I have a 2000 Avalon XLS with 150,000 miles on it. When the engine is cold (I live in central FL) it has a "clacking" sound at 2300 to 3000 rpm. It doesn't happen when engine warms up to normal operating temp, or at any other RPM's. I've been using synthetic oil for the past 50k miles. Could this be caused by "SLUDGE". Thanks guys.
- posted
16 years ago