andy7 Posted April 30, 2021 Share Posted April 30, 2021 When carrying out a major service I found that all 3 Spark Plugs had oily threads in a Fiesta 1.0, is this head gasket related or the more serious piston ring issue? From the research I've done the suggestion is the former, although can't find a definitive answer, but will take a look hopefully this weekend. Anyone also know the part numbers for the gasket rings etc? TIA Quote Link to comment Share on other sites More sharing options...
Guest Posted April 30, 2021 Share Posted April 30, 2021 I suspect that your piston rings are at fault here. Clear signs of burning oil but this could also be due to over filling the oil or using the incorrect weighted oil. if the rings are bad, the engine will need a tear down and the cylinders rehomed and new rings or even new pistons installed. Also, the spark plugs may need to be gapped or spaced correctly. Quote Link to comment Share on other sites More sharing options...
Dicky68 Posted May 2, 2021 Share Posted May 2, 2021 Looks more like the engine is running far to rich causing black sooty deposits Quote Link to comment Share on other sites More sharing options...
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