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Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5556
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Re: Recall Catalytic Converter & O2 Sensor Breakage


quote:

wanderer69 wrote:
Whats a second cat???
If that is the small muffler looking thingy, half way along the tailpipe;
It copped a hit a couple of months ago; long before the Mystery Tour.



Hi John,
Yes a hit to the second cat under the Xtrail could well have fractured the internals as they are ceramic and may well have taken some time to start falling apart.
I personally think this might be a possibility and if it is indeed found to be the problem it will not be covered under any warranty due to the impact damage.

---
Kev X450(c) T30 Guru
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19/Mar/2010, 9:51 pm Link to this post Send Email PM   Send Private Message Blog
 
wanderer69 Profile
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X-TRAIL HOLIC
 


Date Registered: 09-2008
Location: Wyrallah. N.S.W.
TOTAL POSTS: 1183
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Re: Recall Catalytic Converter & O2 Sensor Breakage


Thanks Guy's.
That second cat in Jalals foto, is the thingy which has been dented.
I dont think they would cover it under warranty either.
Rang Autobarn yesterday, they cant get one for me, but suggested I ring an exhaust place, to get a price on a high flow cat, to replace it.
Can anyone tell me what this second cat does??
Does it have to have this ceramic gunk in it, or can it be replaced with something else??
Apart from the rattle, can it cause any damage, as the rattle is not there all the time?
Thanks all. emoticon

Last edited by wanderer69, 21/Mar/2010, 7:42 am


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John & Melinda. X970 (c)

2007 STS Exy, Diamond White.
Bonnet Protect. Member No's, Forum & URL Stickers. T/Bar. Side steps.
S/Line W/shields, S/roof Deflector (Lost); Brake Decal.
21/Mar/2010, 7:30 am Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29092
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Re: Recall Catalytic Converter & O2 Sensor Breakage


Hi John,

That must have been quite a hit to cause the ceramic core to break. I hammered the damn thing when I took my extractors off and nothing happened to it.

The second cat. is there to comply with the new emission standards EURO4 and helps reduce the carbon emission from your exhaust system, so legally you must have it there otherwise you won't pass rego.

Having said that, that second cat. is the cause of your xtrail having less power than then previous models (9KW less to be exact)

I can't see a problem with replacing it with a high flow cat that has a stainless steel core and there are many of them around, but I would highly recommend the Catco brand (made in the US) and while it could be a bit expensive, it is the best high flow cat in the market. You can find it in many muffler shops who use it with their exhaust systems. (details of the Catco. cat. that is suitable for the exy can be found HERE.

Whatever Cat. you decide to get, you must ensure it is EPA compliant.

quote:


Apart from the rattle, can it cause any damage, as the rattle is not there all the time?



Yes, it can cause serious damage as the flakes from a damaged ceramic core can get sucked in back into the engine and cause pitting to the cylinder walls. There has been cases of the engine needing full replacement due to damage caused by disintegrating cats that have flaked, so it is pretty serious.

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21/Mar/2010, 8:48 am Link to this post Send Private Message MSN Blog
 
wanderer69 Profile
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Date Registered: 09-2008
Location: Wyrallah. N.S.W.
TOTAL POSTS: 1183
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Re: Recall Catalytic Converter & O2 Sensor Breakage


Just found this bit of info about the catalytic converters.
Hope the link works, & is helpful to members.
Gave me some help.

http://www.youtube.com/watch?v=rmtFp-SV0tY

---
John & Melinda. X970 (c)

2007 STS Exy, Diamond White.
Bonnet Protect. Member No's, Forum & URL Stickers. T/Bar. Side steps.
S/Line W/shields, S/roof Deflector (Lost); Brake Decal.
21/Mar/2010, 10:17 am Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29092
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Re: Recall Catalytic Converter & O2 Sensor Breakage


Good video John. If you click on one of the related videos in that page you might hear a very familiar rattle emoticon

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21/Mar/2010, 12:05 pm Link to this post Send Private Message MSN Blog
 
cooch t31 Profile
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Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re: Recall Catalytic Converter & O2 Sensor Breakage


Just watched the video and it was very informative, thanks John.

---
Tony X-891c

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HERE is my old 2008 T31, ST Series1

22/Mar/2010, 5:37 am Link to this post Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29092
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Re: Recall Catalytic Converter & O2 Sensor Breakage


Hi John,

The other good brand of the high flow stainless steel core cat. converters which I forgot to mention is Magnaflow, also made is the US and its performance is very close to the Catco one. They're also EPA approved.

The Magnaflow high flow cat can be bought for around $175.00 for the 3" size.

---

22/Mar/2010, 8:07 am Link to this post Send Private Message MSN Blog
 
wanderer69 Profile
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Date Registered: 09-2008
Location: Wyrallah. N.S.W.
TOTAL POSTS: 1183
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Re: Recall Catalytic Converter & O2 Sensor Breakage


Hi Jalal.
Is the 3" cat the one needed to fit our June 07 Exy???

---
John & Melinda. X970 (c)

2007 STS Exy, Diamond White.
Bonnet Protect. Member No's, Forum & URL Stickers. T/Bar. Side steps.
S/Line W/shields, S/roof Deflector (Lost); Brake Decal.
24/Mar/2010, 7:07 am Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29092
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Re: Recall Catalytic Converter & O2 Sensor Breakage


That's what I have under my exy. The muffler shop will weld step-down pipes to suit your factory exhaust pipe size.

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24/Mar/2010, 8:17 am Link to this post Send Private Message MSN Blog
 
omdafyd Profile
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X-TRAIL NEWBIE
 


Date Registered: 04-2010
Location: Back in Ozzy ...
TOTAL POSTS: 64
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Re: Recall Catalytic Converter & O2 Sensor Breakage



Quote by Jalal ..."I have always maintained the fact that changing the factory ceramic cat. converter is a MUST for anyone wishing to keep their exy for a long time. It is the safest bet and with Hi-Tech offerring 10 years warranty, it is the most logical one too!"

At what number of Ks would you consider doing this, the Exy I will have soon have, and intend to keep, has 48,000 on the clock and a new 3Yr extended Nissan Warranty?
7/Jun/2010, 11:05 pm Link to this post Send Email PM   Send Private Message
 


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