I've got a leak somewhere in one of the flexipipes between the front and rear catalytic converters. There are no codes at the moment, just noise. Can flexipipe be replaced, repaired or patched, or should I replace the entire assembly?

On my car it is all solid plumbing under the car that I can recall. Procrastination, mankind's greatest labour saving device!

Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18

If the cats are in good condition, there will be no problem in replacing the pipe between them. Past: FL2 TD4 HSE Auto
Evoque SD4 Dynamic Lux Auto
Present: Audi A3 S Line.

Maybe its been repared before!!

There is no solid pipe all the way through. The rear catalytic converters have flexible connections that connect to the converters that are part of the exhaust manifold.



Last edited by flybd5 on 17th Jan 2020 5:08 pm. Edited 1 time in total

It's a i6 guys, maybe different from your diesels.
Will have a crawl under mine when it stops raining. Common sense isn't very common.
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2007 Land Rover Freelander2 I6 hse Auto

What he said.

Looks like they can't be replaced, the ends are welded to the pipes. So the question is whether they can be repaired. My gut feeling is that they cannot be. 2008 US LR2 SE, 6-cyl gas

At this point repair is definitely worth a try if it buys time and allows you to shop for a good deal on what you will have to replace. My Canadian 2 cents.........

Ok, but how do you repair a flexible pipe like that? I've never done one of those before. 2008 US LR2 SE, 6-cyl gas

Maybe you can find the right size section & get it welded in locally.

https://www.aliexpress.com/wholesale?catId...int+repair

Good luck with it.

Nick (Now Sold). 2008 Freelander 2 (Nazca Sand) SE TD4 Auto. Statutory write off & on WOVR for hail damage but still road legal.
171037Km as of 09/05/22
Superchips Bluefin Flash
Nanocom Evo II (also sold)

Hmm. That just might do the trick but I would likely have to remove it, and the cross member to do that. Exhaust hardware is notoriously prone to corrosion. 2008 US LR2 SE, 6-cyl gas

I found a place locally that will cut off the flexible pipes and weld new ones on. Going tomorrow to get an estimate. 2008 US LR2 SE, 6-cyl gas

The flexible pipes cannot be repaired or replaced. The entire rear catalytic converter set has to be replaced. It's too close to the engine up front to be cut and welded, and in the back the flange on the converter side has too much corrosion and is leaking. 2008 US LR2 SE, 6-cyl gas

If the flange is leaking that’s fine but if the stainless flexi section is leaking you need also to check your engine mounts and stab mounts, those flexi sections should easily outlast the life of the vehicle unless they are getting too much movement/stress from the engine rocking too much. Regards

David

Lovely i6 has now gone, but not me......

Please let me know if anything in my post offends you, as I may wish to offend you again......