EMISSIONS

Author
Discussion

stevieturbo

17,534 posts

254 months

Thursday 23rd November 2023
quotequote all
So you expected it to fail ?

Why not get the car looked at and repaired before the MOT ? Seems a foolhardy approach to run the car with known problems and faults and not maintain it ?

And what does the 18,000 miles refer to ? Was this part replaced 18k ago ?

Severe lack of useful information here.

Decky_Q

1,660 posts

184 months

Thursday 23rd November 2023
quotequote all
What are your engine/gearbox mounts like? If they're perished then the resulting movement could wear out the flexi in no time at all.

Worth checking.

GreenV8S

30,482 posts

291 months

Thursday 23rd November 2023
quotequote all
Why did the flex coupling fail? This might indicate you're getting too much engine movement.

tux850

1,863 posts

96 months

Friday 24th November 2023
quotequote all
dynamic pack said:
hi folks.
i recently brought the car in for the annual mot. it failed as expected . brought it to garage for the once over prior to repair . the "mechanic" said the emissions was probably due to a leak in the exhaust . i was expecting the rear silencer or the middle one to be in need of replacing . when doing nesessary repairs he replaced the joiner between the exhaust flexible pipe and the centre muffler . i was confident this would not solve the problem and was proved right at the retest.
Failures in the flexi pipe are quite common, so howcome you were confident it wouldn't fix the issue? Or did you/he know it was fine and he didn't replace the flexi but rather the coupling downstream of it? Either way, is there a question related to this aspect of the history?

dynamic pack said:
i brought the car to another garden and asked them to thoroughly check the exhaust system . they found a 2 inch crack in the frofnt flexible pipe at the hanger behind the subframe. i would have expected to get more than 18000 miles before this would this would happen . unfortunately this has led to a short life for the catalytic converter . what's your take.
Is it the short life you are wondering about, or do you suspect the original mechanic broke it whilst doing his repairs further (albeit not much further) downstream? A photo might help indicate the nature, and thereby cause, of the failure.

What is the relevance to the cat? Even if a combined downpipe/cat/flexi you can normally replace (by cutting out and rewelding/reclamping) a replacement flexi section without the expense of replacing the cat too.

tux850

1,863 posts

96 months

Friday 24th November 2023
quotequote all
Difficult to comment further without more info. Photos can often help.

richhead

1,658 posts

18 months

Saturday 25th November 2023
quotequote all
To sum up, car failed MOT, or close, someone else fault because I haven't maintained it properly

dynamic pack

Original Poster:

8 posts

12 months

Saturday 25th November 2023
quotequote all
richhead said:
To sum up, car failed MOT, or close, someone else fault because I haven't maintained it properly
go back to sleep . you obviously need it .

dynamic pack

Original Poster:

8 posts

12 months

Saturday 25th November 2023
quotequote all
tux850 said:
Difficult to comment further without more info. Photos can often help.
to be honest tux, i'm starting to think it was the result of vandelism during fitment or afterwards .

richhead

1,658 posts

18 months

Monday 27th November 2023
quotequote all
dynamic pack said:
richhead said:
To sum up, car failed MOT, or close, someone else fault because I haven't maintained it properly
go back to sleep . you obviously need it .
my sleep is fine thank you

stevieturbo

17,534 posts

254 months

Monday 27th November 2023
quotequote all
So a drip feed of "facts."

Multiple parts replaced over time, likely cheap poor quality replacements, not all at the same time. Parts will fail at different times, perhaps mounting issues leading to them having issues sooner etc etc etc


Replace the exhaust in its entirety with new OEM parts, including all hangers etc, and perhaps engine mounts. And then you can be fairly sure it will last a very long time.

But when doing things piece by piece, like drip feeding information, it will never go so well.

If you think vandals were the problem, don't take the car to vandals.