* Oil Leaks: High pressure can force oil past seals and gaskets, leading to leaks. This can be anywhere from minor weeping to significant leaks.
* Damage to Oil Pump: The oil pump may be overworked trying to maintain the excessive pressure, leading to premature wear and eventual failure.
* Excessive Wear on Engine Components: While some components *need* high oil pressure to lubricate properly, excessively high pressure can put undue stress on bearings, seals, and other parts, contributing to faster wear. Think of it like over-inflating a tire – it can cause damage.
* Pressure Relief Valve Issues: The most likely culprit is a malfunctioning pressure relief valve. This valve is designed to release excess oil pressure. If it's stuck closed or failing, pressure will build up excessively.
* Incorrect Oil Viscosity: Using an oil that's too thick (high viscosity) for the operating temperature can also contribute to high oil pressure. This is especially problematic in cold weather.
* Faulty Oil Pressure Sensor: The sensor itself may be faulty, reading higher than the actual pressure. This is a relatively easy and inexpensive thing to check first.
In short: High oil pressure isn't inherently destructive in a short period like low pressure is, but it's a symptom of an underlying problem that needs to be addressed. Ignoring it will likely lead to more significant and expensive repairs down the line. The best course of action is to diagnose the root cause – a faulty pressure relief valve, a viscosity problem, or a sensor error – before any major damage occurs.
