RepairPal Certified shops can diagnose and repair your 1999 Ford Expedition. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
The practical method is by checking the oil level using the DIP STICK..
IF oil level is correct - knocking sound is will require mechanical repair.
Good luck!
Do not overfill the engine with oil - that will NOT help!
Use the DIP STICK to check oil level - add oil as needed to bring oil level up to the full mark on DIP STICK - - Do not add any additional oil..
Do not overfill the engine with oil - that will NOT help! Use the DIP STICK to check oil level - add oil as needed to bring oil level up to the full mark on DIP STICK - - Do not add any additional oil..