Catalytic converter pinging?
As exhaust systems expand and contract we will always hear little pops and pings in the exhaust train and the catalytic converter. My H2 at 3K miles has developed a very loud "ping" in the exhaust sytem when it is hot. The ping occurs at 15 second intervals. Audible within the vehicle at idle, it's like someone taking a hammer and rapping the metal housing. I have isolated it to the catalytic converter. Anyone having the same noise? It goes away in 5 to 10 minutes after I turn the engine off. It's an annoyance more than anything and gets the attention of folks at stop lights.
Regards,
DVJ
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