Taking the Airbox Out - RHD Diesel

DCPU · Jun 8, 2023

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 · Jun 8, 2023

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 · Jun 8, 2023

Good work ... but why ?

DCPU · Jun 8, 2023

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 · Jun 8, 2023

Miki said:
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 · Jun 8, 2023

DCPU said:
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 · Jun 8, 2023

Miki said:
Good work ... but why ?

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

Miki · Jun 8, 2023

DCPU said:
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 · Jun 8, 2023

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 · Jun 8, 2023

OoooooooooooooH I feel like a metal bumper is on its way

AnD3rew · Jun 9, 2023

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 · Jun 20, 2023

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

says the pathologist

Trialmaster · Jun 20, 2023

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 · Jun 21, 2023

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 · Jun 21, 2023

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

Tomdoc · Jun 21, 2023

Tazzieman said:
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 · Jun 21, 2023

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 · Jun 21, 2023

Tomdoc said:
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 · Jun 22, 2023

Tazzieman said:
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 · Jun 22, 2023

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

You could say that about undertakers, erc

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Taking the Airbox Out - RHD Diesel

DCPU

DCPU

Miki

DCPU

DCPU

Jean Mercier

GG#920

Tazzieman

Miki

DCPU

CountyV8

AnD3rew

Inch deep and a mile wide.

Barney

Trialmaster

YellowLab

Trialmaster

Tomdoc

AWo

Tazzieman

DenisM

Tazzieman

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