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  #46  
Old 06-26-2013, 11:48 AM
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Join Date: Jul 2004
Location: Barrington, RI
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Replaced cat this morning (and a leaking resonator pipe with a straight pipe while I was at it). Car runs great....it can finally BREATHE! You should have seen all the carbon in the exhaust system!!!

One question that arose from my conversation with the exhaust guy....according to him and the folks at Magnaflow, cats only fail if there's some other problem with the car, some problem upstream that causes the cat to fail. So it made me wonder about EGR deletion. Could that added exhaust cause the premature failure of a cat?

EDIT: I talked to Magnaflow tech support....they didn't seem to think that EGR deletion would have any adverse effect.
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06 E320 CDI "Benson", Platinum Blue, 173k mi
06 E320 CDI "Rutherford", Black, 143k mi
91 300D "Otis", Smoke Silver, 128k mi
98 E300 "Murray", Silver, 127k mi, Stage 2 Rocketchip chip tuned, under son's care

Twelve other MB's owned and sold
2002 Honda Odyssey 240k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife

Last edited by shertex; 06-26-2013 at 01:19 PM.
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  #47  
Old 06-26-2013, 01:07 PM
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Join Date: Jul 2004
Location: Barrington, RI
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Quote:
Originally Posted by Jooseppi Luna View Post
So you are going with a cat, then? Is this because you have to pass emissions?
Just thought I might as well do it right....my green good deed for the day.
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06 E320 CDI "Benson", Platinum Blue, 173k mi
06 E320 CDI "Rutherford", Black, 143k mi
91 300D "Otis", Smoke Silver, 128k mi
98 E300 "Murray", Silver, 127k mi, Stage 2 Rocketchip chip tuned, under son's care

Twelve other MB's owned and sold
2002 Honda Odyssey 240k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #48  
Old 06-26-2013, 01:19 PM
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Join Date: Nov 2010
Location: TX
Posts: 3,387
Quote:
Originally Posted by shertex View Post
Replaced cat this morning (and a leaking resonator pipe with a straight pipe while I was at it). Car runs great....it can finally BREATHE! You should have seen all the carbon in the exhaust system!!!

One question that arose from my conversation with the exhaust guy....according to him and the folks at Magnaflow, cats only fail if there's some other problem with the car, some problem upstream that causes the cat to fail. So it made me wonder about EGR deletion. Could that added exhaust cause the premature failure of a cat?
The inherent design problem of the exhaust is that the cat (oxi catalizer) is placed way back and takes forever to heat up, Now consider that any NA diesel engine runs cold unless you are lugging it. Add to this soup a nice dollop of EGR and some low rpm cruising - you get the idea.

The OM606 is built to rev, 4 valve head, oversquare block, let her sing. keeps it very nicely tuned.
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1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)
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  #49  
Old 06-26-2013, 01:37 PM
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Join Date: Jul 2004
Location: Barrington, RI
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Quote:
Originally Posted by Zulfiqar View Post
The inherent design problem of the exhaust is that the cat (oxi catalizer) is placed way back and takes forever to heat up, Now consider that any NA diesel engine runs cold unless you are lugging it. Add to this soup a nice dollop of EGR and some low rpm cruising - you get the idea.

The OM606 is built to rev, 4 valve head, oversquare block, let her sing. keeps it very nicely tuned.
Excellent....I will drive it like I stole it.
__________________
06 E320 CDI "Benson", Platinum Blue, 173k mi
06 E320 CDI "Rutherford", Black, 143k mi
91 300D "Otis", Smoke Silver, 128k mi
98 E300 "Murray", Silver, 127k mi, Stage 2 Rocketchip chip tuned, under son's care

Twelve other MB's owned and sold
2002 Honda Odyssey 240k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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