How do you change the spark plugs on a 2005 dodge ram 4.7L?

Answer 1

Removal

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Each individual spark plug is located under each

ignition coil. Each individual ignition coil must be

removed to gain access to each spark plug. Refer to

Ignition Coil Removal/Installation.

(1) Remove necessary air filter tubing at throttle

body.

(2) Prior to removing ignition coil, spray compressed

air around coil base at cylinder head.

(3) Prior to removing spark plug, spray compressed

air into cylinder head opening. This will help

prevent foreign material from entering combustion

chamber.

(4) Remove spark plug from cylinder head using a

quality socket with a rubber or foam insert. Also

check condition of ignition coil o-ring and replace as

necessary.

(5) Inspect spark plug condition. Refer to Diagnostics

and Testing - Spark Plug Conditions.

Installation

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CAUTION: The 4.7L V-8 engine is equipped with

copper core ground electrode spark plugs. They

must be replaced with the same type/number spark

plug as the original. If another spark plug is substituted,

pre-ignition will result.

Special care should be taken when installing spark

plugs into the cylinder head spark plug wells. Be

sure the plugs do not drop into the plug wells as electrodes

can be damaged.

Always tighten spark plugs to the specified torque.

Over tightening can cause distortion resulting in a

change in the spark plug gap or a cracked porcelain

insulator.

(1) Start the spark plug into the cylinder head by

hand to avoid cross threading.

(2) Tighten spark plugs. Refer to torque specifications.

(3) Before installing ignition coil(s), check condition

of coil o-ring and replace as necessary. To aid in

coil installation, apply silicone to coil o-ring.

(4) Install ignition coil(s). Refer to Ignition Coil

Removal/Installation.