Metering Valves Causing Brake Problem
Short answer: The round metering valve under the master cylinder can fail (leaking, or sucking air) — one member went through four rebuilt units. Members who bypassed it reported the pedal felt firmer and they couldn’t tell a difference in normal street driving (on dry pavement). There’s a safety/originality debate, though — the engineers fitted it for a reason.
An ironic note: the front metering valve reduces front pressure so the fronts don’t lock before the rears; but A/C cars (~200 lb heavier in front) added a second (rear) metering/proportioning valve to keep the rear from locking. So if you move the battery to the trunk, add an aluminum intake and fiberglass hood, you’ve already changed the weight bias the factory valving assumed. Given the many successful Chevelle/Camaro-parts conversions with no real problems, many feel the valve adds little — but decide for yourself.
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Content last modified: June 13, 2026 at 10:06 am
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