Reply to "missing pressure build up in brake system"

bosswrenchMember

As JFB mentioned, a host of problems comes with adapting brake master cylinders. Do you need to adjust the power booster brake rod? Its easy- unbolt the master cylinder from the booster but do not remove it. If the master cylinder pops away from the booster, measure the gap thus produced as best you can, and shim the master cylinder to the gap plus about 0.010". Bolt down and try your brakes.

In some master cylinder adapter blocks, there's a teflon guide bushing that fits way too tightly; it won't prevent brake use until things heat up in the front trunk. Then it can contract on the rod, squeeze it tightly and prevent the brakes from relaxing after use. Ream the plastic bushing out so there's plenty of clearance. I've done this for others on the road using a Swiss Army knife blade- the precision is not critical.

5/19/184:29 PM

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