2000 V70 XC crack in cat

Post by **kahl** » 24 Mar 2016, 13:57

While under the car with it running I heard the ringing of a exhaust leak coming from the cat. I cut the protective shield shield so I could pull it out of the way. There was a crack/hole in the center where the rivet is seated. Ground off rust and welded in a sheet of stock to seal off the leak. Beats buying a new cat. It is so nice to have a neighbor with a lift and welder.

Post by **kahl** » 24 Mar 2016, 14:14

Here is the patch finished before the shield was put back.

57gretsch · Post by **57gretsch** » 24 Mar 2016, 15:52

Just did the same thing on Monday. Also welded up the joint closest to the manifold. I was told that I needed a new cat when I took the car in for a safety. After pricing them out I decided to have a look myself. Won't be going back to that station anytime soon for opinions or work.

Post by **scot850** » 24 Mar 2016, 17:29

Nice job guys!

Neil.

Post by **abscate** » 24 Mar 2016, 18:47

Nice 1000 USD save. Relieved to find this wasn't about drug smuggling in pets, too.

Post by **benpineapple** » 25 Mar 2016, 12:27

How long do you expect the weld patch to last? I've got a mildly leaking muffler (crack near pipe attachment), which I'm considering just replacing. Mostly, I don't want to have to patch it every 3-4 months, which is about how long weld patches would last on my 1990 240's exhaust system before I replaced the whole thing.

Great pics, thanks.

Post by **JDS60R** » 25 Mar 2016, 12:48

When I lived in MA we would get 2 years from a steel patch and an almost permanent fix from stainless. I know Volvo used 400 series stainless for some of the cats but that rust shouldn't be that bad on 400.

If you need a cat you can run a magnaflow 51356 if it needs a center bung or a 51206 if you don't. If its a 98 or similar you can run a 99065HM Either way you will need a 45 degree bend to remake the turn between the flex joint and the new cat. (Many volvo cats are 20 inches long while most aftermarket cats are 11 to 15 in long).

Part numbers above are for federal emissions . If you need CA or NY call Magnaflow and they will tell you equivalent.

Some require a bung in the 45 degree section (98 and similar) so pick up a bung while shopping. I tig in with 309L rod . expect to pay $30 for the 45 bend, $100 for a magnaflow cat and $10 for a bung.

Magnaflow also has the entire downpipe but its $500 http://www.magnaflow.com/products?partNumber=24071

http://www.magnaflow.com/products?partNumber=99065HM
http://www.magnaflow.com/products?partN ... Term=51356
http://www.magnaflow.com/products?partN ... Term=51206

Sorry if this sounds like a Magnflow commercial. Its just the brand I use. They don't give me a problem with codes etc ,so I'll continue to use them.