[DeTomaso] Vacuum booster

[JDeRyke at aol.com]

In a message dated 6/15/11 4:54:25 PM, rob at dumoulins.net writes:

> You bring up an interesting question.  Do stock Pantera vacuum-assists 
> have any residual pressure?  If my car were currently running (same long 
> story), I guess I could check.
> 
That connector on the bottom where the vacuum line plugs in, is a check 
valve. What sometimes happens is, the engine vacuum line sucks oil, and 
eventually the oil works its way up front. If it gets inside past the check valve, 
the oil attacks the rubber diaphragm and it cracks. But the valve I had 
trouble with is housed in the back, protruding through the mounting plate behind 
the pedal. I may have overstressed it in mounting it originally; it's a 
complex plastic thingy, easily cracked. I was going to reproduce it in billet 
aluminum when Byars told me to send it back & they'd fix it. FWIW- J DeRyke