Buckner99 Posted December 30, 2020 Report Share Posted December 30, 2020 1984 Nissan 720 Z24 Here I am again asking questions and feeling clueless, and too lazy to look through my Chilton book. I am thinking I need a new flywheel. Had a bad ground on my starter and it chewed it up pretty good got a gear reducted starter in there thinking it would be better. first starter blew apart so I put another one in, well this one is starting to go bad again too. I thought the little wear on the teeth wouldnt hurt. Anyway, I've been looking at flywheels to buy at the local oreilly's (thats all we have for parts stores around here) and there are 2 different ones that have very different Bolt Circle Diameters. They also are a lot different for pricewise. Anyone could help me out that would be great.. 1 Quote Link to comment
datzenmike Posted December 30, 2020 Report Share Posted December 30, 2020 The 2.35 vs. 11.024 is obviously a misprint. The Z24 engine takes a 240mm clutch disc (9.45") so 11.024 must be the bolt pattern that holds the pressure plate. The 2.35 is likely the bolt circle for the crankshaft bolts. Well, you can just carefully hammer round and round the starter ring and drive it off. Turn it around to the unworn side and put back on. The trick is to put the flywheel in the freezer over night and warm the starter ring in the oven at 450 for 10 min then quickly assemble it and tap into place. Hell for $60 you get a flat clutch disc surface. 2 Quote Link to comment
Lockleaf Posted December 30, 2020 Report Share Posted December 30, 2020 Have them order both in for you. Compare them. Mike is right about the two bolt patterns and I doubt one is 12.5 and the other is 12.05 inches. Just a typo on one of them. The major factor is that Pioneer is a transmission name brand and power torque is the oreilly house brand. But if you look at them both, you can see if you need the upgrade. That is all if you don't do as Mike suggested and flip the ring gear. 1 Quote Link to comment
ShutterMeShort Posted January 4, 2021 Report Share Posted January 4, 2021 Check Rockauto.com as well. They have 8 selections including LUK, EXEDY, and the Pioneer you're looking at (for $179) Do the clutch and rear main while you're in there too - unless you like pulling your transmission. 1 Quote Link to comment
Stoffregen Motorsports Posted January 6, 2021 Report Share Posted January 6, 2021 Do either of those flywheels require to to return a core? I never return cores until I am certain that the part I bought is correct. I would just have a local machine shop install a new ring gear on the flywheel you already have. If it needs to be surfaced, they can do that too. 1 Quote Link to comment
banzai510(hainz) Posted January 6, 2021 Report Share Posted January 6, 2021 (edited) 1 hour ago, Stoffregen Motorsports said: Do either of those flywheels require to to return a core? I never return cores until I am certain that the part I bought is correct. I would just have a local machine shop install a new ring gear on the flywheel you already have. If it needs to be surfaced, they can do that too. Just what he said, a good machine shop can order you one or partsgeet or maybe rockauto had them , I seen them before Edited January 6, 2021 by banzai510(hainz) 2 Quote Link to comment
iceman510 Posted January 6, 2021 Report Share Posted January 6, 2021 Z22 flywheel the same or will work? I have one I will sell. I can measure any dimension you might need from it. 1 Quote Link to comment
datzenmike Posted January 6, 2021 Report Share Posted January 6, 2021 It will fit but yours is drilled to take a 225mm pressure plate. All Z24 are 240mm. On 12/29/2020 at 8:34 PM, Buckner99 said: 1984 Nissan 720 Z24 Here I am again asking questions and feeling clueless, and too lazy to look through my Chilton book. I am thinking I need a new flywheel. Had a bad ground on my starter and it chewed it up pretty good got a gear reducted starter in there thinking it would be better. first starter blew apart so I put another one in, well this one is starting to go bad again too. I thought the little wear on the teeth wouldnt hurt. Anyway, I've been looking at flywheels to buy at the local oreilly's (thats all we have for parts stores around here) and there are 2 different ones that have very different Bolt Circle Diameters. They also are a lot different for pricewise. Anyone could help me out that would be great.. The probable reason for the starter failures is the absolute crap quality replacements. For at least the same price you could have had your stock one re-built. The dealer mark up is almost $200 on a $330 wheel so a $100 wheel would be a fair quality. $60??? well ya gits what ya pays for. The ring gear is 12312-A8600.... $100 and is used on ALL four and six cylinder L and Z series engines. Again, you can do this yourself at home.... pop the starter ring off and flip it around to the good side. 2 Quote Link to comment
Jacob Sohayda Posted July 7, 2023 Report Share Posted July 7, 2023 Does anyone know what size bolts connect the flywheel to the engine Quote Link to comment
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