4.0L Rear Timing Chain Jump

[greenierjoe]

Hello, I am a new member and been a Ford owner for 48 years. I just experienced a cracked right valve cover on my 2005 Explorer. Also I received 7 engine codes relating to the right bank of cylinders misfiring. I removed the valve cover and observed gouges where the chain came in contact with the cover. I see that the plastic guide had moved a bit and was able to pop it back in position. I removed the tensioner and discovered it to be grinding as I depressed it. I expect the loss of tension caused the chain to jump a tooth on the sprocket and crack the cover, giving me the codes. I expect replacement of the bad tensioner will solve the original problem, but how do I know which direction to move the chain on the sprocket to get it back to the correct timing?

 

[Tech By Trade]

Oh god, don't even try. Pull the engine and drop in a wrecker, or replace your guides. If it actually jumped time odds are all the valves are bent on that side anyway.

 

[greenierjoe]

Oh god, don't even try. Pull the engine and drop in a wrecker, or replace your guides. If it actually jumped time odds are all the valves are bent on that side anyway.

I did drive it for about 20 miles after the event to get home and the engine seemed to run fine except for the oil leak from the valve cover.

 

[greenierjoe]

Also, i just want to get it back together so i can get a new F150.

 

[Tech By Trade]

Which side went driver or passenger side?

 

[Tech By Trade]

I see now its the passenger side. Only option is to pull the engine and replace the guides or sell it as a mechanic special for pennies on the dollar. That or scrap.

 

[drdoom]

Which side went driver or passenger side?

My '97 popped a hole in the left cover a month or so back. I haven't had a chance to look at it yet (parked it).