Quote:
Originally Posted by jabstick420
thx diesel911,
I'm assuming a NOS lift pump assembly already has the small o-ring installed?
it is a bosch MB lift pump with old style pump that's made of thin aluminum.
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I forgot to post I am not sure what NOS actually means. To me it mean "no other source".
If it is a new Lift Pump then of course it is complete and no need to rebuild it.
On a used Lift Pump little O-ring wears out and or gets hard.
The Aluminum Hand Primer is a reputed souce of Air Leaks. Rule of thumb. If it leaks when you pump it replace it with a newer style real Bosh pump. Also the Aluminum is so thin that you usually dent or mangle it trying to get it unscrewed.