Cat Question... - Alfa Romeo Forum
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(Post Link) post #1 of 10 Old 09-07-11 Thread Starter
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Hmmm Cat Question...

Could someone help me out?

Is it true to say that the catalytic converter fitted to a 2.0l JTS should have ceramic honeycomb in both bank 1 and bank 2?
If both banks are supposed to contain the honeycomb but it is missing from bank 2 will it fail MOT?

Thanks in advance...

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You would bave a Cat on cyl 1 & 4 but none on cyl 2 & 3.
That can't be a great idea for many reasons even if it did scrape through an MOT...!
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(Post Link) post #3 of 10 Old 09-07-11 Thread Starter
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Was sort of thinking along these lines, second hand cat just purchased to replace my fitted version.
Have emailed supplier and will take it from there..
£180.00 for half a cat...

Last edited by martinhendo; 10-07-11 at 21:09.
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As long as the main cat is working it should pass the emmisions test with the other cats removed.

The small cats are there to reduce emmisions when the engine is first started, and as long as the main cat is hot at the MOT station you will be fine.
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(Post Link) post #5 of 10 Old 11-07-11 Thread Starter
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Thanks for the replies guy's..

Supplier has agreed to send a replacement for my purchase which is incomplete.
I managed to remove my heat shield and both pre cat lambda sensors from the fitted cat on my Alfa, took photos of both banks that contained ceramic honeycomb and forwarded them along with ones of the supplied Cat as a comparison.

Picture of damaged blowing Cat's...
[URL=""]
Missing Ceramic honeycomb...

Present Ceramic within damaged Cat...


Happy days, awaiting replacement and then the fun shall begin......

Last edited by martinhendo; 11-07-11 at 22:07.
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(Post Link) post #6 of 10 Old 13-07-11 Thread Starter
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Received a replacement from supplier and I am happy to say that it is a complete unit, just have to tidy it up with wire brush and some degreaser before a coat or 2 of VH temp paint and it'll be ready to fit along with a new front link pipe..

Thanks again for the replies

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Quote:
Originally Posted by symon View Post
As long as the main cat is working it should pass the emmisions test with the other cats removed.

The small cats are there to reduce emmisions when the engine is first started, and as long as the main cat is hot at the MOT station you will be fine.
The JTS only has the two cats in the manifolds and thats it, no others.
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(Post Link) post #8 of 10 Old 17-07-11 Thread Starter
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Thumbs Up

Yip as I thought, some still think it has 3 though.

Changed mine today (Sunday), don't I just love working on my Alfa.
Had to grind off all m8 bolt heads and captive nuts related to the middle section, and front link pipe to maniverter, no way they were ever going to release even after 3 days of plusgas treatment..
On a brighter note, all 8 nuts released from exhaust manifold studs without sheering off..
On refitting everything went to plan and thank god for copper slip, the compressor bracket slowed me down a little as did a flat battery..

Looks as if my next purchase shall be a new battery, it will have to wait until after MOT though..
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The JTS only has the two cats in the manifolds and thats it, no others.
I didn't know that... I thought it was the same as a TS CF3
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I didn't know that... I thought it was the same as a TS CF3
There is a box under the car in the same place as a TS CF3 and on ePer it is called "catalyser silenced" but it is just a resonator box, you can look straight through it from one end to the other unrestriced, and the replacement cost is only about £140 or so, not the £800-£1000 Alfa usually charge for a cat section.
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