Re: Vacuum filter location

[steveb@falcon.kla-tencor.com (Steven Buchholz)]

 # Correct. On my car it's a plastic hose, not rubber. ~8mm O.D.
 # It is connected to the intake mfld via a short(~40mm) rubber reducer.
 # Cut the hose before the check valve wherever you feel suitable.
 # Make sure that the plastic gasoline filter does not touch either the WG or the 
 # back of the head or bell housing otherwise it will melt.

As I reported earlier, I installed the filter on the spark plug side of 
the engine (no WG or head to worry about).  I cut the hose near a bracket 
that was already holding the line away from the bellhousing/steering gear 
so that now the bracket also helps keep the fuel filter in place.  My case
is for an '88 5kCSQW ... YMMV ...
 # 
 # Watch the direction too. You want to connect the mfld side to the spout that 
 # goes to the bottom of the fuel filter (usually the central one) as to let the 
 # oil precipitate on the bottom. The pick up spout should be the one from the top 
 # of fuel filter. It should be connected to the A/C programmer.
 # 
I actually have mine installed the other way around, and I think I did 
follow the TSB's recommendations.  By installing it with the offset port 
connected to the line going to the programmer and the filter oriented so 
that this port is at the highest possible point it means that the fuel 
filter can fill with oil before any goes down the line to the programmer.
Practically, it should be the case that whenever it reaches the center 
mounted port connected to the intake manifold that the oil should be 
drawn back to the engine ...

Someone else asked if there was some sort of check valve to ensure that 
on turbocharged engines the system remained under vacuum, the answer is yes.

HTH!

Steve Buchholz
San Jose, CA (USA)