Guest Pletch Posted November 18, 2012 Share Posted November 18, 2012 Is the brake booster supposed have a hissing sound when it's not applied?My dist point breaker plate is making noise at idle. It appears to be loose and moving near the vacuum advance. How is this portion supposed to be fastened? Link to comment Share on other sites More sharing options...
old-tank Posted November 18, 2012 Share Posted November 18, 2012 Somebody has good hearing!Anyhow the arm of the vacuum advance slips over a bushing on the breaker plate and that is capped off by the screwed down ground wire. If the dwell varies with rpm and load check the center bushing on the breaker plate for looseness. Old original rotors may fit very loose and rattle. A dab of heavy grease or silicone in the rattle area may tone it down for awhile.The brake booster probably should not have a hissing sound when not applied.Willie Link to comment Share on other sites More sharing options...
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