MX-3 K8 with a MX-6 or Probe V6 Clutch?

UKMX-3 · Post by **UKMX-3** » June 30th, 2005, 9:42 am

Guys my clutch is dead, i need a new one and getting an aftermarket clutch for the MX-3 is virtually impossible in the UK.

I know the whole K series engine interchangeability is legendary on this site so please dont flame me for asking this question, but,

Will a standard or perfromance clutch from an MX-6/Probe fit on without any modifications?

Thanks in advance for any help!

mxmaz · Post by **mxmaz** » June 30th, 2005, 11:21 am

Post by **Custommx3** » June 30th, 2005, 11:29 am

seconded.

Nd4SpdSe · Post by **Nd4SpdSe** » June 30th, 2005, 1:14 pm

That's what I'm using

ccreech · Post by **ccreech** » June 30th, 2005, 2:27 pm

When you do a 2.5 swap...you usually have to use the 1.8 flywheel...since Mellinia's were all automatics. So without a doubt it will work. Same flywheel, same tranny.

What are you getting? ClutchMasters? ACT?...

solo_ryder · Post by **solo_ryder** » June 30th, 2005, 4:36 pm

I am running the PGT clutch and its abit better, ALOT cheaper

tk2269 · Post by **tk2269** » June 30th, 2005, 11:56 pm

wat kinda of car is a PGT clutch from?

JWMX3 · Post by **JWMX3** » June 30th, 2005, 11:59 pm

tk2269 wrote:wat kinda of car is a PGT clutch from?

Ford Probe GT

UKMX-3 · Post by **UKMX-3** » July 1st, 2005, 3:44 am

BUT.....

I looked at the technical specs and the MX-6 Clutch has a larger Driver Plate, and a the input shaft diameter is slightly bigger to.

I know im going over old ground here, but does it definatley fit in there, bolts in just like the stock K8 clutch?

mmac · Post by **mmac** » July 1st, 2005, 4:44 am

Definitely

I've got MX-6 clutch fitted to mine

100% interchangeable, no mods required

UKMX-3 · Post by **UKMX-3** » July 1st, 2005, 4:52 am

Well thats good enough for me, thanks guys, will order something today!

georgechicken · Post by **georgechicken** » July 1st, 2005, 7:30 am

Just curious, where did you see that the input shaft is different? That's totally untrue (when speaking of the K-series motors and like transmissions). Like so many others here, i've put mx-6/pgt clutches in many Mx-3's. The difference is in the clutch disc. The PGT/mx-6 uses a disc 225mm in diameter, whereas the mx-3 is 215mm. (or is it 215/205?... theres a 10mm difference either way). The friction surface area is hardly enough to quibble about (yes, it helps, but it's not a tremendous difference), but the great part is that the PGT/mx-6 clutch set is far more widely available, and typically a bit less expensive... win-win-win... BUT!! MAKE SURE you have your flywheel resurfaced by a REPUTABLE SHOP that is known for their quality flywheel machining. The reason is that your old smaller clutch 'dug' into the flywheel just a teeensy bit, but if you put the new larger clutch in, you'll have an uneven surface for the disc to get clamped against. In turn, you'll have piss-poor performance, and a large deal of chatter. You'll likely not be able to see the 'groove' the old clutch made (unless you were just brutal on it), but it is enough to cause problems. It is ALWAYS advisable (and recommended by this shadetree grease monkey)to have your flywheel resurfaced ANY TIME you remove the clutch. However, if you go to http://www.partsamerica.com, I believe you can get a new (well, remanufactured, but good as new) flywheel for about $70 USD, and you'll spend $35-50 USD to have your old one resurfaced. The overwhelming majority of the clutches i replace reveal a flywheel ridden with stress cracks, heat scoring/spotting, pitting, etc, so be prepared to buy a new one anyways... You'll thank me later... small price to pay now compared to the extra labor you'll spend redoing it later. Good luck!

Daniel

UKMX-3 · Post by **UKMX-3** » July 1st, 2005, 10:27 am

I found my info on a http://www.speedways.co.uk

never used them before so it may be total rubbish,

what i found was the

MX3 had a 22 spline/220mm Driveplate Clutch, with 25.2mm Input shaft Diameter

MX6 had a 22spline/228mm Driveplate Clutch, with a 24.3mm Input Shaft
Diameter.

If its wrong I appologise, not my fault, i tend to trust suppliers.

Next

Are you saying its best to change your flywheel at the same time as ur clutch always? or just if you are swapping size?

georgechicken · Post by **georgechicken** » July 2nd, 2005, 2:17 am

No need to apologize for someone else's error... That's not knowledge that many folks have, much less that they research...

The input shafts are the same... If they weren't, then I'd have several miracle cars running around out there

and I believe that I just figured out where the error is... The difference is in the OUTPUT shafts... The CV axles are different between the cars, but the transmission input shafts identical... and that measurement sounds about right for the center shafts of the axles...

I'm saying that it's always best to have your flywheel resurfaced anytime you remove the clutch (whether replacing it or not)... granted, it's not always necessary, but it's a good idea... now, if you're changing to a larger clutch, then it's necessary to at least resurface the flywheel, but I strongly suggest just getting a new flywheel. The only time a new flywheel is required is when the flywheel's friction surface is worn below Mazda's spec, when it's warped beyond spec, when it's cracked beyond tolerance, or when it's pitted past machining spec.... or when the ring gear is broken or damaged... or if you've dug grooves into the flywheel.. or any condition that prevents the flywheel from being machined to within mazda specification.... It's worth the $$ though.

Daniel

Rick Johnson · Post by **Rick Johnson** » July 6th, 2005, 3:17 am

Thats the difference, the K8 clutch is 1 cm smaller total and doesn't use the outer edge of the flywheel, go for the bigger clutch.