Hello:use pinch pliers to pinch off the 2 front and the rear brake flex hoses,if the master pressure or firmness stays up,then the master is not the problem,if it drops or is mushy,the master is the problem.This is a good way to check to see what part of the brake system is at fault without guessing. Be careful not to pinch the hose too tight,if you do you will collapse the brake hose internally.There are special pliers\tools that are available from lisle or other tool manufacturers that are for this purpose. ----- Original Message ----- From: "John Nasta" <[EMAIL PROTECTED]> To: "The Chevelle Mailing List" <Chevelle-list@chevelles.net> Sent: Wednesday, February 22, 2006 1:47 AM Subject: Re: [Chevelle-list] 69 Chevelle brake pedal drops to floor
> Good advice but that doesn't seem like the sort of thing that would suddenly > cause a problem. That seems more like something that would either work or > not work right from the get-go. > > > -----Original Message----- > > Check the new master cylinder. The new replacements have a different depth > hole for the push rod than the origingals. Change pushrod to right length > if has deep hole. Push rod for somewhere in 70's Malibu's usually about > right. Had this problem and all brake places around could not find. I > found my original master cylinder and compared the two. That is how I found > this problem. Might be something to look for. > > John > > > >
