Fly Wheel Ring Gear

Fossil Son of Jim - Creator of Good

2,649 posts · joined May 2004 · 20 Mar 2007, 10:35 am

#579858

My Starter Motor Pinion Drive was heavily burred so I sourced a new one
Can anyone advise if the ring gear facing surface when new is flat or contoured similar to the Pinion Drive so when it throws out to crank the engine the drive and ring gear mesh nicely - or is it flat like on the non facing surface and the pinion drive just meshes nicely into it.
Also can the ring gear be heated, popped off the fly wheel and turned over so you have a fresh facing surface to minimise any possible damage to the new pinion drive? If so where can this be done.
Just being cautious as don't want to damage the new pinion drive on a possibly burred flywheel surface.

[ Edited on 3/20/2007 by Fossil ]

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1,418 posts · joined Mar 2005 · 20 Mar 2007, 9:47 pm

#580009

VW flywheel is solid.

DH

Fossil Son of Jim - Creator of Good

2,649 posts · joined May 2004 · 21 Mar 2007, 4:37 pm

#580131

That's strange as one I've seen looks as though the ring gear is a separate piece but this is a kombi and it may be different

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mackaymanx Custom Title Time!

1,611 posts · joined Jan 2006 · 21 Mar 2007, 5:00 pm

#580141

The flywheel for my subaru/vw conversion has a removable ring gear, so you must be able to get them somewhere.

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1,418 posts · joined Mar 2005 · 21 Mar 2007, 8:53 pm

#580207

Better clarify the engine type as standard VW manufactured Type I, II and III engines have solid flywheels.

DH

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 22 Mar 2007, 7:24 am

#580283

Cast iron Flywheels(most type 4) had removable ring gears.
I think the only one piece(steel) type 4 flywheel is a 914/late912 one.

Replacable ring gears are avaliable and they can be fitted with a shrink fit od .010" to .015"

But I know jack about type 4'sso one of the gurus can chime in.

I have flipped a few ring gears to achieve what you want to do no problems.

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1,418 posts · joined Mar 2005 · 22 Mar 2007, 3:36 pm

#580344

Makes it a bit easier to get info on a particular model if all info is given about the engine in question. The original post had no info on the model type.

DH

Fossil Son of Jim - Creator of Good

2,649 posts · joined May 2004 · 23 Mar 2007, 10:58 am

#580515

Many thanks all for your replies.
The engine is a 2 Litre Kombi Engine with a few modifications so expect the flywheel is a standard one. The starter motor also is the standard 091 911 023 model.

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