mosinman
Well-Known Member
- Joined
- April 26, 2002
- Messages
- 484
- Reaction score
- 0
- City, State
- Coppell, Tx
- Year, Model & Trim Level
- 1999 XLT
After changing my oil I noticed that at startup I was hearing lower engine knocking sounds for a few seconds. This happened at every startup and sometimes even at idle. I had just switched to Purolator Pure1 from the Motorcraft FL1-a. I bought a new Motorcraft and took off the purolator. NO oil spilled out when I unscrewed the filter. The anti-drainback valve had failed! Put in the Motorcraft and noises went away. I am aware that Purolator makes the Motorcraft filter but I thought this was interesting. Guess I'll stick with the Motorcraft.