In a message dated 5/23/01 6:12:44 PM Eastern Daylight Time,
chuckc@attglobal.net writes:
> Hmmm. But how/why would that bit of "weeped" fuel get into
> a cylinder a) before the regular intake of fuel when the intake valve
> opens, and 2) at such a time that the explosion occurred when the
> exhaust valve was open (after ??) normal ignition, so that the
>
- - - - - - - - - - - - - - -
Liquid fuel can leak a bit thru a closed intake valve, especially if it is an
old valve and doesn't seat perfectly. Liquid fuel in the cylinder doesn't
burn. It has to be an air/fuel mixture. When a bit of liquid fuel gets into
the exhaust manifold, it can be ignited by hot exhaust gasses, which creates
an exhaust explosion heard at the tailpipe. (I think. Well, I'm a salesman
so I can be convincing!)
Allen Hefner
SCCA Philly Region Rally Steward
'77 Midget
'92 Mitsubishi Expo LRV Sport
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