Re: DO NOT TRUST BTV

Posted by HH56 On 2009/11/14 19:47:35

I think we will have to wait until Matt has a look and hopefully there is something definitive seen. Just by the symptoms, I would bet the compensating valve didn't seal rather than the fluid being entirely sucked out. A floating speck of matter landing in the wrong place and time would do it or, as has been mentioned many times, since the valve spring is not part of any rebuild kit and is held on by a questionable clip, that also is a good possibility.

I notice that ABS power brakes as well as several others are selling dual master cylinder treadle vac replacements for the tri 5 Chevys using a modern dual diaphragm 7 inch booster. They claim it is a direct bolt in. The question is does anyone know if there is an internal size difference between treadlevacs. The pict Eric posted of a Chevy setup some time ago sure looked the same externally, and pictures from parts manual posted on Chevy websites asking for info looked same internally. I would think if internally the same and it works in a Chevy as direct replacement, with some changes to fitment in the Packard such as maybe an angle change to toe board or maybe a slight shift toward engine to clear frame and then add a remote fill setup, it should work in a Packard if there are no other differences.

I do believe if something that would fit with no major changes or relocation that screams out replacement could be found, more would take the plunge just to eliminate the possibility and controversy if nothing else.