I had a used engine put in less than 500 miles ago. All fluids were replaced and it ran good. No leaks, No Smoke , oil was 5w30. A compression check was done before I bought the used engine and it was fine. I don't want to have some one go through the engine before I gather all facts on what can cause this problem.I bought a Chilton's repair book and it helps but if someone else out there has had the same problem and it was not something to do with the internal motor parts. I really need to Know. I also know that gunk can block oil ports in some engine parts. Is there a product that I can purchase to flush the motor out and does it work? Some Problems that cause oil consumption are: dirty cooling System,faulty mass air flow sensor, clogged pcv valve , restricted air intake. I checked the air filter and its clean what else could restict air flow? Thanks for any information that you can give me. One more question. The shop that installed the engine informed me that the old engine was equiped with an oil cooling unit but they did not install it on the one they put in because the engine was out of a 1990 Astro van and it did not come with one. By any chance could this be the problem?
Original Post
