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Lummox



Member Since: 22 Apr 2022
Location: Doubtless Bay
Posts: 10

New Zealand 2006 Range Rover Supercharged 4.2 SC V8 Java Black
Hitachi compressor exhaust valve silencer missing

L322 4.2 S/C MY2006 102,000km.

Out of curiosity I had a look at the compressor in the spare wheel well and discovered that the sintered brass silencer was missing from the exhaust valve. I have read through a few threads here that explain how they become clogged and can cause problems with lowering the vehicle, and see that they can be replaced cheaply, or cleaned, or modified by drilling a hole.

My suspension seems to be running perfectly OK. The compressor looks shiny and brand new (though the air lines show manufacture dates of 2006). So I guess the cover keeps it well protected and clean.

Is it something I should replace? Does its absence create any problems? Should the dessicant in the drying chamber be replaced? (I read that the dessicant breaks down to dust and that can block the silencer).

Or is it something that I just ignore?

Post #646921 30th Oct 2022 10:53pm
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dingg1



Member Since: 29 Jun 2013
Location: PORTUGAL
Posts: 1338

2007 Range Rover Vogue SE 4.2 SC V8 Stornoway Grey

If people drill a hole in it to help vent pressure they may as well just remove it as Censored all gets filtered if its got a gaping hole in the filter. Whistle

Post #646925 31st Oct 2022 8:28am
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AJGalaxy2012



Member Since: 11 Jun 2018
Location: Gainsborough
Posts: 1464

United Kingdom 2012 Range Rover Vogue SE 4.4 V8 Bonatti Grey

Always made me wonder, why you wanted a filter on the exhaust? BMW i3 Electric Car
2012 Full Fat RR 4.4 TDV8 (now gone)
2006 VW Touareg 3.0 TDi V6

Post #646931 31st Oct 2022 9:35am
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8151

England 2014 Range Rover Autobiography SDV8 Loire Blue

I think it's just there to break up and silence the escaping air, it's quieter to have the air broken up by the sintered brass than just an open pipe, drilling a hole just helps it to exhaust quicker and still keeps some form of silencer...... Thumbs Up

I'd replace it but that's just me.... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #646932 31st Oct 2022 9:47am
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dingg1



Member Since: 29 Jun 2013
Location: PORTUGAL
Posts: 1338

2007 Range Rover Vogue SE 4.2 SC V8 Stornoway Grey

I think its also the inlet as well as the exhaust, might be wrong though Question

Post #646940 31st Oct 2022 11:25am
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Haylands



Member Since: 04 Mar 2014
Location: East Yorkshire
Posts: 8151

England 2014 Range Rover Autobiography SDV8 Loire Blue

Years since I looked at one, ignore my post then... does seem a bit pointless drilling a hole in a filter though...!! Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Post #646950 31st Oct 2022 12:54pm
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mjdronfield



Member Since: 04 Nov 2011
Location: Derbyshire
Posts: 7774

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

I agree Pete… and I’m one of those that drilled a hole in theirs. The car was stuck up in extended mode and only supposed to go 30mph. Garage quoted £700 to fit a new compressor. Think you can get the silencer bit for less than £40. The only time you can really hear the compressor running is if the seats are folded and the carpets up.

I did try cleaning the old silencer in brake cleaner, but it had no effect….

Thumbs Up 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Post #646952 31st Oct 2022 1:13pm
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mjdronfield



Member Since: 04 Nov 2011
Location: Derbyshire
Posts: 7774

United Kingdom 2011 Range Rover Vogue SE TDV8 Buckingham Blue

https://www.ebay.co.uk/itm/144480676130?ha...R_Lvt-OFYQ 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Post #646953 31st Oct 2022 1:25pm
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AJGalaxy2012



Member Since: 11 Jun 2018
Location: Gainsborough
Posts: 1464

United Kingdom 2012 Range Rover Vogue SE 4.4 V8 Bonatti Grey

mjdronfield wrote:
I agree Pete… and I’m one of those that drilled a hole in theirs. The car was stuck up in extended mode and only supposed to go 30mph. Garage quoted £700 to fit a new compressor. Think you can get the silencer bit for less than £40. The only time you can really hear the compressor running is if the seats are folded and the carpets up.

I did try cleaning the old silencer in brake cleaner, but it had no effect….

Thumbs Up

I fitted a FESTO silencer on mine, worked perfectly OK, £3.50 BMW i3 Electric Car
2012 Full Fat RR 4.4 TDV8 (now gone)
2006 VW Touareg 3.0 TDi V6

Post #646995 31st Oct 2022 6:26pm
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Lummox



Member Since: 22 Apr 2022
Location: Doubtless Bay
Posts: 10

New Zealand 2006 Range Rover Supercharged 4.2 SC V8 Java Black

It looks like you can get the silencers pretty cheaply from Ali Express - if you know what thread size to order :

https://www.aliexpress.com/item/4000112203...XtCYUqdDJf

And if you want to do seal and dessicant upgrade, these people seem to know what they are talking about. Scroll past the product info for more details about diagnostic codes and likely causes.

https://4x4airseals.com/product/hitachi-ai...repair-kit

Since no one has mentioned any downside to the silencer being missing I think I will just leave mine alone. I dont have a back box on the exhaust, and I have a platform built in the back for the dog, so I can hardly hear the compressor or the exhaust valve.





Cheers.

Post #647028 1st Nov 2022 1:46am
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