1500/1600
SU CARB SUCTION CHAMBER PAIR #163-66-2
If
you are planning a complete rebuild, it isn't complete
without these. You may be able to "fix" your old carbs, a
true rebuild brings ALL the parts back to serviceable
condition. Thirty years of the piston going up and down with
every vacuum change takes it's toll on these. The engine
vacuum raising the pistons is what correctly sets the
airflow and the mixture. These have sometimes been a
difficult part for us to obtain.
These
were removed from a brand new set of carbs from Hitachi
(original manufacturer); so they will be easier to install
on your carburetors then a set that has never been mounted.
It was evidentally not possible for Nissan to manufacture
these to such strict tolerances AND have enough slack to
just be able to slap them on a set of carbs. It typically
takes some work to fit them and not have the piston bind
when moved through it's operating range. This usually
involves sanding any resulting "shiny" spots inside the
bottom edge of the dome or the mating edge of the carb
throttle body with some emery paper or "crocus" cloth. It
takes patience; perhaps "sanding" is too strong a word! You
have to go slow and recheck constantly. Sometimes it is just
a matter of how the domes are tightened down.
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