Asked in Mazda
I have 1992 Mazda it has a constant oil leak and you put oil in everyday so it is constantly full but now its starting to knock could it be my oil pump?
Yes, but this really has the sound of a worn engine.
Does it produce blue smoke after morning startup?
Let the engine idle for 15 minutes, then rev it to 2500 RPM for 3 seconds. Does it produce any blue smoke?
Hold the engine at a speed of 2500 RPM for 15 seconds. Is blue smoke formed?
Does a compression test, cylinder leakdown test, or running compression test reveal problems?
If the answer to any of these questions is yes, replace or rebuild the engine before you continue to puzzle out this problem.