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Posted by: Movin6 Jul 6 2020, 09:36 AM

I am finally reassembling my 914-6 after the Dr Evil transaxle rebuild clinic. I do not recall seeing an O-ring between the flywheel and crankshaft when I dissembled.

What size is the O-ring? It appears to go in the inner grove as shown in the pic.

Appears to be 27mm OD, 22mm ID, 2.5mm cross section. Or should I say my kit has one about that size that fits.

Does anyone have the exact size?

Posted by: Movin6 Jul 6 2020, 09:38 AM

Pic of empty groove.

Posted by: roblav1 Jul 6 2020, 09:46 AM

Do you mean a dowel pin? If I recall correctly, no dowel pin. Only 6 brand new flywheel bolts.

Posted by: sixnotfour Jul 6 2020, 09:50 AM

Pilot Bearing


Attached image(s)

Posted by: Retroracer Jul 6 2020, 10:25 AM

Pilot bearing receptacle on flywheel. Pelican has them,

- Tony

Posted by: roblav1 Jul 6 2020, 10:37 AM

Ha ha! I thought his finger was pointing at a flywheel bolt hole!

Posted by: Movin6 Jul 6 2020, 11:45 AM

Thanks! I found my bushing and new pilot bearing. (This is what happens with long delays between take apart and put together, LOL.)

Not obvious where the O-ring would go? I assume between the flywheel and crankshaft? The outer grove is barely a grove, and is way more than the 58mm mentioned for OD.

I believe this is the original -6 flywheel. (Yes has been machined / resurfaced.)

Posted by: roblav1 Jul 6 2020, 12:50 PM

There's no o-ring in there at all. Do you mean the rear crankshft seal?

Posted by: Movin6 Jul 6 2020, 01:09 PM

I'm starting to think that. Maybe this diagram is for a 914-4? 58mm Item 18 in diagram below.

[attachmentid=751796] [attachmentid=751796]

Posted by: rgalla9146 Jul 6 2020, 04:00 PM

4 cyl.

Posted by: Movin6 Jul 8 2020, 11:00 PM

Thanks for all the replies. So no O-Ring on a 914-6. (Only on a -4.)

Is there a felt washer? If so, I assume it goes between the pilot bearing and the 6-hole washer / plate, correct?

Thanks!

Posted by: porschetub Jul 8 2020, 11:34 PM

Not that I know of but my flywheel isn't a 914/6 one but 911 2.2T,no "o" ring in mine.
The felt washer is built into the pilot bearing.
What concerns me is the machined surface that mates to the flywheel appears to have been sandblasted ?? is that just me or just the photo?.
Cheers.

Posted by: Movin6 Jul 9 2020, 12:17 PM

Looks like the felt washer is #6 in the "bush complete" listed as 901 102 025 01

Will check what's in mine when I remove the old bearing from the bushing, likely guess at size to replace it.

Posted by: Movin6 Jul 9 2020, 02:01 PM

No sandblasting - just happened to sparkle for the pic! ;-)