or 2, a reman is actually brand. new. engines, just look at fc/fd, all the same

Last edited by nycgps; 02-23-2013 at 03:24 AM.
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Old 02-23-2013, 04:12 AM
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Thanks for the info everyone. When I horribly failed the compression test back in a year and a half ago I was told by the rotary specialist that also worked at a local rotary rebuild shop that Mazda was running low usable cores and started using new. This kind of opens up a few more questions though. Does mazmart rebuild the remans they receive? In the conversation I had with them they other day, he didn't mention it.
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Old 02-23-2013, 04:15 AM
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Contact them directly and ask again, it's your best bet.
Of all the engine builders in the remanufacturing game Mazmart is one of the very few i trust with both a reman or a performance build.
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Old 02-23-2013, 09:36 AM
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I am no expert, I just build it(bottom of the ladder at mazda usa). BTW managed to beat my record of assembling the motor, built one in 22mins last week lol best of luck.
always left me feeling a bit queasy about Mazda remans. I'll probably get the customary compression test at 7 1/2 years, but will be hoping for good results rather than a free "new" engine.

Ken
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Old 02-23-2013, 10:31 AM
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Yes contact Mazmart and they can give the details of all their services and their recommendations.
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