Buick Valve Covers

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Buick Valve Covers

Oil leaking from the underside of your Buick? Sure, you can always blame it on the oil pan and the oil pan gasket. After all, it is where the oil really resides. But do you know that other engine components may also be the cause of oil leaks? In fact, vehicle oil leaks are very seldom caused by the oil pan and the oil pan gasket. Instead, most automobile oil leaks are caused by failed oil pressure switches, faulty oil filters and worn out oil drain plug washers. Another major cause of oil leaks is a damaged valve cover or defective valve cover gasket.

The Buick valve cover is the long lid made of either metal or plastic that rests on top of your vehicle's cylinder head(s). In your Buick, you may find one or two of this lid, the number of which basically depending on the engine's configuration and the number of cylinder heads present. The primary function of the valve cover is to protect the various valve train components, particularly the valves and the rocker arms, from various damages. With a valve cover gasket to further tighten the seal between it and the cylinder head, the valve cover can do its job efficiently.

Valve covers, however, have another function, and that is to serve as pool for lubricant oil as they drip back to the bottom of the engine block. To lubricate the various parts of the engine, oil is pumped from the bottom to the top of the block. As the oil drips back down, it would first pool in the valve cover before eventually dripping into the drain back holes inside the cylinder head. Again, with a valve cover gasket to tighten the seal between the valve cover and the cylinder head, it is impossible for oil to leak.

But why would oil leak out of the valve cover or the gasket? Valve covers are meant to be removable for easy access to the valves when they need adjustments. Each time that the valve cover is removed, however, there is a need to replace the valve cover gasket with a new one. Improper installation of the valve cover gasket is usually the cause of oil leaks. Another cause is the warping of the valve cover or the damages it incurs during removal and replacement.

So the next time that your Buick experiences an oil leak, put the blame off the oil pan and find the real problem. If it is the Buick valve cover or valve cover gasket that is causing the problem, better replace it with a new one from Parts Train.