Vacume nipple on brake booster.
#2
I assume you are asking about the check valve that the rubber hose to the intake connects too. It can be replaced. If you replace it I would replace the rubber gromet for it at the same time...
#3
Yep, brake booster check valve. It is replaceable. Easy to break 'em while removing them.
477.611.933A for '87
191.611.933F for '84
rubber seal for both:
911.355.921.00
Porsche dealers, or other vendors should be able to supply these easy enough. Above numbers may have been superceded also. I cheated, I looked in PET.
477.611.933A for '87
191.611.933F for '84
rubber seal for both:
911.355.921.00
Porsche dealers, or other vendors should be able to supply these easy enough. Above numbers may have been superceded also. I cheated, I looked in PET.