Reply to "Brake Booster Check"

jb1490Member

With the booster out of the car and on the bench, the only thing that you can check is to see if the booster will hold a vacuum. Evacuate the booster to around 20 inches and stop. It should not drop more than 1 inch in one minute. If it drops more than that, then you either have a leaking diaphragm, or a leaking test connection. Also test the check valve.

John

4/12/111:28 PM

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