[Vwdiesel] a need for vacumn update, which bleeder to use

raymond greeley rgreeley2 at hotmail.com
Thu May 17 23:19:53 EDT 2007

Vac pump update,, I examined again and then changed a section of
of vac house which went into the dash (heater control maybe) and Lo, i had vacuum. the stiff brake pedal went back to normal for 
one trip around the block and then went to the floor, make up your
mind!. I had changed both rear brake cyl's last summer and never quite bleed them well enough. Not knowing the history it would seem that it is time to change the brake fluid. Working alone as i do has
anyone used a pressurized brake fluid changer they would recommend. The list of repair/maintenance is getting shorter.> Date: Wed, 16 May 2007 12:35:32 -0400> To: rgreeley2 at hotmail.com; vwdiesel at audifans.com> From: scameron at storm.ca> Subject: Re: [Vwdiesel] Starter issues comments and a need for vacumn.> > At 03:53 PM 16/05/2007 +0000, you wrote:> > >Vacumn, I have a 91 jetta Gl that sat for several months> >in the winter as i waited for warmer climes to change a> >water pump, new timing belt also, Now i don't seem to> >have any vacumn. Bentley seems to be hiding the info> >on it though the archives suggest a simle rebuild> >This is all good though in the back of my mind i am wondering if the "key"> securing the intermediate pulley> >could have not locked in and therefore the sproket spins on the shaft with> the vacumn issue begining there.> > > Caution, do not run the engine until this is investigated!> > The oil pump is driven off the bottom end of the vacuum pump, and if the> vacuum pump is stuck, there will be no oil pressure..> > It may be "frozzen" from being idle for a while. It's easy 1 bolt removal to> see if it turns freely.> Vanes may be sticking. Rock its shaft back and forth gently and it will come> free.> Make sure its tab is properly aligned with the slot in the oil pump shaft on> re-assembly.> > Since the iintermediate shaft is only run by friction on the bacck of the> timing belt, it may bee slipping on the pulley. Can you turn the shaft by hand?> > Have you properly tensioned the timing belt since changing it?> If its loose, it wont drive the oil pump and vacuum pump.> > Sandy> 
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