What happens to the spark plug when a valve cover leaks?

The spark plug tubes must remain clean and dry to allow the best possible ignition spark to occur. When a valve cover leaks, this tube will fill with engine oil and the oil will then get into the spark plug wire or ignition coil and short it out. The spark will then not make its way to the spark plug causing an engine misfire.

What happens when you replace a valve cover?

When a valve cover leaks, this tube will fill with engine oil and the oil will then get into the spark plug wire or ignition coil and short it out. The spark will then not make its way to the spark plug causing an engine misfire. If this occurs, you will need to replace the valve cover gasket and tube seals.

Can a leaking valve cover gasket cause smoke?

Yes, a leaking valve cover can sometimes leak onto your hot exhaust system and will cause some smoke and a possible burning smell. We recommend adding 1 bottle of BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/) to stop your oil loss. You can expect to start seeing results after about 100 miles of driving. Thank you!-BDP

What causes oil to leak out of a valve cover?

If the valve cover becomes loose or if the gasket material fails, the oil will begin to leak. Most valve covers will start leaking slowly without any effect on the engine. Over time, the leak will become larger and the engine oil will begin to coat different parts on the outside of the engine.

What happens if you have a bad valve cover gasket?

Engine is low on oil As oil leaks from the valve cover gasket, it leaves the oil pan. When this happens frequently, it can cause the Engine Oil Light to appear on your dashboard. If the engine oil is low, it will reduce its ability to properly lubricate internal engine components.

Can a valve cover be tightened to stop a leak?

In some rare cases, the valve cover can be tightened to stop the leak, but typically, once the leak occurs, it is too late and the gasket must be replaced. Fixing a small leak before it becomes large can also help you to diagnose other leaks in the future as it prevents excessive oil from building up on the engine.

What is the valve cover gasket made out of?

Most valve cover gaskets are made from plastic or cork and are used as a seal between the cylinder head and the valve cover itself. Although the valve cover gasket is well protected from the top and bottom, it is very delicate and prone to damage from the sides.

What happens to the spark plug when a valve cover leaks?