Engine auto parts: Sump plug
How to detect the sump drain plug failure
You can visually identify that the sump drain plug is worn out. If the component has a stripped thread, it cannot perform its function. Such component needs replacement. Sometimes the cause of the problem is that the drain plug seal is worn out. It also requires to be examined and replaced if faulty.
You may identify that the sump drain plug needs diagnosis by the following signs:
Causes of the sump drain plug failure
The main cause of the sump drain plug failure is improper usage. If you tighten it not using a torque wrench, the tightening torque is not controlled, and this results in damage to the thread in the part or in the oil sump itself.
Another reason why the drain plug does not perform its function is the sealing gasket wear. Ideally, it requires to be replaced with every oil change, since this part’s service life is short.
Repair and replacement of the sump drain plug
If the plug thread is stripped, then the plug is not repairable, it needs to be replaced. It is important that if the thread is stripped not only on the plug, but also on the oil pan itself, the measures will differ. You will either have to drill a threaded hole of a larger diameter in the oil sump for a new plug, or completely change the unit to a new one. If only the drain plug is damaged, its replacement is very easy: