Hello, I have a 1992 ford E350 Cutaway RV with the 7.5 liter normally aspired engine with 71,000 miles. Looking for the OEM plug brand and number. Also, want to know the best process for accessing the plug removal and reinstall. Should the engine be warm or cold for removal. Not sure the plugs have ever been changed. Wondering about the best access position. Understand the front plugs are almost impossible to access. Can they be better accessed by hole sawing through the inner fender?
Anyone have suggestions about special tools or techniques to change out these 1992 plugs and also replacing the plug wires is greatly appreciated.


Professor Bob

 

If you remove the air cleaner housing, 2 screws, 2 hose clamps on the throttle body hoses and the PCV vent hose and the housing comes off.
Big difference there, also the rear plugs are easier to access from inside the vehicle with the doghouse removed. The passenger side is a different story. I have removed the battery from the upper passenger side of the engine compartment and was able to get to and replace the plugs a lot easier.
i would suggest you stick with Motorcraft plugs. The auto supply store should be able to supply the correct plugs, make sure you set the gap, they don't come set to the correct gap.
If you can , stick with Motorcraft wires and replace them ONE AT A TIME !!