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Willit Stop · 04-03-2016, 09:28 AM

I'm not too familiar with the newer flatties but my '36 21 stud had a similar noise.It turned out to be a leaky vacuum brake piston/bore. At idle the piston would rattle back and forth. Start it up and when it begins ticking,pinch off (or disconnect) the vacuum hose. If the noise goes away you've found the problem.
59 A's might be different.I don't know.

04-03-2016, 09:28 AM	#2
Willit Stop Senior Member Join Date: Feb 2013 Location: Eureka Calif. Posts: 969	Re: M.D needs second opinion? I'm not too familiar with the newer flatties but my '36 21 stud had a similar noise.It turned out to be a leaky vacuum brake piston/bore. At idle the piston would rattle back and forth. Start it up and when it begins ticking,pinch off (or disconnect) the vacuum hose. If the noise goes away you've found the problem. 59 A's might be different.I don't know.