 Why the clutch disk was fouled: NOT the engine-to-transmission ("rear main") seal |
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| 98101 |
 Feb 11 2021, 08:45 PM
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Michael in Seattle  Group: Members Posts: 373 Joined: 7-October 17 From: Seattle, WA Member No.: 21,495 Region Association: Pacific Northwest  |
BACKGROUND: I bought a car built by a confused retiree in SoCal. It had a big engine with the wrong camshaft for its displacement. The Dellorto carbs were sort of randomly attached. The clutch slipped a lot, despite it being pretty new. I theorized that the clutch had been contaminated by engine oil leaking past the engine-to-transmission seal, which VW guys call "rear main seal" because they put their engines on backwards.
It turns out the clutch was fouled, but not from the engine. It looks like someone had used a transaxle on its last legs, and that had leaked its fluid into the spinning clutch and pressure plate. If you examine the right side of the photo you may see the radial lines the transmission fluid left on its way to ruin the clutch surfaces.  |
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| Spoke |
Feb 11 2021, 08:50 PM
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Jerry Group: Members Posts: 6,992 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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Bummer. Besides the transaxle seal and clutch, what other "while you're in there" items are you going to address?
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| 98101 |
Feb 11 2021, 10:37 PM
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Michael in Seattle Group: Members Posts: 373 Joined: 7-October 17 From: Seattle, WA Member No.: 21,495 Region Association: Pacific Northwest |
QUOTE(Spoke @ Feb 11 2021, 06:50 PM)  Bummer. Besides the transaxle seal and clutch, what other "while you're in there" items are you going to address? We're installing a Dr. Evil tranny and Tangerine Racing linkage. If practical we'll get at the pushrod tube seals leaking some oil. It would have been much cheaper to buy a car that's already been done right. |
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| brant |
Feb 12 2021, 07:28 AM
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914 Wizard Group: Members Posts: 11,641 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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I’ve actually had more leaks and wet clutch discs from tranny output shaft seals than I’ve had from engine rear main seals over the last 30 years. Although I’ve had both
That trans seal is a maintenance item |
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| 914Sixer |
Feb 12 2021, 07:40 AM
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914 Guru Group: Members Posts: 8,912 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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The new replacement seals for the transmission and engine are NOT made the same way as the factory ones. It is an item that has been addressed in years past.
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| rgalla9146 |
Feb 12 2021, 08:02 AM
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Advanced Member Group: Members Posts: 4,570 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
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You may have a flywheel problem too.
It may be the angle of the picture but it appears there is greater wear at the perimeter of the disc than there is towards the center. Has the flywheel been machined ? properly ? |
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