If you should discover that your coolant is mixing with your engine oil, you have a major problem. While your motor oil and coolant are both essential to the proper operation of your vehicle's engine, ...

Q: I have a 1977 truck with a 400 small block. I rebuilt the top end, been driving for a while and now all of a sudden when I go over 40 mph and let off the gas a loud pop comes out of the left side ...