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scarry
27th April 2008, 08:54 PM
hi,has anyone noticed dust downstream of the air filter?am on my 3rd td5 & they all did this.have used genuine & coopers filters & same problem.all my td5s were bought new & the dealer ignored the problem.a few years back spoke to the lr dealer in alice springs & they had notice this problem but said they did not believe the problem was major .my commodore is perfectly clean downstream of the airfilter. after a recent trip to the cape iwas thinking about the problem &thought the dirt may be getting around the rubber seal on the air cleaner. i have now put grease around theseal & will see how it goes.cannot use an oiled air filter as have heard of oil getting on sensors & airfloww meters & causing problems. HAS ANYONE ELSE NOTICED THIS? look at the plastic grid across the front of the airflow meter & you will see what i mean.regards paul

dmdigital
27th April 2008, 09:06 PM
Had mine out the other week, spotless, no dust past the air filter and have never noticed this as a problem in 5 years.

Blknight.aus
27th April 2008, 09:12 PM
not in big red.

nothing oil or dust wise where it shouldnt be.

Slunnie
27th April 2008, 09:13 PM
Yep, mine has done this. It really ****es me off knowing that dust has gone through the engine. The filter feels firm when it goes in, but doesn't always hold the seal for some reason. The lid of the airbox also has a lip on it which can snag if you're not careful, but they leak despite checking this.

feral
27th April 2008, 09:43 PM
Yep, same here.

To me the concept is wrong. The filter should be into the lid and not the bucket.

The way it is now there is too much risk of the lid not being secured properly and allowing air to slip pass the seal and therefore into your engine unfiltered.

Maybe another rubber seal should be put into the bucket to fill the gap.

MickG
28th April 2008, 06:53 AM
Maybe another rubber seal should be put into the bucket to fill the gap.

That's excatly what I did and it seems to have worked.......need to change the seal agian soon though as it's squashed down a fair bit over time.

feraldisco
28th April 2008, 11:40 AM
yep, quite a bit of dust getting past my Td5 filter. Initially used some white teflon grease to get a better seal, but this is messy and I was worried about any effect on sensors. Have now inserted a twin-lipped rubber seal (used to stop drafts around doors) into airbox top which works fine.

LandyAndy
28th April 2008, 07:46 PM
I have found the same and brought it up a while ago.JustinC suggested it was common,his tip was to use rubber grease on the seal,fixes the problem.
Andrew

cjc_td5
29th April 2008, 08:41 PM
I have had heaps of problems with dust getting past the air filter on our D2 TD5 ever since new. It would only take say 10kms of reasonably dusty road for the air filter to become totally clogged and let dust through into the engine. I checked all of the seals in the air box which all worked fine.

I finally tracked the problem down to where the air was drawn from. The air box draws air from the gap between the inner and outer guard. The problem was that the front of void between the inner and outer guard (near the headlight) is mostly blocked by a plastic baffle. This meant that the air was drawn from the rear of the void right at the bottom rear of the guard. This is a perfect position to collect ALL dust that was thrown up by the front wheel. I made an air pipe (from 90mm stormwater pipe) that connected to the inlet as it came through the inner guard and directly drew air from behind the headlight. I have had no problems with dust in the filter since.

Now our D2 in standard except for a TJM bullbar, which did require removal of the front bumper. I am baffled though how our D2 picked up so much dust, but I have not heard of this issue with others????

scarry
6th May 2008, 07:17 PM
i have seen the baffle & believe it is to stop water getting into the air intake during water crossings.mine doesnt seem to pick up an excessive amount of dust.i replaced two air filters on a 7500 km dusty cape trip,one halfway through the trip & one at the end.
what i cant understand is if this problem is pretty common, why arent there more engines getting damaged?
anyway havent checked mine since i put the grease around it as havent done enough dusty ks:cool:

Redback
7th May 2008, 07:09 AM
I'm using a Uni Filter in my TD5, it fits and seals alot better in the airbox compared to the standard paper filter, for really dusty condition i have a Donaldson Pre-cleaner.

Baz.

scarry
7th May 2008, 04:44 PM
what is a uni filter? is it an oiled filter?

greg smith
8th May 2008, 06:24 AM
I have noticed alot of dust but on the right side,always carry spare filter. I am heading south to the big smoke[Bris] thought I would source snorkle anyone tried this?? Intend to try Brit off road,have had good results previously

Redback
8th May 2008, 10:27 AM
what is a uni filter? is it an oiled filter?

Yes an oiled filter.

Baz.

scarry
17th September 2008, 04:29 PM
yep, quite a bit of dust getting past my Td5 filter. Initially used some white teflon grease to get a better seal, but this is messy and I was worried about any effect on sensors. Have now inserted a twin-lipped rubber seal (used to stop drafts around doors) into airbox top which works fine.

Well,thought i would drag this thread up again.Put high temp grease around mine months ago,&checked it again yesterday,&dirt is still geting past.:(
Looking at this thread,looks like defenders are ok,more the discos are the problem,dont they have the same air box?

Feraldisco,did you put the rubber in the groove in top part of airbox,so then pushes onto top of filter seal.I tried a piece of fridge door seal,after removing the magnet,but would not stay in properly.Pics would be good:)

feraldisco
17th September 2008, 09:33 PM
I've actually finished up with draft-stop soft grey foam strip as this compresses easily and you can see from the compression of the foam whether you are getting a complete seal - and I am...no more dust past the airbox...

If I remember I'll try to post a pic this weekend...

feraldisco
20th September 2008, 07:21 PM
photo of seal around around perimeter of airbox cover

Slunnie
20th September 2008, 08:05 PM
Just out of curiosity, why the foam in the lid and not the base?

I was just thinking that if it did ever dislodge somehow, that the filter would stop it getting stuck in the MAF.

feraldisco
21st September 2008, 04:49 PM
true - it's possible that placing foam under the filter lip will raise the filter enough to form a better seal with the lid. However, I still don't think it will be perfect seal as the filter outer isn't as flexible/compressible as the draught-stop foam. I think there's a definite QC problem with these airboxes (um...completely unlike other LR parts :angel:) as some people don't seem to have any problems with this whereas mine is a pretty ordinary seal between the lid and base. I agree that in a hot environment the foam may break down in time although mine is coated in teflon grease so it shouldn't dry out/breakdown, but I'll keep an eye on it...

mikecmb
21st September 2008, 05:15 PM
I have found dust on the wrong side as well on the last two times I have changed the air filter. Was thinking a snorkel may help as the pick up between the guards sucks in sand when on the beach.

Mike

scarry
21st September 2008, 05:31 PM
Just out of curiosity, why the foam in the lid and not the base?

I was just thinking that if it did ever dislodge somehow, that the filter would stop it getting stuck in the MAF.
I was thinking the same,but under the filter,the air on side,the lip is very small,hard to get the foam to stick to the lip.I recon a few real small g clamps around the edge of the filter box holding the top & bottom of the air box tight together would be the best option,but hard to engineer,i will keep thinking,as said air box design is extremely poor.

Also if you push down on top of assembled airbox,you can feel it squeeze up tighter.

You could also screw the top & bottom up tighter with sef tappers around the edge of the assembled airbox,but is a bit bodgie.

Slunnie
21st September 2008, 06:13 PM
Oh well, I'd better put that on the "to do" list also. The other thing which I'm thinking, is to use a V8 box also, as they have no duck bill which partially devalues the snorkel. Actually, no hiclone also, so it will breath better.

scarry
21st September 2008, 06:30 PM
Do we know if the v8 airbox seals correctly?The hiclone thingy may also be there for a reason.
The other thing i am thinking is that the actual pressure in the airbox in the diesel may be lower,therefore increasing the issue compared to a petrol.I could be wrong here as i am no mechanic any ideas?

Slunnie
21st September 2008, 06:49 PM
Do we know if the v8 airbox seals correctly?The hiclone thingy may also be there for a reason.
The other thing i am thinking is that the actual pressure in the airbox in the diesel may be lower,therefore increasing the issue compared to a petrol.I could be wrong here as i am no mechanic any ideas?
I would have thought that the sealing is the same between the V8 and TD5 - I'm pretty sure (perhaps incorrectly) that the top half of the lower box is the same. I would also expect the TD5 would have a lower pressure in the box due to the hiclone and I would assume the TD5 pulls similar or more air when on boost.

The hiclone spins the dust out which drops out the bottom.

slug_burner
21st September 2008, 06:59 PM
Dusted motor:mad:

Yes I too have had the dust on the wrong side of the TD5 filter. My LR specialist put it down to poor workmanship (ham fisted) by the previous service person. My box was distorted. Replacement box was about 3 c notes. Was also advised to use a snorkel to reduce the damage when the problem happens again as where the air is drawn from currently is one of the dustiers options they could have chosen.

feraldisco
22nd September 2008, 12:36 PM
I was thinking the same,but under the filter,the air on side,the lip is very small,hard to get the foam to stick to the lip.I recon a few real small g clamps around the edge of the filter box holding the top & bottom of the air box tight together would be the best option,but hard to engineer,i will keep thinking,as said air box design is extremely poor.

Also if you push down on top of assembled airbox,you can feel it squeeze up tighter.

You could also screw the top & bottom up tighter with sef tappers around the edge of the assembled airbox,but is a bit bodgie.

I've also still got the wire mesh still in place pre-MAF, so any bits of foam that could get through that would be minute...

scarry
28th September 2008, 10:21 AM
Went to ormeau yesterday for a play,Son took his navara,his mate came with his Pootrol tray back,the last of the td 4.2's,has lockers etc.It was real dusty.We checked downstream of all air cleaners when we got back,both Nissans were perfectly clean,disco was dusty:(.Before we left i had put more grease around the air cleaner seal,and also on the o ring near the maf grill....

Today,i cut up some real thin strips of foam,which is sticky on one side,and stuck it to the lip on the bottom part of the air box.I then fitted the air filter into box,greased the top rubber seal on the filter,and then fitted the top of the air bix and clipped it all back together.

Should of got photos,but forgot all about it.

The grease i used my brother gets from work is silicone,waterproof,non melting,they use it for sealing on vacuum systms,it never runs,which is good.


Anyway i will see how it goes,and let you know.

scarry
13th September 2009, 07:22 PM
Just thought i would revive this thread:eek:

This is what i did before a very dusty cape trip.I fitted thin strips of foam to the lips on the bottom of the airbox,that the rubber air filter sits on.This makes the airbox top clamp on tighter.I also put heaps of vacuum grease on the top rubber seal of the air filter & also along the part of the top of the airbox that seals on the upper rubber seal of the air filter.

I also had a safari snorkle fitted.
The difference was amazing,no dust on the inner airbox top,just a very slight coating on the guard in front of the MAF.
Also one airfilter did the trip easy,last trip,same sort of distance,not as dusty though,used two air filters & they were completely clogged.

Hopefully the problem is now solved:)

Am kicking myself though,should have had a snorkle fitted years ago.:(
It not only reduces a massive amount of dust that goes into the airbox,on dirt roads,it also gives you a lot more confidence going through deep water crossings.

I recon the original air pickup in the inner guard,on the D2,picks up dust from the front wheels,which isnt good.

NobbyTD5
13th September 2009, 07:49 PM
Scary
Would you be able to post a photo ? - would like to replicate your seals

cheers
Nobby

scarry
13th September 2009, 08:33 PM
Scary
Would you be able to post a photo ? - would like to replicate your seals

cheers
Nobby

I will try....wont have time till the weekend

wesbt
13th September 2009, 08:47 PM
In regards as to whether V8 is same as TD5, I have noticed dust all the way up to throttle body on my V8 DII.

Changed filter and cleaned all the plumbing, within 5,000 km's fine dusting through all the piping between airbox and throttle body. My thought is that dust is getting sucked in around the seal between MAF and air box, as all sides of my air filter rubber were clean and showed no signs of dust going past. Inside airbox lid was also relatively clean, in comparison to MAF and futher downstream.

Has anyone tried aftermarket piping? Maybe a better seal?

Wesbt
'02 DII V8

cjc_td5
15th September 2009, 07:38 PM
I was having dust ingestion issues on my D2a from new. Any period on a dusty road would see the air filter inundated and dust get through the filter into the intake pipe/MAF etc. I sealed the box with vasoline and was certain that it was sealing properly.

I eventually tracked it down to where the air was sourced from. My D2a sources air from the void between the inner and outer guards. There is a large hole at the bottom rear end of the guard (adjacent the the front mudflap). Dusty air was being sucked from imediately behind the front wheel and up the guard void and into the air intake. I fabricated an alternate intake pipe that forced air to be drawn from behind the headlight (photo attached). I have not had any dust ingestion problems since.

Cheers,

QLDMIKE
20th September 2009, 08:08 PM
Had this problem on my Dad's. We cut the top off the pipe that comes into the airbox. So instead of all air being forced against the engine side (driver side) of the airbox and trying to pass up through a small part of the filter, the air passes through a larger area of the filter. We noticed that only the engine side (driver side) was becoming filthy and the rest of the filter was "cleaner".

Once we did this, problem solved and the filter has consitent "filth" trapped across it now.

*When I mention engine side (driver side) I am not talking about post filter, but the actual side within the airbox.