Taking the Airbox Out - RHD Diesel

[DCPU]

I guess the days of an oil bath air cleaner that could be maintained without any tools (well maybe a 10mm spanner if you wanted to take the top part off) have long gone; but the Grenadier airbox and fixings left be a bit underwhelmed.

I started with unclipping the air sensor:


And then 6mm jubilee clip on the output side of the airbox:


There's then 6 pozidrive no.3 screws around the top of the airbox, all are held captive so don't try and take them out:


Lift top off and air filter is visible:


Lid is quite a strange affair:



And contains this attached second chamber, held on with two Torx screws, with it's own part number:



The lower part of the airbox has a piece of foam in:

 

[DCPU]

which doesn't even conform to the lower shape of the airbox:


The lower part of the airbox is removed by by pulling upwards. The base is held in place by 3 pronged feet pushed into rubber grommets in a metal base plate (only 2 shown here, as the 3rd grommet came away with the base):


Underneath the base:


There is a soft rubber connecting section between the intake of the airbox and the plastic intake section that runs through the inner wing to the external intake:



Note hole in base between the two feet.

Airbox part number:

 

[Miki]

Good work ... but why ?

 

[DCPU]

Installation is just the opposite. A little fiddly, but I found locating the lower front foot first and then swiveling it around to locate the other two rear feet positions helped.

The only real hinderance was the output cable from the Red Winches circuit breaker (only for those that optioned the high load switch pack) which fouls the front edge:


And maybe check the captive screws on the airbox lid - one of mine had the thread peeling away - wouldn't want that ending up on the topside of the airfilter on re-assembly:

 

[DCPU]

Good work ... but why ?

Firstly, because if you don't learn how these things come apart and then go back together in the safety of your own home, then it's that much harder when it's necessary and the location is not so convenient.

And secondly, I was trying to access the fuse box located between the inner wing and the brake fluid reservoir - unsuccessfully as it happens; so I need to find a different way in.

And thirdly, I was looking for a further high load relay that resides between the inner wing and the airbox.

And fourthly, if I wasn't doing this my Mrs would have had me hand sifting a builders bag of rough topsoil.

Just number 4. was enough...

 

[Jean Mercier]

Firstly,

And secondly,

And thirdly,

You really are a champion, I am an amateur but I like playing around ...

Fourthly ... we share the same ...

 

[Tazzieman]

Good work ... but why ?

You need to study anatomy before you perform your first autopsy.

 

[Miki]

Just number 4. was enough...

Fair enough ...

While you're there ?

Does the front bumper come off easily ?
Whats behind it ?
What are the mounting points ?

 

[DCPU]

I started that previously, but got told to put it back on and go and get paint from the DIY store...


Seriously, it looked like layer after layer of screws...

 

[CountyV8]

OoooooooooooooH I feel like a metal bumper is on its way

 

[AnD3rew]

Thanks for doing this, in some aspects it does seem overly complex and not great for us who will be travelling in very dusty environments and may want to regularly change filters on a trip. But I am a fan of the paper style filters over oiled foam which don’t provide nearly the same protection as paper. Some of the complex shapes may be engineered for air flow reasons. It’s normal to have a drain hole in the bottom to let any water that may have come down the snorkel out. Does the odd bit of foam cover that drain hole? Am wondering if it is a kind of pre filter for any stuff that may come up through the drain hole?

 

[Barney]

You need to study anatomy before you perform your first autopsy.

says the pathologist

 

[Trialmaster]

I am expecting exploded diagrams on how to take my Grenny apart, so I can sell the blueprints to the Chinese to re-engineer it at this rate.

I remember the Chinese once took a Gulfstream G550 apart to backward engineer it and then asked Gulfstream on how to reassemble it.

 

[YellowLab]

I think this is one of the greatest pieces of this forum - we have lots of mechanically adept folks that are going to play around with this and find all sorts of solutions/improvements. I agree I want to become very familiar with the basics before I head out into the Mojave for an extended drive - that's always when things cross the line to bollix very quickly...

 

[Trialmaster]

I sincerely hope you didn't break any clips in this process?

 

[Tomdoc]

You need to study anatomy before you perform your first autopsy.

Correct - but as a surgeon I like to know the anatomy to avoid it going to autopsy!!

 

[AWo]

When I see it correctly, air intake in the bottom, the way to the engine in the top. Well done! That's the way to design an air filter in a 4x4. Never saw the foam thing before. It is for noise reduction or to keep small amounts of water from beeing sucked into the air filter or that the incoming air feels soft, warm and welcome? All? If that works, another good idea.

AWo

 

[Tazzieman]

Correct - but as a surgeon I like to know the anatomy to avoid it going to autopsy!!

I did 3 years as a surg RMO/reg before deciding pathology gave me free after hours!

 

[DenisM]

I did 3 years as a surg RMO/reg before deciding pathology gave me free after hours!

Q: What brings pathologists together as a group?
A: Esprit de corpse!

 

[Tazzieman]

Q: What brings pathologists together as a group?
A: Esprit de corpse!

You could say that about undertakers, erc