![]() ![]() Combustion chambers get extremely hot, and as the pistons age, this heat can become too much for them. While damaged or cracked pistons are rare, it’s not entirely unheard of. So, if you suspect damaged compression rings, it’s best to repair them as soon as possible. These rings keep everything running smoothly and prevent more significant problems. But when these compression rings are damaged, nothing is keeping the oil from seeping into the combustion chamber. #5 – Damaged Piston Compression RingsĪround each piston in your engine, there are compression rings that keep oil from seeping into the combustion chamber. Like head gaskets, valve cover gaskets are cheap but it’s a labor-intensive process to replace them. But if the valve cover gasket is leaking, then oil can easily seep into the spark plugs. One of the components it keeps oil away from are the spark plugs. Your vehicle uses valve cover gaskets to keep oil near components that need it and away from those that don’t. See Also: 3 Causes of Oil in an Intake Manifold #4 – Valve Cover Gasket Leaking Like other components here, valve guides themselves aren’t that expensive, but they require a lot of work and time to replace – which can rack up a massive bill at the repair shop. If those seals give out, then oil gets into the combustion chamber, and it’s a quick hop, skip, and jump away from getting on the spark plug gaskets. Not only that, but they have seals that keep oil out of the combustion chamber. Valve guides ensure that your intake and exhaust valves stay in the appropriate position at all times. See Also: Cylinder Head Repair Cost #3 – Worn/Leaking Valve Guides The good news is that head gaskets are cheap – the bad news is that it’s a labor-intensive process. You’ll need to replace the head gasket before the problem worsens and leads to more severe concerns. You’ll notice excessive smoke, oil in your coolant reservoir, and there will be some oil on the tip of your spark plugs. When that happens, it’s common for oil to get into the combustion chamber. While coolant in your compression chamber is what most people associate with a blown head gasket, another fluid that could be leaking is oil. See Also: Spark Plug Socket Sizes #2 – Blown Head Gasket Leaky O-ring seals can cause your engine to misfire and lead to more extensive damages. However, you still need to address the problem as soon as possible. This is one of the best outcomes if you have oil on your spark plugs. If you only have oil on one spark plug, you might have a leaky O-ring seal. These O-rings keep oil and everything else on one side of the spark plug, and the other side remains dry. While your spark plugs might not have a gasket, they do use O-rings. It’s not like there’s a spark plug gasket that’s leaking – so what’s going on? We’ve highlighted the most common reasons there might be oil on your spark plugs below. Once you’ve discovered oil on your spark plugs, it’s time to dive into why it’s there. Can You Drive With Oil On Your Spark Plugs?.Reasons There’s Oil On Your Spark Plugs. ![]()
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