GM 12681663
Spark Plug

The replacement of spark plugs must wait until the engine cools down to avoid aluminum cylinder heads damage. The initial step involves removing the ignition coil housing before applying a Spark Plug socket to remove sparks plugs. After removal the technician needs to dry Spark Plug holes thoroughly with compressed air. Double-check spark plugs for any damage routines permit. A round wire type Spark Plug gap gage should be used to gap new spark plugs to a precise measurement of 1.14 mm (0.045 in). The use of Spark Plug sockets enables proper plug installation while users should avoid applying anti-seize compound directly on spark plugs to safeguard against head thread damage and excessive torque. As the final step tighten the spark plugs to 20 n.m (15 lb ft) before putting back the ignition coil housing.

To start the replacement of spark plugs, begin by removing ignition coils before cleaning Spark Plug recesses using low-pressure air while wearing protective safety glasses against flying dirt. Cleansing Spark Plug recesses ahead of removal will stop foreign substances from getting into the Cylinder Head since such contamination may damage both the engine and the Cylinder Head threads thereby blocking proper new plug fitting; run a thread chaser to clear thread pollutants. Take care to wait until the engine temperatures drop to room level before plug extraction to stop threaded plug issues that can harm Cylinder Head components. To verify proper functionality measure the gap of new spark plugs with a round feeler gage while ensuring it conforms to the specified gap needs after spark plugs get removed. Users should only install the spark plugs approved for the vehicle since different heat levels can destroy the engine components. Hot plug setup requires you to carefully insert them into the Cylinder Head while checking for smooth threads and full seating. For better results use a thread chaser (Thread Chaser) to prevent cross-threading and inhibit incomplete seating that could damage the engine through overheating and exhausted gas leaks. Secure the ignition coils by tightening their spark plugs to 18 n.m (13 lb ft) before reinstalling them.

One must remove ignition coils before starting the Spark Plug replacement process. Wear safety glasses for your eyes when operating compressed air since dirt particles may fly toward your face. Prepare the Spark Plug recess by cleaning it properly before removal to stop foreign debris from entering the Cylinder Head while performing these steps use a thread chaser to remove any contaminating substances from inside the threads. Before you remove spark plugs from a cooling engine it is crucial to clean the recesses with low-pressure air to prevent the threads from seizing. Any inspection of spark plugs must occur after plug removal. For engine safety use only the spark plugs recommended by the manufacturer because using different heat-levels of plugs may cause major engine damage. A round feeler gauge should be used to check the gap of all new and reconditioned spark plugs prior to installation because pre-set gaps might alter during handling and improper gaps could lead to both diminished engine performance and equipment damage. Compare the measured Spark Plug gap to its specifications and adjust it when needed. A thread chaser should be used to install the spark plugs because it helps avoid overheating while preventing exhaust blow-by and thread damage. The Cylinder Head requires the plug to fit smoothly and be completely seated. Put the spark plugs into the Cylinder Head and fasten them at 18 n.m (13 lb ft) before installing the ignition coils.

Always let the engine cool down so you do not risk damaging the Spark Plug threads or Cylinder Head. Remove the ignition coil housing at the start and clean out the Spark Plug holes with compressed air to get rid of any water and contaminants. Remove the spark plugs after that and see if there is any damage. Don't use anti-seize compound on the new spark plugs to make sure you don't overtighten and hurt the Cylinder Head threads. Look at the gap with a wire type Spark Plug gap gage, and set the spark plugs, tightening them to 20 n.m (15 lb ft). At last, put the ignition coil housing in position again.

Replace the spark plugs by first eliminating ignition coils from the engine. Wear protective glasses because compressed air operation may result in flying dirt particles causing eye damage. The Spark Plug recess area should undergo cleaning before removal to prevent foreign material from entering the Cylinder Head because such debris would harm the engine or contaminate the cylinder threads which might lead to improper new plug fitting; utilize a thread chaser to clean thread contamination. Low-pressure air cleaning should be used to prep Spark Plug recesses before waiting for complete engine cooling to reduce the risks of damaging Cylinder Head threads through plug thread seizing. Examine the removed spark plugs when the inspection ends. The engine needs its exact recommended spark plugs because alternative plug temperatures either hot or cold will cause serious engine damage. Use a round feeler gauge to measure sparkling gaps on new and reconditioned spark plugs before using them because the initial installation might change preinstalled gaps which can cause engine malfunction and destruction. Compare the Spark Plug gap to its specified value while making any necessary corrections. A thread chaser should be used for cleaning the threads during installation while checking that each Spark Plug threads properly before achieving full seat position. Fitting the spark plugs into each Cylinder Head requires a 18 nm (13 lb ft) of torque application. Finally, install the ignition coils.

The first step in replacing spark plugs requires ignition coils removal. When using compressed air while working always wear safety glasses to protect your eyes from flying dirt particles. A thorough cleaning of the plug recess will help stop dirt from entering the Cylinder Head preventing both engine damage and thread contamination while assisting with new plug seating. A thread chaser will remove any thread contamination. Let the engine cool while using low-pressure air to clean Spark Plug recesses so the plug threads don't seize or damage the Cylinder Head threads. You should examine the spark plugs following their removal. Use spark plugs designed for your vehicle because differing designs might create serious engine harm. A round feeler gauge should be used to check the gap on new along with reconditioned spark plugs before installment because they often get altered during their handling period. The use of incorrect gap settings may result in engine deterioration and failure. Use a round feeler gauge to measure the Spark Plug gap then adjust it according to specifications. Check that the Spark Plug threads reward resistance when inserted into the Cylinder Head while maintaining full seat depth by utilizing thread chasers to clean dirt from threads. Secure the spark plugs within the Cylinder Head using a torque of 18 nm (13 lb ft) before completion. Finally, install the ignition coils.

Installing plugs that are hotter or colder can severely damage the engine.

Measure the spark plug gap and compare it to the specifications, ensuring that the spark plug threads smoothly into the cylinder head and is fully seated.

First, remove the ignition coils and clean the spark plug recesses with low pressure air while wearing safety glasses.

Check for any corrosion before reinstalling the ignition coils.

A 5/8 inch spark plug socket is used to remove the spark plugs.

No, it is crucial not to coat the spark plugs with anti-seize compound to avoid over-torquing and potential damage to the cylinder head threads.

A 5/8 inch spark plug socket.

The spark plug gap should be set to 1.1 mm (0.45 in).

Inspect the spark plugs for any issues.

Ensure the engine has cooled to prevent damage to the aluminum cylinder heads.

No, do not coat the threads with anti-seize compound, as this can lead to damage of the cylinder head threads if the plugs are over-torqued.

Use only the specified spark plugs, as using plugs that are hotter or colder can severely damage the engine.

Reinstall the ignition coil(s).

Tighten the spark plugs to 20 N.m (15 lb ft).

Turn the ignition OFF and disconnect the electronic ignition (EI) module harness connector.

Removing spark plugs from a hot engine may cause the plug threads to seize and damage the cylinder head threads.

The spark plug threads should smoothly enter and be fully seated.

Use a thread chaser to clean any contamination.

Reinstall the spark plug wire and, if it was removed, the washer solvent container.

Use a thread chaser to clean any contamination from the threads.