Air Cleaner Dump Valve - LR90

R

RichardB

Guest

• Apr 18, 2006

• #1

Hi All,

After around five years of ownership I discovered
in the handbook the need to check the air cleaner
dump valve for blockage and condition.

This I attempted to do earlier today - I do not
have one and as far as I can tell never have since
purchasing.

Looking at the detail I assume that the engine has
been sucking in 'un-filtered' air all this time?

I guess that the damage is done and it's too late
to do anything about it now. I do about 4k miles
per year around mid Norfolk so it is likely that
quite a bit of dust has been inhaled into the NA
diesel engine.....

Is it worth buying a dump valve and fitting or
should I just plug the hole?

Regards

Richard

 

D

Dougal

Guest

• Apr 18, 2006

• #2

RichardB wrote:
>
> Hi All,
>
> After around five years of ownership I discovered in the handbook the
> need to check the air cleaner dump valve for blockage and condition.
>
> This I attempted to do earlier today - I do not have one and as far as I
> can tell never have since purchasing.
>
> Looking at the detail I assume that the engine has been sucking in
> 'un-filtered' air all this time?
>
> I guess that the damage is done and it's too late to do anything about
> it now. I do about 4k miles per year around mid Norfolk so it is likely
> that quite a bit of dust has been inhaled into the NA diesel engine.....
>
> Is it worth buying a dump valve and fitting or should I just plug the hole?
>
> Regards
>
> Richard

The dump valve will be on the 'dirty' side of the filter - no damage done.

 

R

RichardB

Guest

• Apr 18, 2006

• #3

Dougal wrote:
> RichardB wrote:
>>
>> Hi All,
>>
>> After around five years of ownership I discovered in the handbook the
>> need to check the air cleaner dump valve for blockage and condition.
>>
>> This I attempted to do earlier today - I do not have one and as far as
>> I can tell never have since purchasing.
>>
>> Looking at the detail I assume that the engine has been sucking in
>> 'un-filtered' air all this time?
>>
>> I guess that the damage is done and it's too late to do anything about
>> it now. I do about 4k miles per year around mid Norfolk so it is
>> likely that quite a bit of dust has been inhaled into the NA diesel
>> engine.....
>>
>> Is it worth buying a dump valve and fitting or should I just plug the
>> hole?
>>
>> Regards
>>
>> Richard
>
> The dump valve will be on the 'dirty' side of the filter - no damage done.

Dougal,

Thanks for the clarification. Good to know I've
not caused damage to be done!

Regards

Richard

 

I

Ian Rawlings

Guest

• Apr 18, 2006

• #4

On 2006-04-18, Dougal <DougalAThiskennel.free-online.co.uk> wrote:

> The dump valve will be on the 'dirty' side of the filter - no damage done.

I thought there were two of them, one drainpipe style one on the dirty
side, and another whoopee cushion style one on the clean side on the
filter itself? ISTR having a branch sticking out of the one on the
air filter!

--
Blast off and strike the evil Bydo empire!

 

D

Dougal

Guest

• Apr 18, 2006

• #5

Ian Rawlings wrote:

> On 2006-04-18, Dougal <DougalAThiskennel.free-online.co.uk> wrote:
>
>
>>The dump valve will be on the 'dirty' side of the filter - no damage done.
>
> I thought there were two of them, one drainpipe style one on the dirty
> side, and another whoopee cushion style one on the clean side on the
> filter itself? ISTR having a branch sticking out of the one on the
> air filter!

Ian - your descriptions are lost on me!

The normal one is the rubber nipple on the underside of the main filter
housing (and/or possibly on any plumbing leading to it) to allow any
water that may have entered to leave under the influence of gravity.

I can't see a point in having any valve between the filter and the
engine. I've never seen one. The only thing sometimes installed in this
pipe is a filter restriction indicator (perhaps that's your whoppee
cushion!). There should be a sintered safety filter between the
indicator and the pipe to avoid dirty air bypassing the main filter
should the indicator get knocked off.

 

I

Ian Rawlings

Guest

• Apr 18, 2006

• #6

On 2006-04-18, Dougal <DougalAThiskennel.free-online.co.uk> wrote:

> Ian - your descriptions are lost on me!

There are two water trap valves on my Defender, but now I think about
it they are both on the dirty side. One is on the pipe between the
air intake on the wing and the other is the one you've spotted on the
filter itself.

--
Blast off and strike the evil Bydo empire!

 

R

RichardB

Guest

• Apr 19, 2006

• #7

Ian Rawlings wrote:
> On 2006-04-18, Dougal <DougalAThiskennel.free-online.co.uk> wrote:
>
>> Ian - your descriptions are lost on me!
>
> There are two water trap valves on my Defender, but now I think about
> it they are both on the dirty side. One is on the pipe between the
> air intake on the wing and the other is the one you've spotted on the
> filter itself.
>

I'll have a look at mine this morning and report
back later.

Regards

Richard

 

R

RichardB

Guest

• Apr 19, 2006

• #8

RichardB wrote:
> Ian Rawlings wrote:
>> On 2006-04-18, Dougal <DougalAThiskennel.free-online.co.uk> wrote:
>>
>>> Ian - your descriptions are lost on me!
>>
>> There are two water trap valves on my Defender, but now I think about
>> it they are both on the dirty side. One is on the pipe between the
>> air intake on the wing and the other is the one you've spotted on the
>> filter itself.
>>
>
> I'll have a look at mine this morning and report back later.
>
> Regards
>
> Richard

Replying to own post.....

Removed the air filter cover to expose the base.
This revealed, as Dougal said earlier, a single
square hole leading to a short circular drain
pipe. Nothing is attached to the drain pipe - the
missing dump valve should be here...

On a positive note this is on the 'dirty side' of
the filter.

I'll order a dump valve and fit later.

Thanks for your replies.

Regards

Richard