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post #1 of 6 (permalink) Old Feb 16th, 2019, 11:27 AM Thread Starter
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No cat wtf

On with changing the cat on the mini one after getting permanent cat below threshold code.

Well the old cat is off and wanted to get an idea of the condition of the innards

Shone the torch town there and nothing. so at some stage the cat has been gutted and welded back up.

Question is how has the car passed an mot last Sept. The mot was done after the valve stem seals were changed whilst the head was in situ.

Maybe the seals wernt changed and the cat gutted to pass emissions

What do you think

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post #2 of 6 (permalink) Old Feb 16th, 2019, 05:37 PM
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On with changing the cat on the mini one after getting permanent cat below threshold code.

Well the old cat is off and wanted to get an idea of the condition of the innards

Shone the torch town there and nothing. so at some stage the cat has been gutted and welded back up.

Question is how has the car passed an mot last Sept. The mot was done after the valve stem seals were changed whilst the head was in situ.

Maybe the seals wernt changed and the cat gutted to pass emissions

What do you think
burnt away maybe if no weld marks on cat. ho bugger one of the first things on the list just goes to prove cant take nothing for granted,, i bought a 2.2hdi powered 4x4 the other day for family hack, guy was really nice RAF pilot not short of a few quid.. service history looked all good serviced 7k ago and its on 70k so due a timing belt and water pump anyway.. when i started the service found air filter covered in black soot and grass etc ie been in there for over 30k without doubt, the oil was loaded with carbon,, ad when looked in at timing belt, it had just had the top oil cam seals replaced nothing else and all the belt and front covers were lagged in dirty oil from and the belt,, ie they had gone to trouble of removing the belt enough to change the seal behind it then stuck it back together and sold it on... cant trust no one when buying a car, cant take nothing for granted, expect the worst anything else is a bonus, in your case seeing is believing ie looking inside the cat when have codes related to low cat codes.


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post #3 of 6 (permalink) Old Feb 16th, 2019, 09:40 PM Thread Starter
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No weld marks on cat. Could the cat have self destructed with all the rich fuel and oil and heat and spat it out of the exhaust tail pipe

Would a vehicles engine loose back pressure in this situation and therefore oil pressure drops

Last edited by Cbatoday; Feb 17th, 2019 at 06:54 AM.
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post #4 of 6 (permalink) Old Feb 17th, 2019, 06:58 AM
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No weld marks on cat. Could the cat have self destructed with all the rich fuel and oil and heat and spat it out of the exhaust tail pipe

Would a vehicles engine loose back pressure in this situation and therefore oil pressure drops
more like the other way around the engine feeds the cat oil and rich fuel mixture and melts away the cat over time, oil pressure maybe effected from low oil levels at some points of its life and worn the crankshaft

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post #5 of 6 (permalink) Old Feb 17th, 2019, 11:55 AM
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I think it’s more likely the cat
failed and got restricted and
someone busted the cat out
as a quick fix for that.

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post #6 of 6 (permalink) Old Feb 17th, 2019, 01:03 PM
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I think itís more likely the cat
failed and got restricted and
someone busted the cat out
as a quick fix for that.
its not that easy the top of cat has the 4 branch manifold welded to it, and the bottom end has a narrow 90 degrees bend in it,, i know from past dpf filter knocking through that without a good straight access to the filter part it impossible to knock them out..

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