If a pwr. brake booster is at 18" of vacuum, does anyone know how long the booster should hold that vacuum before seeping down? 1 min, 5 min, 15 min?
If it doesn’t hold vacuum, then there is a vacuum leak. They didn’t design these to leak vacuum. But if it’s a small enough leak, it may not be noticed, or it can be tuned out.
I had a '70 Estate wagon I removed the disc brakes from but didn't use the booster & assorted hardware that I put in my storage area. MANY years later someone needed an original disc brake power booster. When I removed the one way valve from the booster it still had vacuum in it & it had been sitting for many years. So IF the booster is in good shape with NO leaks & the valve is OK vacuum will hold for many years. Tom T.
Call Booster Steve who bench tests these 10 times a day! Power Brake Booster Exchange and Restoration @ 503-238-8882 Portland, Oregon Tell him Eric sent you..
See any problem with this vac line routing? One line off tee comes off the rear of intake for added vac. I know, 10 lbs in a 5 lb bag....
