Hi

Any guesses which way up the cabin pollen filter goes?
Various You tube videos show either way is correct, so can't believe those as one must be wrong.
From the dirt collected, I think the air flow is upwards, which is the opposite to the way it was fitted, and opposite to what would be the obvious which is sucking air from the plastic windscreen base down to the heater.

Any definitive answers?

Thanks,
Glen Previously......
Series 1 80, Series 3 88, Turbo 90, 300tdi 90, 110's with 200, 300, TD5
TD5 Disco, Disco 3, 200Tdi Disco - probably the best vehicle Landrover ever made,
Now 3x FFRR, some would say I should have learned by now......

From memory I agree the airflow is upwards.
For the filtration it doesn't matter which way round.
However dependant on the design of the specific filter, some have flexible "flaps" at the side that take up the clearance with the housing.
The filter should be orientated so that the flaps get pushed against the housing due to airflow - rather than the opposite direction where the flaps would collapse and allow air past. Paul,
2001 Discovery 2 TD5, 211,000 miles & climbing
2006 FFRR TDV8 Vogue 145,000 miles & climbing
Member of Midland (Land) Rover Owners Club, www.mroc.co.uk

To answer my own post, after studying the innards with a torch and a hoover, I can confirm the airflow is upwards.
And can recommend hoovering out the innards before fitting a new filter, something nobody seems to mention.

Best wishes
Glen Previously......
Series 1 80, Series 3 88, Turbo 90, 300tdi 90, 110's with 200, 300, TD5
TD5 Disco, Disco 3, 200Tdi Disco - probably the best vehicle Landrover ever made,
Now 3x FFRR, some would say I should have learned by now......