 | Home > Technical > Removing a cat on a 2011 Defender 110 2.4 Puma |
 
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| AntonioSC Member Since: 10 Sep 2014 Location: Florianopolis, SC Posts: 6   
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Hi everyone.
I own a 110 and am bothered by the intermitent but persistent vibrations (metallic noises) that come out from the catalyser since I first purchased the car (brand new). Cannot count on a LR dealer as they refuse to acknowledge the problem (yes, the car is still under warranty). My mechanic says that, apart from a small increment in emissions, no other problem will result from removing the internal parts of the cat. However, someone else has suggested me remove the whole cat box and replace it by a 63 mm diameter pipe, a common procedure, according to him. How different can the outcome be if (i) the whole cat box is removed or (ii) just the internal parts of the cat (ceramics etc), ie, keeping the metallic outer? By "outcome", I mean reduction in performance, additional fuel consumption, change in noise, darker smoke etc. Lastly, why so many people, according to one of my sources, remove the whole cat box? Is it all related to annoying vibrations, just like in my case, or they aim at another target? Really appreciate your views on that. Antonio |
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10th Sep 2014 2:44pm |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2638  
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I removed the internals, no issues whatsoever.
Cheapest way to get rid of the cat  --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged 
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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10th Sep 2014 3:34pm |
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| AntonioSC Member Since: 10 Sep 2014 Location: Florianopolis, SC Posts: 6
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Many thanks, Naks.
What was the motivation for you to do that? Regards. |
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10th Sep 2014 5:36pm |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610  
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Do a search under 'decat' there is loads of threads listing all the benefits of decatting. Still one of the best and cheapest modifications you can do in my opinion.
If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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10th Sep 2014 6:02pm |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2638
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reduce EGTs, decrease cabin heat soak, etc.
turbo also spools up a little bit quicker at low revs. --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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10th Sep 2014 7:02pm |
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| AntonioSC Member Since: 10 Sep 2014 Location: Florianopolis, SC Posts: 6
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Hi guys:
Just to add that I'm simply trying to get rid of the irritating metal noise without having to buy a new and pricey cat. I want to keep the original characteristics of the car as much as possible: performance, noise level, smoke aspect etc as I'm not involved in any car tuning or the alike. Cheers |
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10th Sep 2014 7:42pm |
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| Landy-Novice Member Since: 22 Jun 2013 Location: wiltshire Posts: 118
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take it off, cut it open beat the internals out and weld and refit.
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12th Sep 2014 6:43pm |
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| AntonioSC Member Since: 10 Sep 2014 Location: Florianopolis, SC Posts: 6
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Thank you all.
Regards |
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16th Sep 2014 12:31am |
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| Fish Member Since: 21 Jan 2014 Location: United Kingdom Posts: 58 
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Just bash them out no need to cut. Also improves fuel efficiency..
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23rd Sep 2014 12:59pm |
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| AntonioSC Member Since: 10 Sep 2014 Location: Florianopolis, SC Posts: 6
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Hi Fish:
You mean bash the internals out? Regards, Antonio |
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24th Sep 2014 10:26pm |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2638
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Yep, my mechanic used a long drill bit and broke up the internals into small pieces, which then fall out of the other side of the cat -- 2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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25th Sep 2014 8:39am |
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| bear100 Member Since: 22 Mar 2010 Location: South Wales Posts: 1915  
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Bear in mind that it will an MOT failure to not have a cat, that said I will still remove mine
 I will replace the cat section at Mot time and again remove it just after!
You could easily just bash! the internals out but my luck is not the best and I will end up having a jobs worth mot tester 2016 Range Rover Autobiography 4.4 TDV8 2010 110 XS Utility 2.4TDCI 2010 Range Rover Sport TDV8 (gone) 2007 Discovery HSE TDV6 (gone) 1993 110 csw 200 tdi (gone) 1994 90 HT 300 tdi (gone) 1994 discovery 300tdi (gone) 90 hybrid 3.5 v8 (gone) Range rover bobtail 3.5 v8 (gone) |
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25th Sep 2014 10:21am |
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| K9F Member Since: 12 Nov 2009 Location: Bournemouth Posts: 9610
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Bear under current rules the tester would never know.....
Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated  If you go through life with your head in the sand....all people will see is an ar5e!!
Treat every day as if it is your last....one day you will be right!! |
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25th Sep 2014 10:28am |
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| dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586 
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but the reduced backpressure can shorten the turbo life. Ask to BAS..... Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition
IID Pro MV License |
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25th Sep 2014 5:43pm |
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