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Re: catalytic converter
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Posted by Justin VanAbrahams [Email] (#32) [Profile/Gallery] (more from Justin VanAbrahams) on Thu, 15 Mar 2007 17:13:18 Share Post by Email
In Reply to: catalytic converter, KS, Thu, 15 Mar 2007 10:11:46
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There is no quantifiable upper limit on how long a catalytic converter will function correctly under ideal combustion conditions. Converter life can be drastically shortened if an engine is run with leaded fuel or contaminated by oil from a badly worn engine. Misfiring or over-rich mixtures can also lead to shortened catalytic converter life, as the high temperatures of the converter will tend to ignite unburned fuel in the exhaust stream. If these combustion temperatures exceed 2550 degrees F the ceramic core of the converter will melt.

My 1985 Volvo 745T was sold in 2004 with its original cat, and still passed California smog easily. My 1988 9000T had it's 3" cat replaced 200 miles after it was installed when a cooling system leak developed at 95mph, hosing down the distributor and killing the ignition system instantly. The fuel already in the cylinders got dumped straight into the cat where it ignited and blew the entire substrate out the tailpipe. That was quite a light show...

In short: 10 years is a reasonable lifespan for a catalytic converter, and I wouldn't consider it an inherent warning sign.

posted by 207.15.18...
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