Hurry up with that compression test already; I want numbers. Also, my compression tester.

So if that is true then that explains the hike by Mazda on the price of remans.

Doesn't seem that expensive...
https://www.promazdaparts.com/oem-pa...-n3h302200rv0/

If what Paul has shown us is broadly representative of the average reman, I don't know why any average owner would pay only slightly less for a budget rebuild. Obviously, owners with special needs (racing, turbo, ego, etc) might be better served with a custom build.

It definitely makes it worth starting with a Mazda reman as a base for a rebuild.

My guess would be that it more about bearing wear and the cost to replace bearings vs just getting an entire rotor .

Do new rotors come with a bearing? Seems like they would have to install new bearings anyway and according to sleepy-z, new bearings and eshafts were always used in remans.

I thought they did ..... but not 100% sure .

So the only used part is the front cover and sump?

Motorsport members get it for 20% less, but an S2 manual trans keg is about 50% more while the S2 auto trans keg is the same price as the S1 :scratchhe

This confuses me, are you saying you would rebuild a reman?

That is a decent price if they are using new parts.
But if they are using new housings why are they charging a $1000 core charge?

Maybe not so much rebuild as start with it as a foundation for further modifications.

I priced out all of the components for a rebuild on Mazda Motorsports and, IIRC, the parts alone came to ~$3500. The most important (and expensive) parts seem to be included in the Mazda reman. Since you can get a reman for less than $3k now, it seems like a no-brainer.

No idea. Institutional momentum?

Mr. Pockets bought his reman from that seller and it's a genuine Mazda unit. Installed earlier this year and used for NASA TT racing. Compression tested it last night with my RCT-V5.
Front: 114/110/112 @260 RPM
Rear: 112/112/108 @262 RPM

That's a far cry better than the rebuild I got from OJ Imports who reused my housings and, after you factor in my attempt to get him to back his product, it was roughly the same price (yup, kicking myself now).

So, that's two recent Mazda remans that appear to be pretty skookum.

-Jason

Somebody's been watching too much AvE. . . I approve! :beerchug:

Meanwhile, as a result of this thread and with a Mazdacomp discount, I'm thinking I should buy one and stuff it away for when my engine finally kicks the bucket. Looks like they are building them right now.

Yeah, I would. I mean you can get a reman for $2800 IIRC, new rotors and housings alone will run about $3400.00. Plus with a Mazda reman you get new bearings, new eshaft, etc.

When I was looking at my options a few months ago after finding my engine had low compression, a Mazda reman seemed like the obvious choice. I did not understand the dogma against remans, since the one I had installed in 2009 had served me so well.

Only on this site did I read that the remans re-used marginal parts. Elsewhere, from Mazda and from the sites that sell the engines, I read they had new rotors and housings. So I am not the least bit surprised by the 'revelations' in this thread.

As Jason says above, I bought mine from Jeff Haas Mazda in Houston. Their prices (on the engine and the shipping) were the lowest by a long shot. My local dealer couldn't come close even without having to ship.

Shipping my old engine back, however, was an adventure...

I'n thinking about ordering one and eating the core so I can take apart my engine.
I need to be sure they're using new components.
I'm leery of the core charge, plus shipping, (?) it doesn't seem kosher.

In my experience the dealer sends back the core. You could just tear it down, take pics and then slap it back together dirty and send it back as a core.

Yeah, I don't think you need to worry about that. The new engine purchase and your core have really nothing to do with each other. They're at opposite ends of the chain.

If it makes you feel better, just send your core back after you get the new engine. I had mine in many pieces because I thought I was going to rebuild it. When the new one came I just put it back together with all the bolts finger-tight.

I was vague about the shipping being an adventure. UPS is simply not set up for an individual to send a freight shipment, so it can be a bit of a headache. But shipping my engine back was still under $200.

Okay, I freely plead ignorance on all of the internal workings of a Renesis.
I also have for many years been under the impression that core charges were used to obtain parts that could be refurbished and resold.

That being said, it's a 'remanufactured' engine, not 'new', correct?
So, what is not new in the engine that would warrant a $1000 core charge, 2 used rotors and a used shaft?

irons and front cover

And a bunch of little stuff. Plus a reman is shipped with a flywheel.

In addition to rotors and a shaft?
Do you or anyone else know if these are possibly reconditioned?

I'm asking to satisfy my own curiosity.
I know shafts can affordably be spray welded and remachined, are the irons and cover also refurbished somehow, or just ones in good condition are being reused?

Thanks, I'm trying to find a source that specifies what's new and what's used, no luck yet.

I don't think you will find that anywhere. Sleepy-z was asked to stop sharing that info with us pretty early on after the reman plant opened and it appears things have changed now.

they re use gaskets, apex, side, corner seals, springs, oil rings and used oil lol. you would probably need to get a job there rebuilding motors to know for sure and you wouldnt be allowed to tell us