If the oil cooler relief valve sticks in the open position, what is the likely result?

When the oil cooler relief valve sticks in the open position, it allows oil to bypass the cooler instead of passing through it. This means that the oil, which should be cooled down as it circulates through the cooler, will not undergo that essential cooling process. As a result, the oil will not lose heat effectively, leading to an increase in oil temperature.

In an engine system, maintaining optimal oil temperature is crucial for reducing friction and wear, ensuring efficient operation, and preventing overheating. If the oil temperature rises due to the bypassing of the cooler, it can negatively affect engine performance and longevity. Thus, the likelihood of increased oil temperature due to the relief valve being stuck open is a critical outcome of this scenario.