S20Workstation4
Well-Known Member
Hello All,
2010 Ford Expedition EL XLT 4x4 - 219,000 Miles
I did a full timing set back in August 2022 with all Ford OE Parts, except the Melling M340HV Oil Pump. I've only driven the vehicle about 800 miles since August, and I just noticed the rattle happening again.
However, the rattle lasts for only about 1/2 a second, it is a very small rattle and doesn't last like the rattle normally does, which is 1-2 seconds. It defintely sounds like the timing chain.
I faced a camera towards the passenger side chain and recorded, while I turned the engine over by hand. The chain gains slack, then becomes tight, then gains slack again, then becomes tight again... it does this as long as I keep turning the engine over by hand. Is it normal for the chain to gain slack and then become tight again, doing it over and over again?
Could it be a tensioner that has gone bad already? I don't know how the tensioner could blow this quickly in only 800 miles...
Thank you,
-Joseph
2010 Ford Expedition EL XLT 4x4 - 219,000 Miles
I did a full timing set back in August 2022 with all Ford OE Parts, except the Melling M340HV Oil Pump. I've only driven the vehicle about 800 miles since August, and I just noticed the rattle happening again.
However, the rattle lasts for only about 1/2 a second, it is a very small rattle and doesn't last like the rattle normally does, which is 1-2 seconds. It defintely sounds like the timing chain.
I faced a camera towards the passenger side chain and recorded, while I turned the engine over by hand. The chain gains slack, then becomes tight, then gains slack again, then becomes tight again... it does this as long as I keep turning the engine over by hand. Is it normal for the chain to gain slack and then become tight again, doing it over and over again?
Could it be a tensioner that has gone bad already? I don't know how the tensioner could blow this quickly in only 800 miles...
Thank you,
-Joseph