CX
CITROEN
POLLEN FILTER SEALING
PROBLEM
Still chasing cabin fume
problems.
The success of eliminating Cabin fumes, by
new door seals, removing the badly sealing recycle duct &
plugging many holes (perhaps reducing the body interior airflow)
called for reinstallation of my old pollen filter. This is a PO item
& was fitted to all Australian CX's. I removed the temporary tape
seal on the filter drain hole in the bottom section of the
ventilation air box base & installed the filter on its cradle.
This quickly resulted in Cabin fumes again, only apparent after a few
miles & when pushing the car.
Immediate big disappointment, followed by
examination of the Filter Drain Tube seal, an area I have been always
very suspicious of. The old CX2400's dissembled vent box was used for
the examination, as its impossible to see inside the assembled one
without a borescope or mirrors.
Immediately the problem becomes obvious, the
seal abutment on the filter Drain tube is square to its tube and
cannot seal on the Vent box base!!! My CX2200, CX2400 & CX2500
ALL have this problem!!!!
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PO.
POLLEN FILTER with
CRADLE
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LOOKING TO
REAR
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The welded
washer at the bottom of the vent drain
tube is supposed to provide a backing for
a thin sponge rubber seal to abut on the
Vent Tower base.
This washer is
square to the tube.
It does not
sit squarely on the vent box
base.
It thus cannot
effect a seal between it & the base
unless a very thick sponge rubber is
used.
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LOOKING
SIDEWAYS
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