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Need help identifying flywheel.

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Old 10-13-18, 11:42 PM
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Need help identifying flywheel.

I need help identifying the flywheel model year. I have an Exedy clutch kit for an 83-85 that doesnít fit. On the engine side, I only see ď79Ē stamped on but Iím not sure itís off a 79 rx7. Could it be an 81-82?

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Old 10-14-18, 07:23 AM
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That looks like a series 1 flywheel
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Old 10-14-18, 10:03 AM
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What year is your engine? Looks 83-85. What rotating assembly? There is a chance it's the wrong flywheel. That flywheel looks like an 81-82 but I don't have any 79-80 here to look at for comparison.
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Old 10-14-18, 11:02 AM
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You really almost have to remove it to figure out exactly which flywheel you have. Mazdatrix has a page that show the various markings for each year.

Flywheels
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Old 10-14-18, 01:26 PM
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Unless you back-dated that oil cooler, it's fairly safe to say that you have the wrong flywheel (based on the link TG Farrell posted above) from your photo. I see markings on the tension bolts, so recently built? By you? And like Jeff20B asked above, what rotating assembly?
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Old 10-14-18, 02:21 PM
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measure the surface area to determine if you have a 215mm or 225mm flywheel
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Old 10-14-18, 09:28 PM
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If it is an 81-82 like I suspect, he will see about 225mm, but that is due to the actual friction surface he is measuring. This means he can probably install a 225mm disc. However he can't fit a 225mm pressure plate due to its step height which differs from a 215mm pressure plate, which is what he should be using on this flywheel.
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Old 10-15-18, 06:30 AM
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Just FYI, 81 - 82 flywheels are compatible with 79 - 80. They fit together the same and are balanced to each others rotating assemblies. Difference is, the 81 -82's are about 7 lbs. lighter overall. Sounds like your engine needs a later flywheel to balance it out and fit up. The pic's are from an 81.
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Old 10-15-18, 09:16 PM
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The rotating assembly is from an '83 and the rest of the build is from an '85 (irons, housings). I had this motor rebuilt recently but since I didn't have the '85 flywheel with me at the time, the builder had this one available to put on. So now that I have the original flywheel, is it okay to remove this one and replace? Would that affect any of the endplay of the engine?
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Old 10-15-18, 09:23 PM
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Originally Posted by Jeff20B View Post
If it is an 81-82 like I suspect, he will see about 225mm, but that is due to the actual friction surface he is measuring. This means he can probably install a 225mm disc. However he can't fit a 225mm pressure plate due to its step height which differs from a 215mm pressure plate, which is what he should be using on this flywheel.
I have a 225mm disk and a 215 mm pressure plate available, however the rotating assembly is off a '83. Is it alright to use this flywheel with said disk and pressure plate? I now have an '85 flywheel that I can use to replace, but I'm afraid of affecting something inside the assembled motor (ie pinching something or moving endplay).
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Old 10-15-18, 10:02 PM
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Flywheel won't change your endplay. You can (and should) put the correct flywheel on the engine. My only question is did your builder use the front counterweight for the flywheel he installed or was it correct for the rotating assembly?
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Old 10-15-18, 10:45 PM
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Originally Posted by diabolical1 View Post
Flywheel won't change your endplay. You can (and should) put the correct flywheel on the engine. My only question is did your builder use the front counterweight for the flywheel he installed or was it correct for the rotating assembly?
Rotors and e shaft are from an '83 as those were the only good ones I could source, counterweights and the rest of the motor are original from the '85.
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Old 10-15-18, 11:10 PM
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You should be good then.
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Old 10-15-18, 11:40 PM
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Originally Posted by diabolical1 View Post
You should be good then.
alright, Iím gonna stick with the 225mm disk and 215mm pressure plate, thanks for the help!
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Old 10-15-18, 11:50 PM
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Whoa. Whoa. Wait ... I was only responding to your question about changing the flywheel. I'm not sure about the clutch question. I've been under the impression that the 215 plate will not work with the 225 flywheel, but I've never had to see for myself.
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Old 10-16-18, 01:34 AM
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Originally Posted by diabolical1 View Post
Whoa. Whoa. Wait ... I was only responding to your question about changing the flywheel. I'm not sure about the clutch question. I've been under the impression that the 215 plate will not work with the 225 flywheel, but I've never had to see for myself.
ah gotcha my mistake, thanks for the heads up. So just to be on the safe side, changing the flywheel would not only NOT affect end play, but it wouldnít pinch any bearings or other internals inside?
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