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 151,000 miles & now sold
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......

Recently ordered an L322 pollen/cain filter (Britpart) and no arrow on the frame at all. Any thoughts as to which way round it should be? One side is grey (charcoal), the other is white. I imagine there will be others with the same issue given it's a common replacement part.

Click image to enlarge

Click image to enlarge

I've just fitted a Mahle Pollen/Cabin Filter. Must say I was a bit confused. Unlike yours it had a description on its front end - and I slid it in so that the writing was readable without standing on my head in the engine bay. I then had second thoughts because the direction of flow arrow on the filter was pointing down. At the time I didn't know that the direction of flow should be pointing UP, ie skywards, until I checked with fullfatrr experts. The moral of me story is: ignore the orientation of any words on the filter and insert it with the direction of flow arrow pointing up.