Is a Leaking Front Crankshaft Oil Seal Serious?

[MacEloise]

In addition to wasting engine oil, a leaking front crankshaft oil seal can cause severe damage to the engine's internal components. Moreover, since the engine operates at very high temperatures, oil leakage onto the engine or other high-temperature parts can easily lead to spontaneous combustion. The reasons for a leaking rear crankshaft oil seal in a car engine are as follows: 1. During the installation of the crankshaft oil seal, the failure to use non-petroleum-based lubricants can cause the seal to loosen or even fall off after some time of engine use (for example, some engine manufacturers may use engine oil instead of relatively expensive non-petroleum-based lubricants to reduce production costs). 2. The parallelism between the rear oil seal pressing surface and the rear oil seal seat installation surface does not meet the technical requirements of the assembly drawing, resulting in uneven deformation of the rear oil seal lip. After some time of engine use, the lip of the oil seal may deform or even the entire seal may twist, leading to oil seal damage and oil leakage. 3. With prolonged engine use, the rear oil seal naturally ages, and cracks may develop at the lip, causing oil leakage.