Video: 13B Rotary Engine Rebuild
As part of my '76 Cosmo project, I just built a 6 port 13B NA engine and posted the entire process to YouTube. I then realized that the video applies to basically all 12A and 13B rotary engines, so I'm going to also post the video in the 1st, 2nd and 3rd gen forums for anyone who is building a rotary.
If you've never built an engine, or are just about to, then you want to watch this video. Covered is the entire build process of a 13B rotary including: measuring rotors, clearancing side seals, assembling all rotor seals, assembling the short block, setting eccentric shaft end play, assembling the "under the front cover" stuff and finally installing the front cover as well as torquing the front hub bolt. As far as I know, this is the only full process free rotary rebuild video out there. This video, combined with the Haynes/FSM manuals, should enable anyone to be confident in putting together their first engine. While the engine shown in this video is a hybrid engine made from both RX-5 Cosmo and GSL-SE parts, the steps covered are the same for any Mazda rotary from 12A to 13B-REW. http://www.youtube.com/watch?v=ijJeUk_GqiI Enjoy! Incidentally, this is my first ever post to the 3rd gen forum. Yay for me. :) |
Wow, thank you for putting in the time to share the process with us.
You're really doing the lords work :) |
Learned a lot just from watching this... there is a substantial amount of useful information that people can use if they decide to attempt a rebuild themselves. thanks for the time and effort put into this video!
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Yes, thanks for this. Watched the entire thing and all of was useful. Awesome work! And I am enjoying your video build thread too.
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love it!! great job and keep up the good work.
27:15 "Never have too much lube..." :icon_tup::icon_tup: |
Great post! and perfect timing for me, Just pulled my engine (for the first time) today!
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Great video. Mildy funny part when you are torquing the bolts near the 41 min mark. Cool, Bitchen, sweet, wicked, something awesome, orgasmic, woops!
lol |
best video iv seen! THANKs.
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Great video!!!!
Thanks Aaron |
Originally Posted by Double_J
(Post 10514732)
Great video. Mildy funny part when you are torquing the bolts near the 41 min mark. Cool, Bitchen, sweet, wicked, something awesome, orgasmic, woops!
lol |
AWESOME video!!! You make it look extremely easy. One question though. I got tough to put the Apex seals while the rotors where out and use a rubber band to keep them in place. Then install the housing first then the rotor. Once the rotor is half way in you can remove the rubber band. The reason I say this is because I was told that jamming the springs in have the potential to bending them. Is there anything wrong with this method?
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Thanks for the vid. I saved it to my pc for future reference :)
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Definitively AWESOME!!!!
Thanks Aaron. |
awesome, thank you for posting this.
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thanks for making the video. Very informative.
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great video, watched the whole thing :). your comments when it comes to use vaseline are funny.
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great video, thank you.
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huge help thank you sir
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7 Attachment(s)
Great video! Good on you sir ;-) Here is what we did to help with grinding down the side seals...
We decided to use a junk rotor to act as our jig for grinding down the side seals. This is pretty ideal considering it doesn't allow movement side to side (potentially breaking). Attachment 722980 We then milled down a side of the face to allow the seal to be grabbed and pushed along it's intended location as a guide/rail. Attachment 722981 Attachment 722982 Attachment 722983 One corner was left untouched for about 3/4 of an inch and then stepped to allow the seal to be pushed down fully with one hand and guided by the other. Once the rotor was milled then it was placed in the drill press and a circular grinding stone was installed, guided inside the corner seal bore and locked into position. Attachment 722984 Attachment 722985 You can see the seal sitting and the rear is exposed so it can be pushed along Attachment 722986 Everyone does things different, we just decided to give this a shot. And remember, no good rotors were harmed in the making of this jig :-) |
Originally Posted by hondasr4kids
(Post 10514899)
AWESOME video!!! You make it look extremely easy. One question though. I got tough to put the Apex seals while the rotors where out and use a rubber band to keep them in place. Then install the housing first then the rotor. Once the rotor is half way in you can remove the rubber band. The reason I say this is because I was told that jamming the springs in have the potential to bending them. Is there anything wrong with this method?
Originally Posted by unreal-icarus
(Post 10516386)
great video, watched the whole thing :). your comments when it comes to use vaseline are funny.
Originally Posted by t2terror
(Post 10517579)
Great video! Good on you sir ;-) Here is what we did to help with grinding down the side seals...
<snip> Everyone does things different, we just decided to give this a shot. And remember, no good rotors were harmed in the making of this jig :-) |
That makes sense, i'd be in the same boat too if I was in your shoes... It really didn't take much time to mill it down, of course my buddy is experienced on the mill and made it look easy.
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wow. really amazing.
I never really had a sense of what this took until now. Now that I see it, I know I can do it! w00t to you sir! |
The video is pretty awesome, thanks
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I agree, thanks for making that video. Excellent stuff.
You are truly an asset to the rotary community and we appreciate it. :icon_tup::nod: |
Another great video! I'm a first time engine builder, but not mechanically stupid. I work on multi-million dollar aircraft as my job. Anyways...one question as I have mine apart waiting to get my rebuild kit here. I was wondering if the side seals and/or the corner seals can be reused if they still meet the clearance check at the corner seals? The reason I'm rebuilding the engine is there was some oil smoke that wouldn't go away when the car was up to temp and the exhaust smelled really rich. I did a compression check, which was 80 psi on both the front and rear using the 3 bounce per rotor check. I've cleaned up the engine plates, housings, and rotors. I still need to do some housing and plate measurements. I don't have any gouges in them, but I'm still going to dial gauge them to make sure they are still within limits. Thanks for any replies!
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I first started following your build on youtube and came across this thread. You are doing an awesome job. Please keep up the good work. Lets get that thing finished.
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Originally Posted by 95R_Bathurst
(Post 10777111)
Another great video! I'm a first time engine builder, but not mechanically stupid. I work on multi-million dollar aircraft as my job. Anyways...one question as I have mine apart waiting to get my rebuild kit here. I was wondering if the side seals and/or the corner seals can be reused if they still meet the clearance check at the corner seals?
It may even be easier for a first time builder to use them again since they don't to go through the clearancing procedure. However, for the minimal investment, I generally replace them. The reason I'm rebuilding the engine is there was some oil smoke that wouldn't go away when the car was up to temp and the exhaust smelled really rich. |
Originally Posted by Aaron Cake
(Post 10784832)
As long as those seals are within all tolerances (they are found in the FSM), then they are fine to use again.
It may even be easier for a first time builder to use them again since they don't to go through the clearancing procedure. However, for the minimal investment, I generally replace them. Most likely oil o-rings. |
Great video! Thanks!
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Great video, I learned something today:nod:
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Freaking awesome.
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This is so useful. good job
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cant wait to use this info, found out i overheated my engine today, will be rebuilding asap!
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Originally Posted by ramo
(Post 10907282)
cant wait to use this info, found out i overheated my engine today, will be rebuilding asap!
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Aaron Cake You are the Man... i have all the rebuild videos but your is the most informative and detailed....
Very very helpful |
Thank you!
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Well instead of doing what I planned to do today, I was distracted by the engine build and then your build process. Thanks for taking the time to put these videos together. Looking forward to more of the build/instructions, safety reports, product placements, sexual innuendos, psychedelic graphics, weather reports, and what-not-to-do's.:popcorn:
Thanks:icon_tup::) |
Hahaha, awesome! It may be a little while before the next one as we're entering auto show season, plus I'm out of the country for a week in February. Couple that with the fact that I'm working on boring sheet metal and, well, it may be a while. :)
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Thanks im thinking about rebuilding in the next 2 weeks
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Thanks Aaron Cake!
This may be just the encouragement that I need to take on my first engine rebuild! |
such a good video!! i can honestly watch this over and over again , and very entertaining lol your next video should be on a auto to manual swap !!
thanks for making this rebuild look easily and pretty straight forward , learned alot! |
keep up the good work
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