Pressure plate wear., Causes. |
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Pressure plate wear., Causes. |
914Toy |
Mar 19 2020, 08:21 AM
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#1
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Senior Member Group: Members Posts: 718 Joined: 12-November 17 From: Laguna beach Member No.: 21,596 Region Association: Southern California |
To the brain trust: re slight shudder when engaging the clutch in first gear to begin moving forward.
The clutch assembly is a Sachs brand 228 mm and was installed new about two years ago onto a new flywheel on my 2.7 911 engine, and now has some 5,000 street miles on it. Also new was the throw out bearing (Sachs) and nylon bush under the clutch fork. I expected to see some clutch disk "burn" deposit on the fly wheel and/or pressure plate. To my surprise, while there were some small deposits on the flywheel and pressure plate, these parts and the clutch disk appear to be in near new condition - little measurable or obvious wear. However, the tips of the pressure plate "fingers (see pic) were worn down where the throw out bearing (TOB) contacts them. This suggests the TOB is slipping on the finger tips causing friction and wear. The TOB feels solid and spins freely like new. I don't believe this is normal wear. Any thoughts/advice? |
TravisNeff |
Mar 19 2020, 01:00 PM
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#2
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914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region |
OK, that is what I read elsewhere about bottoming out, I have a 2.7 too. Here is the washer/spacer I was talking about.
Attached thumbnail(s) Attached image(s) |
914Toy |
Mar 19 2020, 03:17 PM
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#3
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Senior Member Group: Members Posts: 718 Joined: 12-November 17 From: Laguna beach Member No.: 21,596 Region Association: Southern California |
OK, that is what I read elsewhere about bottoming out, I have a 2.7 too. Here is the washer/spacer I was talking about. The flywheel side facing the clutch disk has indents for the bolts - so no place for such a washer and in any case placing it there would not change the longitudinal distance from the crankshaft. So not the side for such a washer and also fo much more serious issues. The flywheel side facing the crank shaft is shown in the pic below. I believe the indent for the crank shaft to fit in is exact and is critically required to center and align the flywheel to the crank. The indent is 4mm deep. So placing a 4mm or even a 3mm washer/spacer in there would be a serious mistake as centering and aligning the flywheel would be compromised. Perhaps you are thinking of the Type 1V set up? Attached image(s) |
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