[Vwdiesel] vacuum pump

[Roger Brown]

Scott Alexander wrote:
> We definitely replaced the diaphragm last time as it had the rip.  I
> believe we used the new check valves as well.  (I'd bought both kits as
> they weren't all that expensive and we were borrowing a shop overnight
> so wouldn't have a chance to leave the car sit until the parts arrived.)
> That's why I'm wondering if there might be something that I overlooked
> which would cause another failure so quickly after the last "rebuild".
> 
> Thanks,
> Scott

Still pull the pump for a look.  If it was like mine, it could have failed quickly.  In my 
case, there was a very intermittent case of blow by in the engine.  Every once in a while, 
the crankcase would get pressurized by it and that pressure hit the pump through the 
exhaust port hose (that connects to the block), or in another case oil mist from that same 
line rotten out the rubber diaphram.  My fix was to add a tee fitting at the pump and 
another at the valve cover breather hose.  Then I added a hose to tie the block, pump, 
valve cover breather and intake all into one open system.  That way, any crankcase 
pressure or oil fumes gets sucked into the intake and I had no more vacuum pump problems.

-- 
    Roger