Welp, when driving the car home last weekend not long after i left New Plymouth i started to notice the blower fan was blowing a rather unpleasant smell. It got so bad that i had to stop and get an air freshener (it was hot so i had the fan on high).
The other day i purchased a new cabin filter, on the premise that it was probably stuffed. After reading plenty of LHD US G35 DIY guides for the filter i decided to rip into it today. I have written this as i had some trouble finding a step by step DIY guide for RHD Skylines as they are slightly different.
Step one is to remove the little panel under the glovebox. Just grab it at the front edge and pull down. It is held in by two hooks towards the front of the car, it needs to be gently pulled towards the rear of the car to release it.
Once that is off, open the glovebox grab the top edge and pull up towards the roof of the car. You should feel it pop out of the clips at the bottom edge. You then need to wiggle and twist to get the side pegs out of their slots. I found it was easiest to push the LH side of the glovebox towards the windscreen and then pull the RH side out towards the rear.
There is also the little retractable cord that needs to be removed. I gently wiggled and pulled and it came free.
Once that is out, i also removed the little side panel in order to see the panel clips for the next step. This just pulls off.
Ok, so now you have the covering panel
In order to remove this, there are two screws in the lower corners, and four along the top edge.
Interestingly, there was a sticker that indicated that the filter was last replaced in December 2014 at 52356KM (which it cant have been as the car is at 141000 now).
Anyway, with that panel removed, you are greeted by the blower fan and filter housing.
The covering panel is right in the middle and comes free quite easily. A clip on the LH side and then the panel is moved to the left to release it from its slots.
Once removed, this is what greeted me. A black filter that was certainly not correctly fitted.
Removed, it was clear why i had bad smells and bad airflow
And compared to the new filter
This is the new filter,
Slap the foam on the sides as per the instructions with the filter (they go on the two sides. The front is where "UP" is written). Gently slot it into the housing. It will go up on rails and sit at the top of the housing. It should sit flat, other than the front. The front will be lifted and supported by the front cover which has raised ridges to hold it.
Stick it all back together, which is reverse of disassembly, and away you go.
My fan now blows more air, is quieter, and best of all, actually smells fresh and clean. Mine also had the side effect of no longer having a misplaced filter blocking one of the vent flaps.