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Exhaust Issue on 63 C


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Found an interesting problem during an annual on a 63C.  When I removed the Exhaust I found a crack in the exhaust heat exchanger.  It seems it was blowing exhaust on the front of the carburetor.  It was like having the carb heat on all of the time.  Low power and running rich.  Fuel burn was considerably higher than normal.  I think it occurred because the rubber rear support on the firewall had failed in the past and all of the weight of the pipe was on the heat exchanger weld.  The support had been repaired but the crack was not found until the exhaust was removed for the annual.  

Mark

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Mark,

looks like the weld got stressed and broke…


Did you get high CO readings with that?

Having the exhaust dump in front of the carb has a tendency to have CO enter the cabin in measurable amounts…

Heating the carb… that is a whole new meaning for carb heat…

Did you have a FF meter indicating higher fuel flow?

Or was the FF actually higher than normal?

:)

Best regards,

-a-

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