Re: No gasket ring on Hemi plugs? was Re: IML: 58 Imperial info

[Crown58imp@xxxxxxx]

Hello Mick. Spark plug seals (the ones that press fit into the cylinder 
heads) were not used in the factory. I know several companies that peddle 
them to Hemi owners claimming that they offer better sealing against oil 
pouring into the combustion chambers. I do not know if this is a problem as 
my own engine is not running yet. It is my opinion that this part is most 
often used by hot-rodders rather than restorers. Their engines are suped for 
racing or street performace which may or may not require these extra seals. 
The spark plugs screw in far enough so that there should not be oil seepage 
in the combustion chambers during normal operation of the engine. I would 
like to hear from members who may be using these seals as to their 
usefullness. Bye for now.

               Doug
               58 Crown coupe