The "two-speed" master cylinder problem has happened to cars from long ago; I know of it on ones from the 50's (not VW, but typical American stuff of the day); it happened on my British cars (Triumphs, Sunbeam), and on both air- and water-cooled VWs. It can be a worn cup, a worn cylinder (rare; they usually corrode, instead, and have a really BAD stretch rather than a slightly less than OK one), even a small split in the lip of the cup can work OK during quick application, but will offer almost no resistance to slow pushing on the pedal. The symptom is so well-known that it's the classic way to diagnose a bad master cylinder. Ron ----- Original Message ----- From: "Eric Schumacher" <[email protected]> To: "Holland J. Phillips" <[email protected]>; <[email protected]> Sent: Friday, August 02, 2002 10:00 AM Subject: Re: [A2-16v] Master cylinder differences???
Hello Holland Thanks for your input. Since posting the question I was able to find the old Corrado G60 MC and exterior wise it is identical to the S 16V one in my car. The brake servo is also from the 16V so your statement that the cheap stuff bolts gives me the warm and fuzzies. I can only guess that the 16V MC includes the two proportioning valves that screw on there to account for the extra $. To warm up the thread a bit. The reason I want to replace it is that when pressing the brake gently, maybe like you would do standing at a light, the pedal would very slowly go to the floor. If you step on the pedal with even moderate force it will lock and stay there forever. There is about 35 K on the part. Interesting the Jjetta GLX clutch master cylinder did a similar thing. Everything looked perfect inside, cups just worn enough so that it would not hold gentle pressure. This happen to anybody?? Eric 85 GTI with VR6 Power At 12:25 PM 7/31/02 -0700, Holland J. Phillips wrote: >Eric Schumacher wrote: > > > Well actualy Corrado is the one I want to have to buy but the one I am > > replacing is a 16V. When I did my swap I had a well used corrado one and > > the 16V was new. My recollection is that they were the same but the price > > differences make me hesitate. > >I cross referenced the MC's for a '91 Corrado G60, '95 Jetta GL, and an '87 >Scirroco 16V, all w/o ABS, and the Corrado and Jetta MC's are the same, at >least as replacement parts. The Scirroco is different, probably because >it's an A1 based car (the outlets probably aren't in the same locations). >Now, VW uses different manufacturers for brake system parts on the same >models and years due to supply issues, so you may get different part numbers >for the same piece, even though they're actually interchangeable. An >interesting thing is that the MC's used on Jetta GLI 16V's, which came with >10.1" front brakes, as did the A3 4 cyl Jetta's, use different MC's. I >don't know if the GLI's had 19mm or 22mm MC's, but my guess is they had the >19mm part. >If the real question is will a Corrado or A3 Jetta MC fit on a 16V >GTI/Jetta, the answer is yes. Either one will work fine. I have a Corrado >MC on my '92 GTI 16V, and it bolted right up. > >--Holland >[email protected] >San Jose, CA > > >_______________________________________________ >A2-16v mailing list >[email protected] >http://maillist.myip.org/mailman/listinfo/a2-16v _______________________________________________ A2-16v mailing list [email protected] http://maillist.myip.org/mailman/listinfo/a2-16v
