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Flywheel seal chewing out????
baja_01 - November 7th, 2013 at 05:49 PM

Hi All
I have a problem with my CrMo 200mm flywheel chewing out the main seals. I had the face of the Flywheel machined so I could get 3 shims in for 0.004" end play. When I put a seal in flush with the case it chews out straight away. I put a new seal in as far as it would go and you can see where the edge up from the lip of the seal was rubbing on the flywheel. Question is what do you try next? I have thought of getting the back of the flywheel machined. Any other suggestions?
BTW flywheel is an Empi 200mm, lightened and CrMo..........

grumble - November 7th, 2013 at 06:46 PM

Has the case been line bored,I had a couple done at a machine shop and experienced the same problem. The machinist cut the bearing inner flange instead of the case resulting in the seal running on the flywheel (this distorted the seal and burnt the face of the seal.Check the seal and if it has been fouling the flywheel you will be able to see the wear on the face.Also drive the seal about 3mm below flush.

baja_01 - November 7th, 2013 at 06:56 PM

Case line bored by Stan. No flange machined. Seal has been seated right in............Seal face isn't worn, more like the tapered bit just before the seal lip? I have heard the radius on the new flywheels isn't as sharp as the originals. I have a standard F/W that could be machined to try out.......

hellbugged - November 7th, 2013 at 07:40 PM

Try a different brand seal. Some are rubbish

psimitar - November 7th, 2013 at 08:41 PM

I'd try a std flywheel as EMPI stuff just ain't up to much these days. If the profile is too different to the orig VW then you'll have issues.

Also an OEM seal shouldn't hit the thrust bearing at all. I had my bearing machined to fit the case and genuine German VW seal had no problem fitting all the way in.

helbus - November 7th, 2013 at 08:53 PM

I have always used Elring seals

matberry - November 7th, 2013 at 10:16 PM

Quote:
Originally posted by helbus
I have always used Elring seals
Only

bajachris88 - November 7th, 2013 at 10:50 PM

Quote:
Originally posted by psimitar
I'd try a std flywheel as EMPI stuff just ain't up to much these days. If the profile is too different to the orig VW then you'll have issues.



I can vouch for this. The machine shop in the last couple months has been dealing with my rotating bottom end. The aftermarket flywheel runout was rediculous. Its fixed now, and was a combo of both run out in the flywheel and aftermarket crank.

The machine shop said they were both dogs. Sorted out now though, more $ later.

Have a machine shop check the flywheel runout, this could be chewing out the seal.

baja_01 - November 8th, 2013 at 06:08 AM

Thanks for the replies..I've tried Elring and others. I'll get the machine shop to check for runout.
Also try fitting a standard F/W.........

vwo60 - November 8th, 2013 at 06:54 AM

Check the OD were the seal runs, if it is over size it will roll the lip of seal over, this will generate more friction causing the seal to fail.