The Ford Barn - View Single Post - #4 Piston Engine Mystery

RichPA · 06-10-2011, 07:23 PM

Every time I've ever seen repeat piston failure of the same hole the root cause has been igntition at the wrong time either detonation or spark.Because it's always #4 I'm thinking spark.Maybe the distributor cap or rotor has a carbon trace or crack allowing a path for a stray spark ?

06-10-2011, 07:23 PM	#25
RichPA Senior Member Join Date: Sep 2010 Location: rowland PA Posts: 186	Re: #4 Piston Engine Mystery - Help Please Every time I've ever seen repeat piston failure of the same hole the root cause has been igntition at the wrong time either detonation or spark.Because it's always #4 I'm thinking spark.Maybe the distributor cap or rotor has a carbon trace or crack allowing a path for a stray spark ?