Is there a recommended full rebuild kit?
Show Is Nifty Thread Starter
Join Date: Jun 2008 Location: Apple Valley, MN Posts: 183 Received 1 Like on 1 Post Is there a recommended full rebuild kit? I'm pretty set on attempting a rebuild. I know that I can't be sure of what I need until I open it up but I'planning on replacing all seals and gaskets and go from there. If that is not necessary, please let me know. I really only see people talking about different apex seals occasionally so I'm assuming the rest is mostly standard. I'm not looking to build a race engine, I may try to turbo someday but mostly I just want to renew the life of my car. It has 90k on it and I'm starting to see symptoms of low compression. Thanks in advance.
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Join Date: Jan 2012 Location: Queens, NY Posts: 1,051 Likes: 0 First things first, you must open the engine to see what hard parts you will need. The Atkins master kit comes with most of the seals you'll need as well as extras you likely will not need. Such as gaskets for the long block.. Intake and exhaust manifold gaskets, oil pump chain, etc which can be reused. Inspect and make sure long block gaskets to be sure they're reusable. The Atkins basic engine closing kit comes with what you need to get the shortblock together, basically all your vital soft seals. Minus the oil control rings and supporting seals/springs. No matter what rebuild kit you go with you will want to order oil control rings, oil control O rings and Springs. as well as oil scraper rings and scraper ring springs (specific to the renesis) as 99% of rebuild kits I've seen do not include them. Some say they are re-usable. But why re-use any soft seals when rebuilding an engine? At the very minimum you're gonna need the basic engine closing kit from atkins or put together your own with all the internal seals. Then get the oil control seals/springs seperately. If you need the external/long block gasket kit get it as well. Hard parts (rotor housing, rotors, irons) you will need to spec to see what you need to replace or reuse.
Is Nifty Thread Starter
Join Date: Jun 2008 Location: Apple Valley, MN Posts: 183 Received 1 Like on 1 Post Thanks GK1707, I really appreciate your response. I wish I would have found this chart earlier: Rotary Engine Rebuild Kit Contents Chart It looks like with the closing kit, oil control rings, oil scraper rings, and scraper ring springs, it's about $1200. That's a couple hundred less than what I was expecting. Now I just need to open it up and see if I need to spend twice that much or not.
Out of NYC iTrader: (1)
Join Date: Jun 2005 Location: Planet Earth Posts: 19,875 to get a quality (somewhat) rebuild you need 2 rotor housing the minimum rotor housing for renesis with 40-50 k miles are mostly junk.
SARX Legend iTrader: (46)
Join Date: Jan 2007 Location: San Antonio, Texas Posts: 33,769 I wouldn't buy **** from Atkins and if you do make sure it's not the Cryo treated Apex seals (which they don't stand behind btw). Look at Racing Beat, Rotary Aviation, Pineapple Racing, Mazdatrix, etc.
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Join Date: May 2014 Location: CT Posts: 434 Quote: Originally Posted by 9krpmrx8
I wouldn't buy **** from Atkins and if you do make sure it's not the Cryo treated Apex seals (which they don't stand behind btw). Look at Racing Beat, Rotary Aviation, Pineapple Racing, Mazdatrix, etc. Would you elaborate as to why?
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Join Date: Jan 2012 Location: Queens, NY Posts: 1,051 Likes: 0 Wondering why too? Alot of the guys on 7club are using them without a hitch. I wouldn't mind using the rest of their kit but yeah personally I'd use different apex seals mainly for lack of info. I tried inquiring about the "black satin" apex seal they released for the Renesis. Supposedly "harder than Mazda seals and impregnated with dry lube" whatever that is.. And I got a email back that said its fine for reliability and none of their seals would wear the housing... pretty general response.
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Join Date: Jan 2007 Location: San Antonio, Texas Posts: 33,769 You can search here, others (Dannobre is one off the top of my head) here and on 7club have had similar issues. But basically my buddy bought cryo treated apex seals and a rebuild kit from Atkins. He used new housings, new eshaft, all news seals, etc. He has a background in engineering and machining and so he had the skillset and tools to spec every part out except one, the brand new cryo treated apex seals from Atkins. He built the engine and when it was finished it would not hold idle. We racked our brains but everything was installed right and working properly. So we pulled the engine right away and tore it down. The brand new Apex seals were scalloped in the middle. He sent pics to Dan at Atkins and was met with nothing but BS excuses about how they were not that way when shipped, he check every one himself, blah, blah, blah. Keep in mind this engine literally had zero miles on it. Long story short, my buddy didn't care to dick around with Atkins any longer so he replaced the apex seals with new OEM apex seals and reassembled the engine and it has been running great for four years. But of course the OEM parts they sell will be fine, I just personally would not order from them after seeing how they dealt with my buddy who had ordered a few thousand dollars worth of parts from that at that point. But if you do order treated seals or anything else they make then make sure you spec each part even if it is new. Last edited by 9krpmrx8; 10-06-2015 at 10:52 AM.
Is Nifty Thread Starter
Join Date: Jun 2008 Location: Apple Valley, MN Posts: 183 Received 1 Like on 1 Post Thanks for adding the picture, I wasn't sure what you meant exactly. I'm getting the impression that OEM is the safest route for reliability. Is there a confirmed aftermarket apex seal that is known to be better?
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Join Date: Jan 2007 Location: San Antonio, Texas Posts: 33,769 Not in my opinion. Most of the legit (who I consider legit anyway) builders I know of only recommend OEM seals on the Renesis. I am four years boosted on a Pineapple Racing built engine using only OEM seals. The build is more about the experience of the builder though IMO. Which is why I will help others if they choose to rebuild their own engines but for me personally I won't rebuild my own Renesis. There is just too much room for error and these engines are delicate enough when boosted so for me it doesn't make sense even though I have rebuilt engines is almost every other car I have owned. But that is a personal choice, there is definitely a ton of satisfaction in doing it yourself successfully and I can appreciate that.
Out of NYC iTrader: (1)
Join Date: Jun 2005 Location: Planet Earth Posts: 19,875 for apex seal, I use either OEM, or Ceramic, period.
WENTGERMAN iTrader: (6)
Join Date: Apr 2008 Location: Burbs,PA Posts: 5,805 Atkins is fine so long as you order OEM stuff. My advice would be to just have a reputable builder get you squared away.
Is Nifty Thread Starter
Join Date: Jun 2008 Location: Apple Valley, MN Posts: 183 Received 1 Like on 1 Post Quote: Originally Posted by shadycrew31 Atkins is fine so long as you order OEM stuff. My advice would be to just have a reputable builder get you squared away. Where's the fun in that?
WENTGERMAN iTrader: (6)
Join Date: Apr 2008 Location: Burbs,PA Posts: 5,805 Quote: Originally Posted by Shnifty Where's the fun in that? After going down this road several times I can tell you it is not fun.
Is Nifty Thread Starter
Join Date: Jun 2008 Location: Apple Valley, MN Posts: 183 Received 1 Like on 1 Post Quote: Originally Posted by shadycrew31 After going down this road several times I can tell you it is not fun. I'm sorry to hear that. I feel like I should go down that road at least once for good measure.
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Registered iTrader: (10)
Join Date: Jan 2012 Location: Queens, NY Posts: 1,051 Likes: 0 Quote: Originally Posted by Shnifty I'm sorry to hear that. I feel like I should go down that road at least once for good measure. My style of thinking as well.
WENTGERMAN iTrader: (6)
Join Date: Apr 2008 Location: Burbs,PA Posts: 5,805 As long as you have the money to support it go for it. There are several specialty tools you need to buy to spec the parts out, building the engine requires an additional set of tools. your basic rebuild kit can be in the 1500 range or more, you need to include new housings ($1500) usually as well. At the end of the day you could spend close to $4,000. So at that point you are better off getting it professionally rebuilt.
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Join Date: Jan 2003 Location: Portland,OR Posts: 10,462 At least in the beginning, the Atkins kit shipped RX7 seals with the RX8 rebuild kit. If anyone were to buy with them should see if they updated the kit.
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Join Date: Apr 2008 Location: Burbs,PA Posts: 5,805 Quote: Originally Posted by pdxhak
At least in the beginning, the Atkins kit shipped RX7 seals with the RX8 rebuild kit. If anyone were to buy with them should see if they updated the kit. You can get them with RX8 OEM apex seals.
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Join Date: Oct 2015 Location: Savannah, GA Posts: 34 Likes: 0 Received 0 Likes on 0 Posts After Having a 'reputable' engine builder rebuild my TurboII Motor, only to have a folded water seal and crushed needle bearings right off the bat, my only option at the time was to rebuild it myself..I did so, and the car ran great...I did have the plates lapped to make sure the oil rings sealed as well as the corner and side seals didn't skip...It was a great experience and source of pride. Follow the videos that are out and take your time. Unfortunately time is something I don't have much of anymore, so a MazMart Improved Remanufactured motor or a Pineapple Racing rebuild will be a next step for me. However, my Reman only has 25k miles on it now... Rick Engman once told me to only buy Mazda parts for cars that are run on the street...Since he builds 4 Rotors that have won the 24 hours of Daytona, I trust his judgment... Last edited by Quicker10u; 12-17-2015 at 03:35 PM. Reason: Blah.
SARX Legend iTrader: (46)
Join Date: Jan 2007 Location: San Antonio, Texas Posts: 33,769 Care to share who this builder was? It might save someone else a head ache.
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Join Date: Oct 2015 Location: Savannah, GA Posts: 34 Likes: 0 Received 0 Likes on 0 Posts Quote: Originally Posted by
9krpmrx8 Care to share who this builder was? It might save someone else a head ache. Keep in mind that this was 2001-2002 ish. His name was Guch Lazardi and his shop was Guch's Motorsports in Columbus, GA. I was living in Atlanta at the time and Rick was covered up with Jim Downings ALMS effort and not able to help me (he did after Guch's rebuild blew up by checking my rotors and housings, lapping my irons, etc.) I actually filed a suit against him in small claims court and instead of facing me, he closed up shop and moved (FL last I heard). True scumbag, but everyone in Atlanta recommended him at the time.
SARX Legend iTrader: (46)
Join Date: Jan 2007 Location: San Antonio, Texas Posts: 33,769 A sad but familiar story in rotary land. That sucks man, my buddy ended up with a $10,000 paperweight after BDC (Brian D. Cain) built him an engine that idled for all of about 5 minutes.
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Join Date: Oct 2015 Location: Savannah, GA Posts: 34 Likes: 0 Received 0 Likes on 0 Posts Quote: Originally Posted by
9krpmrx8 A sad but familiar story in rotary land. That sucks man, my buddy ended up with a $10,000 paperweight after BDC (Brian D. Cain) built him an engine that idled for all of about 5 minutes. Yikes...I wasn't into it for that much $$ luckily...It was a lesson learned the hard way, but I would have never had the opportunity to learn how to rebuild it myself and use mass quantities of Vaseline in the process. LOL. I look back on it now as positive thing, and as you can see by what I drive, it still has not turned me away from the pistonless engine...
Thread Thread Starter Forum Last Post Threshermal New Member Forum 3 04-15-2020 09:43 PM Touge Canada Forum 3 09-10-2015 08:07 AM mattymack New Member Forum 2 09-06-2015 10:33 PM chris424 New Member Forum 0 09-02-2015 10:18 AM wayloco RX-8's For Sale/Wanted 0 09-01-2015 09:03 PM How much does it cost to fix a RXA proper rebuild, one that goes beyond running (120+ PSI warm compression numbers) will be north of $4000. With upgrades for power and longevity, you can expect to pay $6k. A Mazda remanufactured engine comes with new housings, irons, rotors, seals, etc for as low as $2900.
How long does a rebuilt RXJust like any other engine, taking the time to care for it properly will make it last longer than usual, however, that could mean 80,000 miles or less.
How hard is it to rebuild a rotary motor?The rebuild of a rotary is actually quite easy, far easier than rebuilding a conventional piston engine, basically you build from the bottom up, by placing parts on top of eachother. Now there is lots more than what I just said, but thats the basics. if you are slightly mechanically inclined you should have no problem.
How much HP can a RXThe Mazda RX-8 is powered by a 1.3L RENESIS two-rotor rotary engine that makes 212 horsepower at 7,500 rpm and 159 pound-feet of torque at 5,500 rpm. When equipped with a manual transmission, however, the RX-8 rotary engine churns out 232 horsepower at 8,500 rpm.
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2007 mazda rx8 engine rebuild kit
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