Re: Help identifying pinging/rattling
FWIW, I've seen brand new cars with broken baffles in the muffler. I'm not saying I'm right, it's just something to check. After seeing geezer#99's post, it occurs to me that you could use a mallet and tap the pipe and muffler to see if you can duplicate the rattling noise. I found a case where a car had the oil light flash when doing hard braking. Turned out that the oil pickup screen had fallen off the pump. I hit the pan with a rubber hammer, and could hear the screen plop back down onto the pan. That's one rare failure, right there!
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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