Mechanical Gas Fuel System G5.9, G8.3, G855 – Master Repair Manual 013-048   Ignition Coil (Shielded)

Preparatory Steps

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 WARNING 

To reduce the possibility of personal injury, do not touch any ignition wires or components while the engine is operating, unless using suitably insulated tools.

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Remove

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 WARNING 

To reduce the possibility of personal injury, do not touch any ignition wires or components while the engine is operating, unless using suitably insulated tools.

Disconnect the wiring harness from the ignition coil.

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Remove the capscrews and ignition coil from the mounting bracket.

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Inspect for Reuse

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Inspect the ignition coil pack and bracket for cracks, corrosion, connector pin damage, and high voltage tower damage.

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Inspect the weld interface between the coil bracket and the coil case for cracks, wear, or other damage.

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Check for Short Circuit to Ground

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Measure the resistance between the negative primary pin (1) of each coil connector and the engine block. The resistance must be greater than 10M ohms.

Measure the resistance between the positive primary pin (2) and negative primary pin (1). The resistance must be less than 1 ohm.

Measure the resistance between the negative primary pin (1) and the high voltage secondary electrode (3). The resistance must be in the range of 3000 to 8000 ohms.

If any of the resistance measurements are not within the specified range, the coil must be replaced.

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Install

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Install the ignition coil onto the mounting bracket.

Install and tighten the capscrews.

There are two designs of mounting hardware; the hex head capscrew and the captive washer capscrew.

For the hex head capscrew configuration, there are two flat washers with different diameters. Be certain the larger diameter washer (2) is placed below the smaller diameter washer (1) as shown in the illustration.

Torque Value:  24  n.m  [212 in-lb]

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The captive washer capscrew configuration has a captive lock washer and a large diameter flat washer (1). Install the flat washer as shown the illustration.

Install and tighten the capscrews.

Torque Value:  24  n.m  [212 in-lb]

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Connect the ignition wiring harness to the ignition coil.

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Finishing Steps

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Last Modified:  14-Jul-2009