Member Since: 12 Feb 2021
Location: London
Posts: 141
Air Filter Element for FBH
Hi there! thanks of the invaluable resource and thanks to the forum I've managed to get the FBH working!
I've noticed there is an air filter element (little cylindrical black box) that is attached to most LR3 FBH but not on the LR4 units. I've read that it is a noise suppressing component for the air intake filter.
Is this necessary? does adding one to an LR4 FBH impede the airflow rate? is it an issue having this intake pipe exposed to the elements?Discovery 4
Oct 2015, 2016 build
SDV6 Santorini Black SE
New engine at 42k
Car camper
7th Mar 2024 8:23 am
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8223
I pinched the one off my D3 and fitted it to the D4 about 5 years ago, never had any problems or touched it since. It can when others can't,
It will when others won't,
It goes where others don't.
7th Mar 2024 2:11 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5036
Fitting one will not impede air flow, it's just an empty plastic cylinder without filtration.yµ (idµ - eAµ) ψ=mψ
7th Mar 2024 2:15 pm
HairyFool
Member Since: 04 Jan 2023
Location: North Essex
Posts: 672
A larger cylinder with smaller In and Outlet ports makes a good filter for sand etc. The air slows down after entry which allows the heavier particles to drop out into the bottom before the air carries on. It needs to be positioned with the outlet higher up.
Even better is a centrifugal filter which spins the air making the particles heavier so miss the central outlet port. With no filter element there is nothing to clog up. They just need emptying every so often
Its not unusual to find sand and grit to be in the bottom of the engine filter case which is not just because it has been impeded by the filter.A visitor from the dark side, my other vehicle is an is still an EV. Strictly speaking its SWMBO.
7th Mar 2024 3:32 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5036
There's no filter, it's just an air intake noise suppressor. The combustion chamber develops lots of carbon build up on its own, particularly during short run cycles.
Therefore a filter would be pointless, which presumably is why there isn't one. yµ (idµ - eAµ) ψ=mψ
7th Mar 2024 4:18 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8223
Just a silencer, but I don’t notice any difference It can when others can't,
It will when others won't,
It goes where others don't.
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