k & N filter clean
- Thread starter garethp6
- Start date
You can get a K&N service kit with the correct cleaning fluid and red dyed filter oil to put back on the filter. Depending on how dirty it is it shouldn't take too long to do. All you do is spray the cleaner onto the filter, let it soak for a while and wash out under the tap, and repeat if necessary. Once fully dried, you carefully apply the red oil to the pleats, let it soak in and refit the filter. I think the kits are available from Halfords or other motor factors for about £15-20, but I've always taken my filters to work and do them there 
garethp6
Active Member
i want to re paint the engine again as it got marked when we had to change the engines over but nothing to worry bout the worst is done
this is when it just been finshed with the old engine
and this how it looks now got to repaint the inlet and re do the rockers and paint up those elbows but all in good time
this is when it just been finshed with the old engine
and this how it looks now got to repaint the inlet and re do the rockers and paint up those elbows but all in good time
I was given some black K&N's a few years ago. We only knew they were genuine when we scraped the muck and crud off the tops and saw the K&N logo. I washed them out under the tap and carefully picked out the bigger lumps (usually I dig out crusty black flies and wasps from the ones at work :shock: ) then soaked them in the cleaner and rinsed about three times, then applied the red dye twice and they came up like new . As long as the dirt hasn't damaged the filter material they should come up well and continue doing their job as advertised.
. As long as the dirt hasn't damaged the filter material they should come up well and continue doing their job as advertised.
garethp6 said:
I've had worse when I submerged mine in thick muddy water offroading :wink:
It maybe worth making some sort of shroud or something to put them in to help keep the filters clean. I think Chris (Chrisyork) hid some similar filters inside a standard airbox with a cool air feed from the front of the engine bay?
garethp6 said:
The pleats are soft and will go back into shape easily with some gentle finger pressure. Remember the red dyed oil is the filter material, as it is slightly sticky and catches the dirt, so the filter requires washing out and re-oiling peridically to keep it doing it's job.
colnerov said:
I guess only when they change from red (or whatever colour they come in) to a dirty colour as that would signify they are coated in dirt. There are theories that say a light coating of dirt is beneficial to them, as the pleated material is quite open compared to paper type filters. Basically, there's a reason why the flow more air than paper filters.
colnerov said:
Every car that I've had which has had the filter in a box in the intake has always filled with dead bugs, flies, leaves, twigs and other debris, but none of those had a basic pre-filter, such as a wire mesh cover that would stop all but the smaller flies getting in. I've not had a K&N in a box yet but it depends where the air feed comes from and if there's something to stop the large bits getting in as to how long it would last between being cleaned.
I have K & N air filters on my engine, and the instructions advise to clean and re oil every 50,000 miles (80,000km) or sooner if used in dusty conditions. I rotated mine through 180 degrees after 20,000 miles (32,000km) and I'll probably clean and re oil them between 40 and 50,000 miles.
Ron.
Ron.