A line is then routed from the intake manifold to the brake booster, through a one-way check valve. The engine's vacuum acts on the diaphragm, providing assistance when the brake pedal is depressed.

A one-way check valve prevents this atmospheric pressure ... Interestingly, a vacuum leak in the booster can translate to a poorly running engine since its system of vacuum lines is all ...

It matters to your brake vacuum booster. If you are running disc/drum ... You need inline residual check valves in the front and rear brake lines too 2-pound for discs and 10-pound for drums.

Once the moisture thaws, the problem disappears. The component most likely to freeze up is the vacuum booster check valve. Cleaning or replacing it before your next winter trip might prevent this.

I have a 355 small-block Chevy in my 1971 Nova and just swapped on a set of used aluminum heads. I was told the heads have 180cc intake runners, 64cc chambers, 65cc exhaust ports, and 2.02/1.60 ...

The vacuum pressure ... of your car like the brake booster, distributor vacuum advance, and positive crankcase ventilation (PCV) and exhaust gas recirculation (EGR) valves. A vacuum leak generally ...

Inside the valve's main housing is a vacuum ... how much boost you'll be running and the physical space available for installation. Not all turbocharged engines are made for blowoff valves.