1941 V8 stock Backfiring question

[Veeder]

If I had a situation where I had some extreme backfiring take place what damage can be done to the engine?

Specifically can it damage a spark plug?

Bob

[JSeery]

Depending on the carburetor, believe it can destroy the power valves. Don't think it should hurt the plugs.

[corvette8n]

You could start a fire, I had this happen on a school bus non flathead motor, burnt the wiring up before we could get the fire out.

[grumppyoldman]

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Is it backfiring through the carb. or tailpipe? If it's the tailpipe pour some MMO through the carb. keep it running for 5 or 10 seconds then flood it with a big gulp of MMO and let it set for a while. You can also use automatic trans. fluid. Valves could be sticking and this helps to clean them. Al