 O ring behind the front crankshaft seal revisited |
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| Geezer914 |
 May 26 2022, 06:36 AM
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#1
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Geezer914  Group: Members Posts: 2,150 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States 
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I have 2 O rings that fit over the nose of the crankshaft behind the front seal. I see no purpose of this o ring as it just sits at the front of the crank shaft. What is it supposed to seal?
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| mate914 |
May 26 2022, 06:42 AM
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#2
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Matt Group: Members Posts: 915 Joined: 27-February 09 From: Eagles mere, PA Member No.: 10,102 Region Association: North East States
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It might keep moisture out....
Matt (IMG:style_emoticons/default/flag.gif) Pro American energy QUOTE(Geezer914 @ May 26 2022, 08:36 AM)  I have 2 O rings that fit over the nose of the crankshaft behind the front seal. I see no purpose of this o ring as it just sits at the front of the crank shaft. What is it supposed to seal? |
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| Jake Raby |
May 26 2022, 09:25 AM
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#3
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
This O ring is critical. Without it oil will wick between the morse taper of the crankshaft and the crank hub. This results in oil being slung about in most cases.
You can't skip installing it. |
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| Geezer914 |
May 26 2022, 10:32 AM
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#4
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Geezer914 Group: Members Posts: 2,150 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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Which o- ring is correct?
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| 914fahrer |
May 26 2022, 11:46 AM
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#5
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Member Group: Members Posts: 103 Joined: 12-November 14 From: Berlin/Germany Member No.: 18,115 Region Association: Germany |
I hope this the correct one .The vw nummer is 021 105 279
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| ogdougy |
May 26 2022, 12:30 PM
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#6
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Newbie Group: Members Posts: 49 Joined: 9-May 22 From: Arizona Member No.: 26,536 Region Association: Southwest Region |
I can say with quite a fare bit of confidence. That without this o-ring on the flywheel. The motor will piss oil at a good rate.
PO didn't install one. I lost a quart of oil pretty quick. |
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| Jake Raby |
May 26 2022, 12:38 PM
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#7
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
QUOTE(ogdougy @ May 26 2022, 10:30 AM) I can say with quite a fare bit of confidence. That without this o-ring on the flywheel. The motor will piss oil at a good rate. PO didn't install one. I lost a quart of oil pretty quick. Yep.. |
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| Geezer914 |
May 26 2022, 04:11 PM
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#8
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Geezer914 Group: Members Posts: 2,150 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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Thanks everyone for the clarification. The thicker o-ring on the left is the correct one.
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