Inspection Of Spark Plugs Notice

• Never use a wire brush for cleaning.

• Never attempt to adjust the gap on a used plug.

• Spark plugs should be replaced every 60,000 miles (100,000 km).

Megger

Sparkplug Gap Toyota Sienna 2001

1. INSPECT ELECTRODE

If using a megger (insulation resistance meter):

(a) Remove the high-tension cords. (See page IG-6)

(b) Measure the insulation resistance. Correct insulation resistance: More than 10 Mil If less than 10 MI), proceed to step 2.

Amana Model Lea30aw

If not using a megger:

(a) Quickly race the engine to 4,000 rpm five times.

(b) Remove the spark plugs. (See procedure below)

Cc) Visually inspect the spark plugs.

If the electrode is dry Okay

If the electrode is wet—Proceed to step 3

2. REMOVE SPARK PLUGS

(a) Remove the high-tension cords. (See page IG-6)

(b) Using a plug wrench( 16 mm), remove the spark plugs.

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VISUALLY INSPECT SPARK PLUGS

Check the spark plug for thread or insulator damage.

If abnormal, replace the plug.

Recommended spark plugs: 7M-GE ND PQ16R

NGK BCPR5EP11

7MGTE ND PQ20RP8

NGK BCPR6EP-N8

INSPECT ELECTRODE GAP

Maximum electrode gap: 7M-GE 1.3 mm (0.051 in.)

If the gap is greater than maximum, replace the plug.

Correct electrode gap of new plug: 7M-GE 1.1 mm (0.043 in.) 7M-GTE 0.8 mm (0.031 in)

If adjusting the gap of a new plug, bend only the base of the ground electrode, do not touch the tip.

CLEAN SPARK PLUGS

If the electrode has traces of wet carbon, allow it to dry and then clean with a spark plug cleaner.

Air pressure: Below 6 kg/cm2 (85 psi. 588 kPa) Duration: 20 seconds or less

HINT: If there are traces of oil, remove it with gasoline before using the spark plug cleaner.

INSTALL SPARK PLUGS

(a) Using a plug wrench(16mm), install and torque the spark plugs.

(b) Install the high-tension cords.

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