E51 The E51 Catalytic Converter Problem

[Lize]

Without wishing to diminish this cats thread, I have a car with a factory fitted bi-modal exhaust, it has twin pipes out of the rear box and flap on one exit pipe which is controlled by solenoid/ECU. You can switch on and off and its automatic dependent on engine revs so its quieter when cruising.

 

[E51ZRider]

Without wishing to diminish this cats thread, I have a car with a factory fitted bi-modal exhaust, it has twin pipes out of the rear box and flap on one exit pipe which is controlled by solenoid/ECU. You can switch on and off and its automatic dependent on engine revs so its quieter when cruising.

that's the sort of thing I want, hooning it I get noise lol...

New thread for separation from Cat issues....

https://forum.elgrandoc.uk/threads/bi-modal-exhaust.10974/

 

[marynamo]

Hubby decorred the rears today. Was a very quick and straight forward job. And best no extra noise.

 

[Lpgc]

@Lpgc I’ve seen inside a engine that had cat probs , to be honest engine was totally goosed , be cheaper and easier to get replacement

Yeh I'm expecting that mate, thanks for the info though.

 

[Kiwirose]

Having removed secondary Cats and had them replaced with resonators, was this a dumb idea? Have I got rid of one problem and perhaps created a similar one?

 

[Lpgc]

Having removed secondary Cats and had them replaced with resonators, was this a dumb idea? Have I got rid of one problem and perhaps created a similar one?

Doubt it, there's not usually much in resonators, they're often like a straight pipe inside. But for what they might achieve in terms of exhaust note (hardly any difference to straight pipe) with even a slight increase in risk I wouldn't have opted for them if they were free, would just decore the rear cats.

 

[Kiwirose]

Doubt it, there's not usually much in resonators, they're often like a straight pipe inside. But for what they might achieve in terms of exhaust note (hardly any difference to straight pipe) with even a slight increase in risk I wouldn't have opted for them if they were free, would just decore the rear cats.

Thanks Lpgc. I guess I wasted money and should have opted for the straight pipes. The exhaust specialist didn’t seem to want to decore.

 

[Toshi]

Hi, whilst I was looking around to buy Elgrand, I found an issue with the car that I found. As I search Nissan's website, I found there had been a major recall for Elgrand, which basically is the problem with engine control program and worst case it could clog catalytic converter resulting it stops the engine.

It affected total 121865 Elgrands manufactured between 10/04/2002-02/112006 so you could check Nissan's website - but they're in Japanese so here's the basic information of this recall;

Name__________________VIN to have been recalled_______Number of cars affected
UA-E51/CBA-E51______VIN E51-000037 - E51-156623__74,443
UA-NE51/CBA-NE51__NE51-000040 - NE51-154531___47,422
Production period____10/04/2002 - 02/11/2006________Total affected: 121,865

The car I found was within this range and I've confirmed that it wasn't repaired for this recall. You can check if your car was in this scope and if it was repaired from this page. VX report can show you what recalls have been raised but not showing if the car was repaired or not. In order for you to check if the car was repaired, you'd need to go to Nissan's website to check.


@Karl If I'm talking about something else from your first post, could you please make this information as a separate thread as above information would be useful for who ever has a concern for this recall? Thank you!

 

[Chris T]

The recall for the cats never fixed the problem anyway, so I'm not sure the fact it hasn't been done is an issue

 

[Karl]

@Toshi, as @Chris T mentioned above, the recall did not resolve the issue with the cats.

There have been E51's that were NOT part of the recall that suffered the Cat Blockage issue, and also E51's that had the work undertaken, still suffered the same problems.

It is a universal problem with the Quad Cat set up exhaust, across any make/model of vehicle. Over time a Cat will start to break down, and it will start to fall apart. Those pieces need to go somewhere, and the only direction is out the back. If there is something in the exhaust to prevent the bits from clearing the exhaust, then blockage will occur.

There has been another argument raised recently that the cat problem is caused by using poor quality fuel, but there is no weight to it at the moment, and we don't have enough evidence to suggest that this is true. So the only advice we can offer is to either remove the secondary cats, or get the whole exhaust system from manifold back replaced with a new one and some high flow cats that do the job of controlling emissions and cold starting.

 

[Guy England]

It’s the rear cats that are recommended to be removed, because any debris from failing front cats can block the rear cats, causing terminal engine failure.

I offer a de-catting service on an exchange basis, based in Hampshire UK. If you are too far away, I now offer a mail order option, de-catting and refurbishing and VHT protecting your own rear cats.

Here they are, before and after...
View attachment 8911

Hi I am in Eastbourne just wonder how much you charge to de catting old Guy

 

[LeStempy]

Following on from my recent experience of finding that mine had been decatted in Japan it might be worth checking before paying someone to do the job. Whilst the garage folk on here would be honest, there may be some more unscrupulous garages out there that would charge for work that had already been done.

 

[Winchester]

Hi I am in Eastbourne just wonder how much you charge to de catting old Guy

While you wait service, exchange factory de-catted, refurbished and VHT protected sections, £150. Takes about an hour.

 

[Toshi]

@Karl So sorry that I post same information that Dave posted on page 3. I didn't go through entire posts but now went through. So looks like I would need to get Nissan work on the recall, as well as probably decore or de-cat or the other way round in sequence.

 

[Karl]

It's okay mate, there are so many posts on the cost issue I never know what is where or by who

 

[E51ZRider]

@Karl So sorry that I post same information that Dave posted on page 3. I didn't go through entire posts but now went through. So looks like I would need to get Nissan work on the recall, as well as probably decore or de-cat or the other way round in sequence.

Recall doesn't make any difference as far as I can tell

get decatted and move on I say.

 

[Shelaz]

To anyone inthe know or those who have had near misses as a result of the front Cats collapsing could you please give me a rough idea of costs for decoring or indeed the best way to approach the matter and associated costs. This is perhaps a subject of a new thread but There isn't much detailed info associated with front cats failure or indeed remedying the issue, Be it an emergency, short term or long term solution. Any pointers would be appreciated.

The struggle is real.

 

[Hoobajoob]

To anyone inthe know or those who have had near misses as a result of the front Cats collapsing could you please give me a rough idea of costs for decoring or indeed the best way to approach the matter. This is perhaps a subject of a new thread but There isn't much info associated with front cats failure or indeed remedying them. Any pointers would be appreciated.

The struggle is real.

It cost me £75 to have my rear cats decored. I'm sure someone from your area will know a good place to take it.

 

[Phil]

To anyone inthe know or those who have had near misses as a result of the front Cats collapsing could you please give me a rough idea of costs for decoring or indeed the best way to approach the matter and associated costs. This is perhaps a subject of a new thread but There isn't much detailed info associated with front cats failure or indeed remedying the issue, Be it an emergency, short term or long term solution. Any pointers would be appreciated.

The struggle is real.

Most people leave the front cats as they are & decore or remove the rear cats. That way if/when the front cats break down the crap is able to escape out the back.

 

[Shelaz]

It cost me £75 to have my rear cats decored. I'm sure someone from your area will know a good place to take it.

After re-reading my post, I didnt actually ask the question I wanted to ask. Basically looking for costs and solutions related to decoring or replacing front cats.