Service manual

IGNITION SYSTEM

SERVICE MANUAL NUMBER 26

90-861329--1 MARCH 1999 Page 4B-7

Cleaning And Inspection

Spark Plugs

1. Inspect each plug individually for badly worn electrodes, glazed, broken or blistered

porcelain and replace plug where necessary.

2. Inspect each spark plug for manufacturer and heat range. All plugs must be the same

manufacturer and number or heat range. Refer to “Specifications” for spark plug num-

bers.

3. Check spark plug gaps with a round feeler gauge. Adjust if necessary.

50674

Spark Plug Detail

a-Porcelain Insulator

b-Check For Cracks In This Area of Porcelain

c-Shell

d-Proper Gap

e-Side Electrode (Gap Adjustment)

f-Center Electrode (File Flat When Adjusting Gap)

IMPORTANT: Tapered seat spark plugs are not interchangeable with non-tapered

(with gasket) spark plugs.

4. Clean spark plug seating area. DO NOT use gaskets on taper seat plugs. Install spark

plugs and torque to 22 lb-ft (30 Nm). Heat transfer and a gas-tight seal must be achieved.

Spark Plug Wires

1. Inspect spark plug wires for damage.

2. Check spark plug wires for continuity.

3. Replace any wires that are cracked, cut or have damaged spark plug boots.

4. Replace any wires that do not show continuity from end to end.

5. Reinstall spark plug wires in proper order.

IMPORTANT: Proper positioning in spark plug wires is important to prevent cross

firing.

Index