Ignition System - Service Information: Removal & Installation RAM Pickup 2500

REMOVAL

The coil capacitor is located in the right-rear section of the engine compartment. It is attached with a mounting stud and nut.

1. Disconnect electrical connector (5) at capacitor.
2. Remove mounting nut and remove ground strap.
3. Remove capacitor (1).

INSTALLATION

1. Position capacitor (1) to mounting stud (2).
2. Position ground strap (3) to mounting stud (2).
3. Tighten nut (4) to 7 N.m (60 in. lbs.) torque.
4. Connect electrical connector (5) to coil capacitor.

Scheme 5

Note. An ignition coil (2) with a spark plug wire (1) attached is used for two cylinders. The three coils fits into machined holes in the cylinder head for cylinders 1, 3, and 5. A mounting stud/nut secures each coil to the top of the intake manifold. The bottom of the coil is equipped with a rubber boot (4) to seal the spark plug (5) to the coil. Inside each rubber boot is a spring. The spring is used for a mechanical contact between the coil and the top of the spark plug. These rubber boots and springs are a permanent part of the coil and are not serviced separately. An O-ring is used to seal the coil at the opening into the cylinder head.

Scheme 6

1. Depending on which coil is being removed, the throttle body air intake tube or intake box may need to be removed to gain access to coil.
2. Disconnect electrical connector from coil by pushing downward on release lock on top of connector and pull connector from coil.
3. Disconnect spark plug wire from coil (1).
4. Clean area at base of coil with compressed air before removal.
5. Remove coil mounting bolt.
6. Carefully pull up coil (1) from cylinder head opening with a slight twisting action.
7. Remove coil from vehicle.

Scheme 7

An individual ignition coil (1) is used for each pair of spark plugs. Each coil attaches directly to the top of the eight upper bank of spark plugs. Secondary cables (3) connect each coil to the eight lower bank of spark plugs. The coils themselves fit into machined holes in the cylinder head. Each coil also has its own individual electrical connector (2).

Note. The bolt used to mount the ignition coil assembly is the same bolt used to mount the intake manifold. If replacing either one or all eight coils, check and re-torque all eight bolts.

A mounting bolt (3) secures each coil assembly to the top of the intake manifold. The bottom of the coil assembly is equipped with a rubber boot (4) to seal the spark plug (5) to the coil. Inside each rubber boot is a spring. The spring is used for a mechanical contact between the coil and the top of the upper bank of spark plugs. These rubber boots and springs are a permanent part of the coil assembly and are not serviced separately. The rubber boot (4) is also used to seal the coil at the opening into the cylinder head.

1. Depending on which coil assembly is being removed, the throttle body air intake tube or intake box may need to be removed, to gain access to the coil.
2. Disconnect the electrical connector (2) from the coil assembly by pushing downward on the release lock on the top of the connector and pull connector from the coil.
3. Disconnect the secondary cable (3) at the coil assembly.
4. Clean the area at the base of the coil assembly with compressed air before removal.
5. Remove the coil assembly mounting bolt (3).
6. Carefully pull up the coil assembly (2) from the cylinder head opening with a slight twisting action. This helps to disengage the rubber boot (4) from the spark plug (5).
7. Remove the coil assembly from the engine.

Scheme 8

Scheme 9

1. Disconnect the electrical connector (1) from coil (3).
2. Clean area at base of coil with compressed air before removal.
3. Remove two mounting bolts (2) (note that mounting bolts are retained to coil).
4. Carefully pull up coil (1) from valve cover.
5. Remove coil (1) from vehicle.