Taking apart fresh Mazda REMAN at Mazmart
#101
40th anniversary Edition
My Mazda reman was installed last summer 2016. It seems stronger than the original engine when I bought the car new in 2008. No numbers to be specific, but been driving rotaries a long time and it is definitely stronger. Probably got one of the better built remans. I have had the same two mechanics exclusively that have worked on my 2008 RX8 since new, and they concur that this reman engine feels stronger.
Thanks Paul for your posts !
Thanks Paul for your posts !
#103
The flat housing we found in this engine was near enough to new, not showing much discernible wear. When you have enough wear, the oil, corner and side seals cannot do their job properly and it is a source of compression loss as well as blow by.
Paul.
#104
You gonna eat that?
iTrader: (1)
The Center Flat Housing is a major integral part of the 'block'. The center flat housing divides one rotor housing from another and provides a surface for the moving rotor to ride along with it's oil, corner and side seals separating functions. It contains cooling passages that meet other cooling passages in mating components (Rotor housings). Dowels pass through it creating strength and rigidity against twisting and Siamese exhaust ports are located in the center flat housing.
The flat housing we found in this engine was near enough to new, not showing much discernible wear. When you have enough wear, the oil, corner and side seals cannot do their job properly and it is a source of compression loss as well as blow by.
Paul.
The flat housing we found in this engine was near enough to new, not showing much discernible wear. When you have enough wear, the oil, corner and side seals cannot do their job properly and it is a source of compression loss as well as blow by.
Paul.
![Smilie](https://www.rx8club.com/images/smilies/smile.gif)
#106
My Mazda reman was installed last summer 2016. It seems stronger than the original engine when I bought the car new in 2008. No numbers to be specific, but been driving rotaries a long time and it is definitely stronger. Probably got one of the better built remans. I have had the same two mechanics exclusively that have worked on my 2008 RX8 since new, and they concur that this reman engine feels stronger.
Thanks Paul for your posts!
Thanks Paul for your posts!
#107
Synopsis
So, the verdict on this one:
With a Mazda reman you get practically a BRAND NEW ENGINE: New rotor housings, new rotors, new eccentric shaft, new main bearings, new counter weights, all new seals, new tension bolts, new water pump, new oil pan and often all new side housings. Front cover is usually used.
My criticism: They start these engines with water in them and do not drain the water properly. This results in a fair amount of rust in coolant passages and water pump,
I've encountered about 2 or 3 errors out of several dozen engines that I will not detail today.
We use them for installs at our shop and will also go through them for clients with the right budget, perhaps wanting some upgrades. They offer BY FAR the best bang for the buck, as Mazda seems to be subsidizing.
Paul.
With a Mazda reman you get practically a BRAND NEW ENGINE: New rotor housings, new rotors, new eccentric shaft, new main bearings, new counter weights, all new seals, new tension bolts, new water pump, new oil pan and often all new side housings. Front cover is usually used.
My criticism: They start these engines with water in them and do not drain the water properly. This results in a fair amount of rust in coolant passages and water pump,
I've encountered about 2 or 3 errors out of several dozen engines that I will not detail today.
We use them for installs at our shop and will also go through them for clients with the right budget, perhaps wanting some upgrades. They offer BY FAR the best bang for the buck, as Mazda seems to be subsidizing.
Paul.
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#108
What am I doing here?
Join Date: Mar 2006
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I wonder if somebody at Mazda felt bad about how completely they screwed the pooch on the Renesis (and doubled-down with the first generation of rebuilds). Maybe this is their unspoken way of trying to make it up to us.
Last edited by NotAPreppie; 08-29-2017 at 02:28 PM.
#109
You gonna eat that?
iTrader: (1)
Thanks for this thread, it was very informative.
About the rust, if one of us should buy one of these, are there precautionary steps we could take to minimize it?
About the rust, if one of us should buy one of these, are there precautionary steps we could take to minimize it?
Last edited by BigCajun; 09-02-2017 at 05:22 PM.
#112
SARX Legend
iTrader: (46)
![TX](https://www.rx8club.com/images/icons/tx.jpg)
Well I would hardly call this conclusive, people have still gotten remans in the last couple of years that didn't last long. But if your plan is to buy one and then have it rebuilt, then that might be smart if they are all getting the new parts.
Last edited by 9krpmrx8; 08-29-2017 at 05:27 PM.
#113
What am I doing here?
Join Date: Mar 2006
Location: 2017 Miata RF Launch Edition
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I understand what you're saying, 9k, but I think if I had the choice of spending $3k on a reman v.s. a $3k rebuild, I don't think it's unreasonable to go with the reman.
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gwilliams6 (08-30-2017)
#115
Registered
iTrader: (1)
So, the verdict on this one:
My criticism: They start these engines with water in them and do not drain the water properly. This results in a fair amount of rust in coolant passages and water pump,
I've encountered about 2 or 3 errors out of several dozen engines that I will not detail today.
My criticism: They start these engines with water in them and do not drain the water properly. This results in a fair amount of rust in coolant passages and water pump,
I've encountered about 2 or 3 errors out of several dozen engines that I will not detail today.
I understand what you're saying, 9k, but I think if I had the choice of spending $3k on a reman v.s. a $3k rebuild, I don't think it's unreasonable to go with the reman.
#116
You gonna eat that?
iTrader: (1)
Maybe they're thinking about negating the potential impact of a future class action lawsuit?
Showing a good faith effort to try and remedy a serious issue?
You know lawyers.
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#118
40th anniversary Edition
Again thanks Paul. Now I have a good idea why this reman runs so strong.
I did a coolant flush on my Mazda reman when I upgraded and replaced my cooling system after about 4k miles on the reman, so that evidently was a good thing.
I did a coolant flush on my Mazda reman when I upgraded and replaced my cooling system after about 4k miles on the reman, so that evidently was a good thing.
Last edited by gwilliams6; 08-30-2017 at 08:17 AM.
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#121
Registered
You can't be that naive. They're doing this for now because it makes the most business sense. I love Mazda, but they're a company. They do things out of pragmatism, not obligation.
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#123
You gonna eat that?
iTrader: (1)
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Okki-Jakarta (09-07-2017)
#124
FULLY SEMI AUTOMATIC
iTrader: (9)
team many members here have claimed that title over the years, just look at some swap threads. or ya can just look at 99% of posts by newbz. $2500 car nowadays doesnt attract smart adults
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wankelbolt (09-01-2017)