OK, now I have a starting point!

Is there any reason to leave the valve cover off when R&R ing the Vacuume pump?

I know nothing about the process so It's off to search the archives I go. I still have vacuume but I guess that may not be indicative of pending failure?

Thanks Much,
Stephen

__________________
85 300D 305K miles WVO(105K so far), Mine
82 300SD 235K miles BIO-D, Wifes
96 F250 SC PSD 4X4 285K MILES BIO-D, Ours
89 BRONCO 182K MILES sold
Finally Compression Ignition Only!