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-   -   DPF/KAT cracked at top of flex pipe. (https://sprinter-source.com/forum/showthread.php?t=67125)

rmcquet 06-28-2018 04:19 PM

DPF/KAT cracked at top of flex pipe.
 
Did a pre-purchase inspection for an '07 Sprinter with 130k miles. MB of Draper UT did the inspection. "DPF/KAT cracked at the top of the flex pipe." Quoted repair cost of $1,600. A non-MB mechanic said it could likely be welded instead, thus saving a lot of money. But some other posts I've read I think indicate how tricky it can be to get a tight seal with the weld.

Anyone have suggestions or thoughts?

(Also, presume I need to replace the particulate filter as well).

Thanks!

Bobnoxious 06-28-2018 04:34 PM

Re: DPF/KAT cracked at top of flex pipe.
 
I would replace flex pipe with OEM parts. Fix proper, fix it once. Why do you believe you need a DPF? However, I would negotiate price with the expectation it does. Most likely beyond its service life and improved in 11-years.

lindenengineering 06-28-2018 08:11 PM

Re: DPF/KAT cracked at top of flex pipe.
 
Quote:

Originally Posted by rmcquet (Post 667410)
Did a pre-purchase inspection for an '07 Sprinter with 130k miles. MB of Draper UT did the inspection. "DPF/KAT cracked at the top of the flex pipe." Quoted repair cost of $1,600. A non-MB mechanic said it could likely be welded instead, thus saving a lot of money. But some other posts I've read I think indicate how tricky it can be to get a tight seal with the weld.

Anyone have suggestions or thoughts?

(Also, presume I need to replace the particulate filter as well).

Thanks!

I fix this all the time.
You will need a 2,50 inch flex pipe by Walker cost about $100.
Buy one that has tube extensions at either end which you will trim to fit.
Remove the steady bracket , to allow easy stinger access and weld it in making sure you don't touch the flex bubble crimp section of the flex pipe .
Job done for about $250 at a zorst shop,
Dennis

Aqua Puttana 06-28-2018 08:57 PM

Re: DPF/KAT cracked at top of flex pipe.
 
Quote:

Originally Posted by lindenengineering (Post 667514)
I fix this all the time.
You will need a 2,50 inch flex pipe by Walker cost about $100.
...
Dennis

Flex... some give... what a novel idea. I'll bet your fix outlasts the sturdy new design super duper MB replacement parts.

:2cents: vic

lindenengineering 06-28-2018 09:03 PM

Re: DPF/KAT cracked at top of flex pipe.
 
Well Vic
It works and is a way of saving what is an expensive exhaust component repaired to live another day .:thumbup:
Cheers Dennis

Old Crows 06-28-2018 09:23 PM

Re: DPF/KAT cracked at top of flex pipe.
 
Dennis your shop motto shoud be: Semper Gumby (Always Flexible) .

Bobnoxious 06-28-2018 09:37 PM

Re: DPF/KAT cracked at top of flex pipe.
 
To deviate from OEM is utter Sprinter blasphemy! Don't you gents have any scruples? I would like to see pictures of these Mickey Moused flexiamajigs?

Cheyenne 06-28-2018 09:39 PM

Re: DPF/KAT cracked at top of flex pipe.
 
Quote:

Originally Posted by Bobnoxious (Post 667551)
I would like to see pictures of these Mickey Moused flexiamajigs?

http://www.walkerexhaust.com/product...universal-pipe

Bobnoxious 06-28-2018 09:43 PM

Re: DPF/KAT cracked at top of flex pipe.
 
Quote:

Originally Posted by Old Crows (Post 667540)
Dennis your shop motto sboud be: Semper Gumby (Always Flexible) .

:thinking:

Bobnoxious 06-28-2018 09:47 PM

Re: DPF/KAT cracked at top of flex pipe.
 
Quote:

Originally Posted by Cheyenne (Post 667553)

I am sorry, I should have said inspect the welds. Perfect and pretty weld beads are important to me. And the "won't see it" remarks don't cut it.


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