Engine - Transmission - Clutch ?
Thread Starter
Lotus Centaur/12A Rotary
Joined: Apr 2012
Posts: 8
Likes: 0
From: Niagara on the Lake Ontario
Engine - Transmission - Clutch ?
I have a 12A engine (in a kit car), it has the raised H's on the block(s).... I bought a 5 speed transmission from a 12A
I have to order a new clutch, pressure plate and bearing... Would this be a generic purchase...read somewhere about two different clutch sizes?
Would rather order the parts before pulling the engine/transmission, but not if there is a chance of having the wrong parts
(hows that for a newbie question?)
I have to order a new clutch, pressure plate and bearing... Would this be a generic purchase...read somewhere about two different clutch sizes?
Would rather order the parts before pulling the engine/transmission, but not if there is a chance of having the wrong parts
(hows that for a newbie question?)
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
You need to match the flywheel and clutch stuff to the transmission.
http://www.mazdatrix.com/g1.htm
All RX-7 12A 5 speeds use the same clutch/flywheel.
http://www.mazdatrix.com/g1.htm
All RX-7 12A 5 speeds use the same clutch/flywheel.
Thread Starter
Lotus Centaur/12A Rotary
Joined: Apr 2012
Posts: 8
Likes: 0
From: Niagara on the Lake Ontario
....anyone recognize the photo as an 84/85 ... am assuming that is the little vent mentioned in the link? but wasn't sure about the ribbed/smooth casing part?
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
That is a 2nd gen S4 transmission, 86-88. Most likely an '87. Bolts up fine to the 12A but you'll need to get the flywheel, clutch, slave, starter from the S4. And the mounts are different, as is tailshaft and transmission length.
Thread Starter
Lotus Centaur/12A Rotary
Joined: Apr 2012
Posts: 8
Likes: 0
From: Niagara on the Lake Ontario
...so that is the 8 3/4" clutch and the flywheel has to be changed to match? And that would be 2" longer then the first generation one that is in there?
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
You're stretching my memory at this point. 
The flywheel diameter between 12A and 13B NA is the same, and I'm fairly sure the clutch disc is the same diameter. However I don't think the flwheel is the same depth. Certainly the starter is in a different position which would indicate the flywheel changed.
Yes, it's something like 2" longer.
The flywheel diameter between 12A and 13B NA is the same, and I'm fairly sure the clutch disc is the same diameter. However I don't think the flwheel is the same depth. Certainly the starter is in a different position which would indicate the flywheel changed.Yes, it's something like 2" longer.
Thread
Thread Starter
Forum
Replies
Last Post