Flywheel Shim to Measure End Play

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Dennis Vogel
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Flywheel Shim to Measure End Play

#1 Post by Dennis Vogel » Sun Dec 01, 2019 4:46 pm

I dug these pieces out of a box of parts I bought. ID is 50mm. OD is 60mm. Each is .5mm thick. I am guessing they are VW shims? Can I use these to measure flywheel end play before I buy a new shim?

Our original flywheel and shim were lost in shipping. So unless these work, I’m left to buy a new shim just to check the end play.
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1960 356 S90 Sunroof Coupe
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Martin Benade
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Re: Flywheel Shim to Measure End Play

#2 Post by Martin Benade » Sun Dec 01, 2019 5:02 pm

Do they match the diameter of the #1 main bearing? 36 hp vw shims would, later ones will be too large diameter.

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Dennis Vogel
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Re: Flywheel Shim to Measure End Play

#3 Post by Dennis Vogel » Sun Dec 01, 2019 5:16 pm

Martin Benade wrote:
Sun Dec 01, 2019 5:02 pm
Do they match the diameter of the #1 main bearing? 36 hp vw shims would, later ones will be too large diameter.
The ID appears to be the same. The OD of the bearing is larger.
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1960 356 S90 Sunroof Coupe
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Martin Benade
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Re: Flywheel Shim to Measure End Play

#4 Post by Martin Benade » Sun Dec 01, 2019 5:48 pm

Those should work then for measuring.

Dick Weiss
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Re: Flywheel Shim to Measure End Play

#5 Post by Dick Weiss » Tue Dec 03, 2019 10:19 pm

A slight correction of flywheel shims;

All shims--including the thick S90, have 49mm ID x 65mm OD, except the S90 which has its 70mm OD to suit its
larger flanged 2-piece main bearing.

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Re: Flywheel Shim to Measure End Play

#6 Post by Martin Benade » Tue Dec 03, 2019 11:26 pm

Dick, that is confusing. Could you clarify it?

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Vic Skirmants
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Re: Flywheel Shim to Measure End Play

#7 Post by Vic Skirmants » Wed Dec 04, 2019 8:48 am

Dick Weiss wrote:
Tue Dec 03, 2019 10:19 pm
A slight correction of flywheel shims;

All shims--including the thick S90, have 49mm ID x 65mm OD, except the S90 which has its 70mm OD to suit its
larger flanged 2-piece main bearing.
Seems clear enough.

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Re: Flywheel Shim to Measure End Play

#8 Post by Martin Benade » Wed Dec 04, 2019 10:54 am

It’s been a while, s 90 has both a thick shim and a thin one used together?

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Re: Flywheel Shim to Measure End Play

#9 Post by Vic Skirmants » Wed Dec 04, 2019 11:00 am

Martin Benade wrote:
Wed Dec 04, 2019 10:54 am
It’s been a while, s 90 has both a thick shim and a thin one used together?
No; just one thick one. I have used a thick AND a thin on a S-90 when the correct thick one was not available. You have to be sure to install the thin one on the flywheel side!

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Re: Flywheel Shim to Measure End Play

#10 Post by Martin Benade » Wed Dec 04, 2019 11:10 am

Thanks. I was confused because Dick gave both diameters for the S 90 shim

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Re: Flywheel Shim to Measure End Play

#11 Post by Vic Skirmants » Wed Dec 04, 2019 11:44 am

Martin Benade wrote:
Wed Dec 04, 2019 11:10 am
Thanks. I was confused because Dick gave both diameters for the S 90 shim
He posted that all the shims were the same ID and that the S-90 had a larger OD.

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Re: Flywheel Shim to Measure End Play

#12 Post by Dennis Vogel » Wed Dec 04, 2019 1:07 pm

Vic Skirmants wrote:
Wed Dec 04, 2019 11:00 am
No; just one thick one. I have used a thick AND a thin on a S-90 when the correct thick one was not available. You have to be sure to install the thin one on the flywheel side!
When referring to a S-90 specific shim, is its use dictated by the case, crank, flywheel, or bearing?

We have a S-90 case, with 356C / 912 crank, 200 mm flywheel, and single-piece #1 main bearing.
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Re: Flywheel Shim to Measure End Play

#13 Post by Bruce Smith » Wed Dec 04, 2019 1:58 pm

Vic Skirmants wrote:
Wed Dec 04, 2019 11:00 am
You have to be sure to install the thin one on the flywheel side!
Why?
Bruce

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Re: Flywheel Shim to Measure End Play

#14 Post by MICHAEL FOSTER » Wed Dec 04, 2019 2:05 pm

Dick:

It might be a bit clearer if you said "All shims have 49mm ID x 65mm OD, except the S90 which has its 70mm OD to suit its

larger flanged 2-piece main bearing. "

Not being critical and I want you to know that I appreciate all of your substantial contributions and enjoy reading your posts!

Michael Foster
MICHAEL FOSTER

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Re: Flywheel Shim to Measure End Play

#15 Post by Vic Skirmants » Wed Dec 04, 2019 2:17 pm

Dennis; S-90 determined by crankshaft and bearing.
Bruce; the thin bearing has too small an OD to work with the S-90 bearing's larger flange.

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