DO NOT under any circumstances try to install a helicoil. Check with the machine shops or auto repair shops and find someone that is familar with BIG SERT. It is a special insert that is inserted into the spark plug hole. It is much more heavy duty than a helicoil. It requires special tools provided with the repair kit. The cost should be around $200.00 to $225.00. The spark plug and coil would be extra. It beats the cost of replacing the cylinder head.
The recommended spark plug gap for a 2003 Ford Expedition 4.6 is .054"
Check under the hood decal info.
In a 2002 Ford Expedition : ( No , not really ) both the 4.6 and the 5.4 have the Coil On Plug ( C.O.P. ) ignition system , but there is a connection between the individual coil and the spark plug
Ford Expedition.
at each spark plug
There 8 Spark plugs not 4.
No , both the 4.6 and 5.4 liter V8 engines in a 2000 Ford Expedition have Coil On Plug ( C.O.P. ) ignition systems
Driver's side front
The are no distributor cap on the 1997 Ford Expedition. You have eight coil packs one on each spark plug.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition
Passenger side , 3rd plug from the front
On a Ford Expedition ( the # 1 engine cylinder / spark plug is on the passenger side ) firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle