The cause of an engine oil leak is a damaged engine oil cooler hose/pipe adapter gasket or a previous oil leak servicing of the engine oil cooler hose/pipe adapter gasket that involved failing to remove the temporary steel sealing device. Another reason may be the casting porosity at the engine oil cooler hose/pipe adapter bolt holes of the engine, and the engine oil cooler hose/pipe adapter bolts are not torqued to the proper specification.
By Bob
GM Specialist
10/12/2020
FAQ for Other Repair Info
Q: Is having water in your transmission bad?
A:
Yes, having water in your transmission is harmful to the internal transmission components as it will change the friction of clutches and result in low time durability of the components.