Q4 flywheel resurfacing & pressure plate sourcing

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krrobrock
Posts: 9
Joined: Wed Feb 03, 2016 11:25 pm

Q4 flywheel resurfacing & pressure plate sourcing

Post by krrobrock » Thu Jan 07, 2021 6:49 pm

Hi all, I have the drivetrain back out of the Q4. I have not driven the much since replacing the disk and throw out bearing, but left the original pressure plate in place, and did not re-surface the flywheel. I wanted to spend the extra effort this time.

Has anyone resurfaced a Q4 flywheel before and can provide input into the process? It is stepped. Should I machine both the surface and the outer step down the same amount? The disk contact surface is only maybe 0.25mm above the unmachined surface, and I probably need to remove about that much material to get rid of the surface abnormalities. The machine shop suggested machining the plate down between the disk surface and the outer step to match the original profile. Any thoughts here?

Secondly- the pressure plate. I am unable to find these anywhere, even as a complete kit. Can anyone provide some pointers? My pressure plate surface has micro cracking, so I would prefer to replace it if at all possible.
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The clutch engagement was fine before I removed the engine, so I could probably do nothing and be ok. I don't really feel like taking this engine out again though!

Thanks,

Karl

finalfa
Posts: 43
Joined: Tue Jul 30, 2019 6:44 pm
Location: Espoo, Finland

Re: Q4 flywheel resurfacing & pressure plate sourcing

Post by finalfa » Thu Jan 07, 2021 8:17 pm

I resurfaced a couple of Q4 flywheels last summer, and I machined both surfaces equally. It is the logical thing to do.
Unfortunately I can't give any input on where to find a new pressure plate. I have a bunch of used ones laying around, some in great condition. If I remember correctly, one is driven around 500 km. If you are having a difficult time finding a new one, send me a pm.
Alfa Romeo GTV 6 2.5 -83
Alfa Romeo 156 2.5 V6 -02
Alfa Romeo 164 Q4 3.7 -96
Alfa Romeo 164 Q4 3.2 -94
Alfa Romeo 164 3.0 V6 -90

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Alfan
Q4 owner
Posts: 1231
Joined: Thu Oct 22, 2009 8:20 pm
Location: Denmark
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Re: Q4 flywheel resurfacing & pressure plate sourcing

Post by Alfan » Sun Jan 10, 2021 3:07 pm

Thanks for the info, good to know :)
1994 Alfa Romeo 164 Q4 Proteo Rosso 550.000km
1989 Lancia Thema 8.32 Verde Indy 270kkm
2001 Alfa Romeo Spider 3.0 24V Blue Lightning 65kkm
2011 Alfa Romeo Giulietta Multiair TCT Bianco Pastello 195kkm
2015 Alfa Romeo 4C Rosso Competizione 100kkm

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