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73-87 Chevy _ GMC Trucks => Performance => Topic started by: 305chevy c-10 on July 03, 2010, 12:23:08 pm

Title: oil on spark plug
Post by: 305chevy c-10 on July 03, 2010, 12:23:08 pm

hey i changed my spark plus and one of them has oil on it ....i was told that it means i have a leaking cyclider.it there something i can pour in there to fix that or motor needs rebuilt

Title: Re: oil on spark plug
Post by: 1981 ss chevy on July 03, 2010, 02:06:32 pm

Lucas makes a pretty good oil treatment that works well i used it in my old truck and it stopped all the blow by 

Title: Re: oil on spark plug
Post by: 305chevy c-10 on July 03, 2010, 09:22:08 pm

ok thanks

Title: Re: oil on spark plug
Post by: Irish_Alley on July 03, 2010, 11:43:53 pm

When you say on the plug you mean on the ceramic and the nut/threads? Could just be a leaky valve cover gasket dripping down on the spark plug

Title: Re: oil on spark plug
Post by: 305chevy c-10 on July 04, 2010, 09:21:33 am

its on the threads and the area where the spark occurs (gap)......just one plug was like this ......may plugs were cheap (autolite)......just put in ac decos

Title: Re: oil on spark plug
Post by: Irish_Alley on July 05, 2010, 12:37:01 am

replace the valve cover gasket