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