Clutch pressure plate bolt thread pitch?
10-25-19, 05:57 PM
#1
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Clutch pressure plate bolt thread pitch?
Was in the process of changing out my clutch but ended up damaging my flywheel.. Ordered new clutch and 11.5 light flywheel ... ran into an issue with the flywheel having paint and clear in the threaded holes (6) for the clutch pressure plate, bolts will only turn approximately 3/4 turns before it stops.. been checking on line to see what the bolt size/thread pitch is for the stock clutch pressure plate bolts so I can get the correct size tap to clean out the holes.. tried contacting the seller/gripforce with my issue, but have yet heard back from them in regards to this..
question is: does anyone know what the correct tap size is for the stock clutch pressure plate bolts? (this is the only info I was able to find, 14 mm the diameter is 8mm the pitch is 1.0)
question is: does anyone know what the correct tap size is for the stock clutch pressure plate bolts? (this is the only info I was able to find, 14 mm the diameter is 8mm the pitch is 1.0)
Last edited by 7XRXSN; 10-25-19 at 06:15 PM. Reason: additional info
10-26-19, 04:07 PM
#2
Rotary Freak
I'm not sure going off what the stock flywheel uses for fasteners is all that helpful.
Surprised new pressure plate bolts wouldn't come with a clutch/flywheel kit actually, but I'd try a common 8x1.25 bolt in the hole or 5/16 UNF first up before assuming metric fine. I don't understand a company coating even the non friction part of a flywheel in paint, eff me!
Surprised new pressure plate bolts wouldn't come with a clutch/flywheel kit actually, but I'd try a common 8x1.25 bolt in the hole or 5/16 UNF first up before assuming metric fine. I don't understand a company coating even the non friction part of a flywheel in paint, eff me!
10-26-19, 07:05 PM
#3
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I was suprised also .. if it doesnt use stock bolts they should provide the correcr ones, there was no instructions so im trying to see what bolts/thread pitch they used... even the teeth was pouder coated 🤷🏻*♂️ Maybe to keep it from rusting i suppose
10-27-19, 12:18 AM
#4
Rotary Freak
Most I've come across new, come oiled or in greased brown paper, which means a degrease before installation. That powdercoat being under bolt heads doesn't inspire confidence either, especially around the attachment to the counterweight.
Most of the japanese kits usually supply new bolts for these high stress applications. 8x1 has been default Mazda for ages. A unf 5/16 would be almost indistinguishable if they've tapped imperial. You might be able to count thread with a magnifying glass and measuring thickness, to work out if they've gone M8 rather than fine though for a rough and ready elimination on that side.
Most of the japanese kits usually supply new bolts for these high stress applications. 8x1 has been default Mazda for ages. A unf 5/16 would be almost indistinguishable if they've tapped imperial. You might be able to count thread with a magnifying glass and measuring thickness, to work out if they've gone M8 rather than fine though for a rough and ready elimination on that side.
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7XRXSN (10-27-19)
10-27-19, 05:47 PM
#5
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So after digging the clear out of the threads 8Mx1 and 8Mx1.25 stops within 4-5 threads or so but 5/16in-24 threaded fine..
Last edited by 7XRXSN; 10-27-19 at 05:52 PM.
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