Quote:
Originally Posted by Goatracer1
.....Without the master bolted up that seal may leak.
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Quote:
Originally Posted by mgarblik
When you get your new one, here is a good test. Pull the vacuum hose off your regular daily driver with a vacuum booster and put a union in the hose to 3' of 3/8" vacuum hose. Start the car and charge your new booster with vacuum. Exercise the pushrod a couple times. It should move forward with minimal effort to prove the booster is working. Now shut the engine off and push the pushrod in again. You should get 1 to 2 easy pushes and then it should get very stiff. This proves the booster was really working. Now start the engine again and charge the new booster. Shut the engine off and carefully remove the vacuum hose only, not the check valve. Set the booster aside for a couple days. After a few days, push the rod and you should get at least 1 boosted push before it gets hard. That proves there are no vacuum leaks. If it passes, put it on. If it fails, well you have another defective Chinese booster.
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These two seem a little different, might help (at least me) to know if the unit can be tested without having it bolted to a master.
Mike