- December 28, 2010
- Reaction score
- City, State
- Russell, Ontario (Ottawa area)
- Year, Model & Trim Level
- 2020 Aviator Reserve
Often the tensioners are oil pressure actuated and rattle first after they drain, and lose their holding pressure. Not sure if these motors use hydraulic tensioners, or not.If it was the timing chain wouldn't it make noise every time you started the engine? If it runs/starts normally at all other times I wonder how serious it could be. Are oil and fluid levels where they should be? Any exhaust smoke?
The cold start rattle always happen on cold start and even after an oil change. Unless the Tech did not put in enough oil when he changed the oil.That is definitely not turbo rattle. You may have an oil pressure issue or some kind of blockage around the pump/pickup. What is the oil level and what does it look like? I would try pouring some oil in right before you start it and see if there is any difference. That would help rule out a possible oil pump/pressure issue.
I know I’m late to this thread but was wondering if you got any answers about the rattle and the 50-60 shudder. I’m having the exact same problem with my 14sport explorer.No, I have not had the issue resolved yet and it has been over 1.5 years since the issue first appeared. There is another issue that nobody seems to be able to diagnose, which is the shudder at 50 to 60 mph.
Drivetrain shudder that does not go away could be the PTU (power transfer unit) or bad / unbalanced tires. Obviously check the tires first or move the front ones to the back and see if it continues or changes. The PTU is the weakest link on the Sport drivetrainI know I’m late to this thread but was wondering if you got any answers about the rattle and the 50-60 shudder. I’m having the exact same problem with my 14sport explorer.
Yes, I had the timing chain replaced last summer and it got rid of it. My Explorer was sluggish and wanting to stall on a hill and soon after that it had a service engine light showed up intermittently. We plug the scan tool in and it showed a DTC for cam shaft sensor. Took it to the dealer and they did a further diagnostic and told me the timing chain was slacked. After the chain replacement, the shudder was gone and the rpm between 50 and 60 is a bit higher than before the timing belt replacement.I know I’m late to this thread but was wondering if you got any answers about the rattle and the 50-60 shudder. I’m having the exact same problem with my 14sport explorer.