Oil Coming Past Spark Plug

[ryan_thompson87]

Hi everybody I'm new here and I have what is apparently a unique problem. I have oil working its way through the threads of the spark plug on #3. As far as i know ive never seen or heard of anyone else with a problem like this. The engine is a 355 with Vortec heads an intake a mild cam and headers. Its got about 10:1 compression, as a side question whats that in PSI? its not the plug as i have switched various plugs around. Its only got about 1300 miles on the motor since the complete rebuild. The heads are rebuilt also. Another problem it has that perplexes me is it burns oil on start up which seems like valve seals but it only does it if I run it up to operating temp and shut it off for about 20 minutes an hour. If it sits overnight it doesnt puff at all. Are the two possibly connected? Im at wits end about this d**n plug, any help is appreciated.

[clearoyd]

Have you done any diagnostic tests? I would start with a compression and leakdown test. You also might want to pull the valve cover and inspect the valve guide seals, springs, retainers, etc. Is the oil fouling bad enough to cause a misfire?

[ryan_thompson87]

No its not causing a misfire it runs strong