When Your Mercury Villager Valve Cover Gasket Goes Bad
The valve cover gasket serves as a tight seal that protects the valve train from leaks. It is fitted between the valve cover and the cylinder head in order to prevent oil from seeping out. This component is very important in the efficient operation of your Mercury Villager's engine. However, a valve cover gasket is not exempted from wear and tear. Since it is commonly made from rubber, this gasket tends to fail over time. It may also be damaged or broken due to engine pressure. In case of a Mercury Villager valve cover gasket failure, here are the possible causes that you might want to look at:
As mentioned earlier, your gasket is susceptible to breakage due to pressure. What usually happens is that the Positive Crankcase Ventilation (PCV) valve serves as a vent for excess pressure in the engine and valve cover. However, when the PCV valve is searching for new areas to release the excess pressure, the valve cover gasket suffers and gets blown out. Cracks form on the gasket, which leads to leakage. Such damage would definitely require you to change your Villager's valve cover gasket.
First, you need to make sure that the spilled oil you are seeing is really due to a leak and not just a seep. Seepage is a minor issue that would not significantly affect the oil level in your vehicle and would not cause any serious trouble. It commonly occurs after your Villager has reached 30,000 miles. You may also notice that oil seep would eventually accumulate dust and dirt, but this is still not serious enough to necessitate valve cover gasket replacement.
Meanwhile, you would know that you have a leaking gasket if oil has started to form a puddle on the ground and continues to trickle while your Villager is driven. A leak is usually accompanied by smoke and a burning odor, which are due to oil that has gone straight to the exhaust manifold. It can also drain too much oil, which could drastically change the oil level and possibly cause serious engine damage. You would have to replace your Villager's valve cover gasket immediately if this is the case.