How do I remove the spark plug to clean it? - YZ 250 F Yamaha Motorcycles

this is for a 3.6L engine, should be the same either way. doesnt seem extremely difficult

1. Turn the ignition OFF.
2. Remove the ignition coil.
3. Use compressed air in order to remove debris from the spark plug cavity.

CAUTION: Refer to Safety Glasses and Compressed Air Caution in Service Precautions .

NOTE: Clean the spark plug recess area before removing the spark plug. Failure to do so could result in engine damage because of dirt or foreign material entering the cylinder head, or by the contamination of the cylinder head threads. The contaminated threads may prevent the proper seating of the new plug. Use a thread chaser to clean the threads of any contamination.

1. Remove the spark plug.

NOTE: Allow the engine to cool before removing the spark plugs. Attempting to remove the spark plugs from a hot engine may cause the plug threads to seize, causing damage to cylinder head threads.

INSTALLATION PROCEDURE

1. Ensure that the spark plug gap is equivalent to the spark plug gap specification. Refer to Ignition System Specifications.

NOTE:

• Use only the spark plugs specified for use in the vehicle. Do not install spark plugs that are either hotter or colder than those specified for the vehicle. Installing spark plugs of another type can severely damage the engine.
• Check the gap of all new and reconditioned spark plugs before installation. The pre-set gaps may have changed during handling. Use a round feeler gage to ensure an accurate check. Installing the spark plugs with the wrong gap can cause poor engine performance and may even damage the engine.

1. Install the spark plug.

NOTE: Be sure that the spark plug threads smoothly into the cylinder head and the spark plug is fully seated. Use a thread chaser, if necessary, to clean threads in the cylinder head. Cross-threading or failing to fully seat the spark plug can cause overheating of the plug, exhaust blow-by, or thread damage.

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

1. Install the ignition coil.

REMOVAL PROCEDURE

1. Remove the ignition control modules.
2. Clean the spark plug recess area with low pressure air.

CAUTION: Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury.

NOTE: Clean the spark plug recess area before removing the spark plug. Failure to do so could result in engine damage because of dirt or foreign material entering the cylinder head, or by the contamination of the cylinder head threads. The contaminated threads may prevent the proper seating of the new plug. Use a thread chaser to clean the threads of any contamination.

1. Remove the spark plugs from the cylinder heads.

NOTE: Allow the engine to cool before removing the spark plugs. Attempting to remove the spark plugs from a hot engine may cause the plug threads to seize, causing damage to cylinder head threads.

1. Inspect the spark plugs. Refer to Spark Plug Inspection.

INSTALLATION PROCEDURE

1. Measure the spark plug gap on the spark plugs to be installed. Compare the measurement to the gap specifications.

NOTE:

• Use only the spark plugs specified for use in the vehicle. Do not install spark plugs that are either hotter or colder than those specified for the vehicle. Installing spark plugs of another type can severely damage the engine.
• Check the gap of all new and reconditioned spark plugs before installation. The pre-set gaps may have changed during handling. Use a round feeler gage to ensure an accurate check. Installing the spark plugs with the wrong gap can cause poor engine performance and may even damage the engine.

1. Install the spark plugs to the cylinder heads.

NOTE:

• Be sure that the spark plug threads smoothly into the cylinder head and the spark plug is fully seated. Use a thread chaser, if necessary, to clean threads in the cylinder head. Cross-threading or failing to fully seat the spark plug can cause overheating of the plug, exhaust blow-by, or thread damage.
• Refer to Component Fastener Tightening Notice in Service Precautions.

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

1. Install the ignition control modules.

Clean or change air filter. Clean, gap or change spark plug. Empty gas tank add fresh gas with Stabil. When spark plug is removed pull rope several times to blow out cylinder. Spray starter fluid in spark plug hole before replacing spark plug. Clean outside of carb so choke works freely. Spray starter fluid into carb breather hole with air filter removed and try to start. if running replace air filter and cover. If no start disassemble carb and clean. If no start replace carb.

Hi chldrz...
Remove the spark plug, clean post and arm with a wire brush, and then use light sandpaper to clean and level the two firing surfaces...(the post and the arm)
Replace plug if it wors fine, if not replace the plug.
Please take time to rate me
Thanks,
Bud

First, I would highly recommend that you also purchase a set of igniton cables and replace these also because you are most likely to have damaged spark plug boots when you remove the boots from the plugs. Trust me...it happens about 95% of the time, and you will be way ahead of the frustration if you are prepaired.

Pull the spark plug boots off of the spark plugs.

NOTE:

Allow the engine to cool before removing the spark plugs. Attempting to remove the spark plugs from a hot engine may cause the plug threads to seize, causing damage to cylinder head threads.

Clean the spark plug recess area before removing the spark plug. (spray brake cleaner and compressed air works well) Failure to do so could result in severe engine damage because of dirt or foreign material entering the cylinder head, or by the contamination of the cylinder head threads. The contaminated threads may prevent the proper seating of the new plug. Use a thread chaser to clean the threads of any contamination.

Screw the spark plugs out of the cylinder head.
Check the air gap at the electrode end of the spark plug.

The specification for the plug gap on your vehicle is 1.524mm (0.060 in)

Place a SMALL amount of nickle-based antiseize compound on the spark plug thread, being very careful not to get any on the porcelain portin of the plug. If you do get antiseize on the porcelain part of the plug, it is imperative that you clean it off thouroughly using brake cleaner and a clean rag, otherwise it could cause cylinder misfires.

Screw the spark plug into the cylinder head and torque to specifications.
The spark plug torque specification for your vehicle is 15 Nm (11 ft. lbs.)

NOTE: Failure to properly torque the plugs can cause severe engine damage. Overtightening the plug can damage the threads in the cylinder head and/or make spark plug removal in the future impossible. This will cause you to have to remove the cylinder head for repair the next time the vehicle needs service on the spark plugs.
Undertightening can cause the plug to leak compression and damage the threads in the cylinder head. This can result in the plug blowing completely out of the head causing severe cylinder head damage.

When replacing the ignition cables, make sure they are routed EXACTLY as they were originally routed from the factory. Make sure that all protective wire loom and fasteners are transfered to the new wires and secured properly. Failure to do so can cause damage to the cables, engine misfires and can cause the spark plug wires to "spike" sensitive sensor circuits that are nearby and cause damage to the sensors or your computer modules. Improperly routed ignition cables have also been known to cause interference in radio and stereo systems.

HINT: The rear plugs on your engine are much easier to get to if you remove the two engine struts that go between the engine and the upper radiator support. You can then use a ratchet strap to pull the engine forward to get more room to work on the rear plugs.

THE BLOWERVAC COULD HAVE GAS PROBLEM OR A NO SPARK TO SPARK PLUG PROBLEM. TO DETERMINE THE SPARK PROBLEM FIRST, REMOVE THE SPARK PLUG, LOOK AT THE END OF THE SPARK PLUG (ENGINE END) TO SEE IF IT IS DRY OR WET WITH GAS, THEN RE-ATTACH THE SPARK WIRE WHILE THE SPARK PLUG IS LAYING LOOSE AND PULL THE ROPE TO TURN THE ENGINE AND LOOK TO SEE IF THERE IS SPARK OCCURING AT THE SPARK PLUG. IF THERE IS SPARK PRESENT, YOU HAVE NO PROBLEM WITH SPARK. REPLACE THE PLUG AND WIRE. IF NO SPARK CHECK YOUR WIRE LEADING TO THE SPARK PLUG TO MAKE SURE IT HAS AN ELECTRICAL CONNECTION AT BOTH ENDS, SPARK PLUG END AND ENGINE END. IF LOOSE FIX THE CONNECTION THEN RE-TRY THE SPARK/ENGINE TURN OVER BY ROPE METHOD AGAIN TO SEE THEN IF YOU HAVE SPARK. IF THEN YOU DO HAVE SPARK, RE-ATTACH SPARK PLUG TO THE ENGINE AND RE-ATTACH SPARK PLUG WIRE TO THE SPARK PLUG AND TRY THEN TO START THE ENGINE.
IF THERE WAS A WET PLUG WHEN YOU FIRST REMOVED THE SPARK PLUG AND YOU NOW HAVE SPARK AT THE SPARK PLUG, YOUR ENGINE SHOULD START.
IF IT STILL WILL NOT START AFTER THE SPARK CHECK, I WOULD REPLACE THE SPARK PLUG WITH A NEW ONE.
IF THEN IT WILL NOT START, THEN REMOVE THE SPARK PLUG AGAIN AND POUR A SMALL AMOUNT OF GAS INTO THE ENGINE SPARK PLUG HOLE. A PINT PLASTIC OIL CAP FULL OF GAS IS ENOUGH, DO NOT OVER USE MORE THEN THAT.
THE RE-ATTACH YOUR SPARK PLUG AND SPARK PLUG WIRE AND TRY STARTING THE ENGINE AGAIN. IT MAY TAKE SEVERAL PULLS TO GET THE EXTRA GAS IN THE SPARK HOLE TO BE USED UP BEFORE YOU START TO HEAR IT RUN ALITTLE AND FIRE NOW AND THEN.
IT SHOULD START THEN.
IF THEN IT DOES NOT START, YU HAVE USED UP THE GAS YOU PUT INTO THE ENGINE BY THE CAP FULL METHOD AND IT IS NOT GETTING GAS BY THE GAS TANK SUPPLY.
THIS MEANS THEN YOU HAVE AN IN LINE GAS LINE FILTER THAT IS PLUGGED UP OR YOUR GAS MAY BE OLD IN THE GAS TANK. IF GAS IS NOT OLD AND FILTER IS NOT PLUGGED, THEN YOU NEED TO REMOVE THE GAS LINE LEADING TO THE ENGINE CARBURATOR TO SEE IF IT WILL FLOW FROM THE GAS TANK OUT THE GAS LINE SUPPLY HOSE. IF IT DOES FLOW FREELY, THEN YOU DO NOT HAVE A GAS SUPPLY PROBLEM,
AS LONG AS YOUR GAS IS NOT OLD GAS. OLD GAS WILL GO BAD IN TIME. I'D REPLACE THE GAS WITH NEW AND TRY AGAIN.
IF THIS DOES NOT WORK, THEN ITS CARBURATION CLEAN UP TIME.
IT WILL NEED TO BE REMOVED FROM THE ENGINE BY A FEW BOLTS, HOSE'S REMOVED AND TAKEN APART AND CLEANED. TARNISH FROM GAS AND OIL WILL BLOCK THE CARBURATOR JETS AND VACCUM PUMP FROM WORKING PROPERLY. CLEAN AND REPLACE, TRY AGAIN TO START ENGINE.
MORE GAS IN SPARK PLUG HOLE TO GET GOING MAY BE ANOTHER ATEMPT AFTER CARBURATOR CLEAN UP.

Spark Plug removal procedure & gap info...

• Remove spark plug access cover. (Black cover on top of engine.)
• Once you have the black plastic cover off, number the coil packs with a magic marker 1 - 6 front to back so you can correctly replace them.
• Coil packs are held in with a pair of 10mm bolts (A and B in the illustration. Later 960s have only one bolt at A).
• Once you have the bolts out the pack should just pull out. A little twisting may help as there is an "O" ring seal at the top of the valve cover and a big boot at the spark plug.
• Remove coils from spark plugs. Do NOT disconnect coil wires. (VERY IMPORTANT)
• Inspect the condition of the wiring going to the coil pack. Look for crumbled insulation or charring. See 960 FAQ file for information on failing engine wiring harnesses.
• If you have comprssed air blow out the plug cavity before you take the plug out. As an alternative use a vacuum cleaner and brush to clean any "stuff" out of the hole to avoid having it fall into the cylinder.
• Remove spark plugs. Use a good quality, rubber insulated spark plug socket. Once they are unscrewed, you have to haul them up out of the hole.
• Check and adjust spark plug gap to: 0.030" (.75 mm)
• Install clean, "un-oiled", spark plugs and torque to: 18 ft. lbs .
• Refit ignition coils.
• Reinstall spark plug access cover.

• narrow-gap risk: spark might be too weak/small to ignite fuel;
• narrow-gap benefit: plug always fires on each cycle;
• wide-gap risk: plug might not fire, or miss at high speeds;
• wide-gap benefit: spark is strong for a clean burn.

They are underneath the coils,there will be a coil,and under the coil will be a spark plug boot connecting the coil to the spark plug.

2000 Oldsmobile Intrigue V6-214 3.5L VIN H SFI

Spark Plug: Service and Repair
REMOVAL PROCEDURE
TOOLS REQUIRED
J 43094 Spark Plug Boot Puller
1. Turn OFF the ignition switch.
2. Remove the ignition coil assembly.
3. Use the J 43094 in order to remove the spark plug boots from the spark plugs.
NOTE: Allow the engine to cool before removing the spark plugs. Attempting to remove the spark plugs from a hot engine may cause the plug
threads to seize causing damage to cylinder head threads.
NOTE: Clean the spark plug recess area before removing the spark plug. Failure to do so could result in engine damage because of dirt or
foreign material entering the cylinder head, or by the contamination of the cylinder head threads. The contaminated threads may prevent the
proper seating of the new plug. Use a thread chaser to clean the threads of any contamination.
4. Remove the spark plugs from the engine.
INSTALLATION PROCEDURE
NOTE: Use only the spark plugs specified for use in the vehicle. Do not install spark plugs that are either hotter or colder than those specified for the
vehicle. Installing spark plugs of another type can severely damage the engine.
NOTE: Check the gap of all new and reconditioned spark plugs before installation. The pre-set gaps may have changed during handling. Use a round
feeler gage to ensure an accurate check. Installing the spark plugs with the wrong gap can cause poor engine performance and may even damage the
engine.
1. Measure the spark plug gap on the spark plugs to be installed. Compare the measurement to the gap specifications. Refer to Spark Plug Usage.
Correct as necessary.
NOTE: Be sure that the spark plug threads smoothly into the cylinder head and the spark plug is fully seated. Use a thread chaser, if necessary,
to clean threads in the cylinder head. Cross-threading or failing to fully seat the spark plug can cause overheating of the plug, exhaust blow-by, or
thread damage.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Install the spark plugs to the engine.
Tighten
Tighten the spark plug to 20 N.m (15 lb ft).
3. Install the spark plug boots to the ignition coil assembly.


4. Install the ignition coil assembly.

Hello, I hope this info helps...(subytech1)...REMOVAL
In this engine, each individual spark plug is located under each ignition coil.

1. Prior to removing spark plug, spray compressed air around base ofignition coil at cylinder head. This will help prevent foreign materialfrom entering combustion chamber.
2. On this engine each individual ignition coil must be removedto gain access to each spark plug. Refer to Ignition CoilRemoval/Installation.
3. Check condition of coil O-ring and replace as necessary.

1. Inspect spark plug condition. Refer to Spark Plug Conditions.

CLEANING
Theplugs may be cleaned using commercially available spark plug cleaningequipment. After cleaning, file center electrode flat with a smallpoint file or jewelers file before adjusting gap.

CAUTION: Never use a motorized wire wheel brush to clean sparkplugs. Metallic deposits will remain on spark plug insulator and willcause plug misfire.

ADJUSTMENT

Setting Spark Plug Gap - Typical
Check spark plug gap with a gap gauge tool. If the gap is not correct,adjust it by bending ground electrode. Never attempt to adjust gap bybending center electrode.

INSTALLATION

CAUTION: This engine is equipped with copper core groundelectrode spark plugs. They must be replaced with the same type/numberspark plug as the original. If another spark plug is substituted,pre-ignition will result.

Special care should be taken when installing spark plugs into cylinderhead spark plug wells. Be sure plugs do not drop into plug wells asground straps may be bent resulting in a change in plug gap, orelectrodes can be damaged.

Always tighten spark plugs to specified torque. Over tightening cancause distortion resulting in a change in spark plug gap or a crackedporcelain insulator.

1. Start spark plug into cylinder head by hand to avoid cross threading.
2. Tighten spark plugs to 27 Nm (20 ft. lbs.) torque.
3. Before installing coil(s), check condition of coil O-ring andreplace as necessary. To aid in coil installation, apply silicone tocoil O-ring.
4. Install ignition coil(s). Refer to Ignition Coil Removal/Installation.