Why is there a vent hole in the cap of the clutch master cylinder?
04-24-2003, 11:49 AM
#1
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Why is there a vent hole in the cap of the clutch master cylinder?
On the plastic container where the fluid is kept there is a little vent hole why? can mostiure canin there and ruin the brake fluid which is what is in the clutch master cylinder?
05-01-2003, 07:13 PM
#3
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The cap isn't actually what seals the reservoir. The black rubber cup that's under it is what seals it, and the vent hole is to keep the cup from building a vacuum which would prevent the master cylinder from pulling in the fluid that it needs. The brake reservoir has a similar diaphragm setup.
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