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Simple fix for clogged catalytic converter

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Simple fix for clogged catalytic converter

Postby Nuttydriver » 03 Nov 2011, 02:40

Hey everyone, for those of you that don't have the fancy emissions test I've found a way to hollow out a bad cat and not throw a check engine light. All you need is a spark plug non fouler, available at auto zone for a couple bucks and a tap to make new threads. Install the non fouler into the hole for the o2 sensor and reinstall the sensor after hollowing the cat. This allows the sensor to receive the proper heat readings but keeps it out of the now richer exhaust. I've done this to 3 different vehicles now with no problems. Sure beats buying a new cat.
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81 chevy chevette
89 chevy k1500
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Re: Simple fix for clogged catilitic converter!!

Postby JimBee » 03 Nov 2011, 03:15

I don't get the hollowing part. How would you get inside the cat?
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Re: Simple fix for clogged catilitic converter!!

Postby Nuttydriver » 03 Nov 2011, 03:24

Not sure haven't done it to my Volvo but if it's a straight shot a bar and hammer works well to break up what's inside it then you simply dump it out and hook the exhaust back up. Sometimes up have to cut the cat off and weld it back on as well.
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99 dodge Dakota
81 chevy chevette
89 chevy k1500
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Re: Simple fix for clogged catilitic converter!!

Postby scotts911e » 12 Nov 2011, 09:16

Ok let me get this straight you say to install the non fouler where the o2 sensor goes and re-install the o2 after cleaning out the cat but you didn't say where to to re-install it considering the spark plug is in it's place now?
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Re: Simple fix for clogged catilitic converter!!

Postby Nuttydriver » 12 Nov 2011, 15:29

A spark plug non fouler is simply a small threaded spacer.
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99 dodge Dakota
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89 chevy k1500
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Re: Simple fix for clogged catalytic converter!!

Postby shiloh51933 » 12 Nov 2011, 15:58

Has anybody tried this on there Volvo yet? My Cat is good but I'd like to know if this works good on my 850 for future reference.
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Re: Simple fix for clogged catalytic converter!!

Postby tjts1 » 12 Nov 2011, 16:26

Destroying or removing a catalytic converter is illegal under federal and most state's laws even if your local jurisdiction doesn't require an annual or bi annual emissions test. The federal penalties include fines up to $2500 for the vehicle owner and up to $25,000 fine for the person that damaged or removed the catalytic converter.
http://www.epa.gov/air/caa/title2.html
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Re: Simple fix for clogged catalytic converter!!

Postby shiloh51933 » 13 Nov 2011, 02:08

tjts1 wrote:Destroying or removing a catalytic converter is illegal under federal and most state's laws even if your local jurisdiction doesn't require an annual or bi annual emissions test. The federal penalties include fines up to $2500 for the vehicle owner and up to $25,000 fine for the person that damaged or removed the catalytic converter.
http://www.epa.gov/air/caa/title2.html



Don't really understand why this was posted??? Who was talking about "Destroying or removing the catalytic converter"???? This person started this thread to demonstrate how to clean out there exhaust, atleast that was what I got from this thread. This was a method of cleaning your cat not removing or destroying.
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Re: Simple fix for clogged catalytic converter!!

Postby tjts1 » 13 Nov 2011, 02:36

shiloh51933 wrote:
tjts1 wrote:Destroying or removing a catalytic converter is illegal under federal and most state's laws even if your local jurisdiction doesn't require an annual or bi annual emissions test. The federal penalties include fines up to $2500 for the vehicle owner and up to $25,000 fine for the person that damaged or removed the catalytic converter.
http://www.epa.gov/air/caa/title2.html



Don't really understand why this was posted??? Who was talking about "Destroying or removing the catalytic converter"???? This person started this thread to demonstrate how to clean out there exhaust, atleast that was what I got from this thread. This was a method of cleaning your cat not removing or destroying.

Re read the first post more carefully.
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