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+--- Thread: Flywheel movement when clutch depressed (/showthread.php?tid=8766)
Flywheel movement when clutch depressed - A7novice - 25-07-2023
I don't think I have a problem, but thought I would seek advice/comments of more experienced A7 folks.
I have a significant oil leak from back end crankshaft bearing, into clutch housing.
As long as the oil keeps off the clutch, I am happy to live with this leak.
But, I have checked the flywheel, when running, if I depress the clutch, the flywheel moves forward by a tiny amount, about 0.5 mm I estimate.
My query is, is this small amount significant, indicating a problem, or am I worrying about nothing.
RE: Flywheel movement when clutch depressed - Ian Williams - 26-07-2023
It usually indicates a broken front main bearing flange.
RE: Flywheel movement when clutch depressed - "Slack Alice" Simon - 26-07-2023
If the flange is intact, then movement is due to wear in the ball bearing or pair of ball bearings that locate the crank for-and-aft.
Or wear on the crank journal that allows it to move in the bearing - unlikely, and the movement would be greater.
RE: Flywheel movement when clutch depressed - Ruairidh Dunford - 26-07-2023
If your engine is fitted with ball and roller bearings, at the front of the crankshaft, it will always have some end float.
This is particularly noticeable with modern C3 bearings.