Question about 1998 Ford Expedition

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Shot a spark plug out of the cylinder head - 1998 Ford Expedition

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  • johnny wyatt
    johnny wyatt Aug 25, 2010

    Was it #4? did you try and put it back in? Every once in a while someone on the line doesn't do there job like there suppose too. and I know every once in a while you'll get someone who will over tighten them which will strip the threads. see if it will go back in if not you will have to get a repair kit (healy coil to fix it) or you might have to replace the head

  • james_clampe Aug 26, 2010

    well i'm pulling the head right now but there is a hose that's hard to get off so i have been trying to figure out if i can get a heile coil on it without removing the head. I don't know the firing order on this truck (its not mine) but it is the rear passenger side cylinder. also when i was trying to pull the head it was real stubborn to pull off is that normal?


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Yes you can repair it on the motor but its very tuff cause you really can't see what your doing. firing order doesn't matter cause its coil over plug and the wires just have enough wire to get to the right coil pack. I would try and pull the head. yes sometime they can be hard to get off make sure you have everything unbolted and out of the way. and thats #4 plug it will be very hard on the truck. I still think the plug might not have been tighten. Go to youtube I have a video directions on how to replace sparkplugs 7

Posted on Aug 29, 2010

  • johnny wyatt
    johnny wyatt Aug 29, 2010

    and 8 on a 1999 f250 5.4L might give you and ideal


Of coarse you did, along with thousands of other Ford owners from 1998 to around 2005
There is a tool you can buy to repair that, with the head on the vehicle.
There isn't enough threads in the cylinder head,Ford knows that, and just kept selling them that way for say, six years or more!
They have some other nice features you'll enjoy, if you keep buying a ford product. Enjoy repairing that is.

Posted on Aug 27, 2010

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How do you remove a stuck spark plug in a 2006 saturn vue

The damage might have been done already. If the spark plug was over-torqued when it was installed or replaced while the engine was hot, some of the threads from the cylinder head may have gotten sheared off and stuck to the spark plug. Options are kind of limited. With a cool engine, spray the spark plug with penetrating oil, put the spark plug socket on the plug and tap it (vibration helps the stuff penetrate sometimes), let it sit for half an hour and try removing it again. Try to use the shortest extension you have and try not to use a swivel. You wanna apply as much torque as you can to the plug without snapping off the porcelain insulator so use two hands, one to apply torque and the other to hold the tool straight. When you get it out, check the threads on the plug and the cylinder head carefully. If any metal had crumbled off, you don't want that stuff getting into the cylinder. If it does get in there, you'll have to get creative with a vacuum because that stuff will scar the cylinder wall. If you did shear off some threads, most auto parts places have thread repair kits but you gotta follow the instructions carefully because those tend to be a one-shot deal. If you mess up, you might be talking to a machine shop or junkyard soon after. Good luck.

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I have a 2006 saturn vue 6 cylinder and a plug is stuck. How do you get it out wiyhput breaking it off in the head#?

Don't worry about it breaking up. The base is all metal, not likely to break up. What is of concern is that the spark plug threads in the cylinder head don't get messed up when removing a stuck plug.
Use some liquid wrench or penetrant around the spark plug, and let it sit for about 20 minutes. Then put socket on the plug and wrench it out. Sometimes the upper part of plug, the ceramic top, will break off, but you can still remove the base part. Buy a tube of anti-seize compound, and use it on the threads of new plugs. You will never have a stuck plug again.

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Idles rough cylinders 13 and 5 have spark to the plug but it makes no difference when I unplug them

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How to change spark plugs

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

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Cant find plugs on a 3.7 6 cylinder 2 wheel drive dakota please help

3.7L Engines
Each individual spark plug is located under each ignition coil. Each individual ignition coil must be removed to gain access to each spark plug. Refer to Ignition Coil Removal/Installation. Prior to removing spark plug, spray compressed air around base of ignition coil at cylinder head. This will help prevent foreign material from entering combustion chamber.

  1. Remove spark plug from cylinder head using a quality socket with a rubber or foam insert.
  2. Inspect spark plug condition.
To install:
  1. Start the spark plug into the cylinder head by hand to avoid cross threading.
  2. Before installing coil(s), check condition of coil o-ring and replace as necessary. To aid in coil installation, apply silicone to coil o-ring.
  3. Tighten spark plugs to 27 Nm (20 ft. lbs.) torque.
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How to change spark plugs on 2001 chevy lumina

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 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.


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.

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1 Answer

How to change the spark plugs on peugeot 406 v6 3l coupe is this straight forward like a 4 cylinder car

1. Spark plugs removal

1.1. Front cylinder bank spark plugs removal:
1.1.1. Disconnect the battery from car terminals.
1.1.2. Remove the engine plastic cover.
1.1.3. Disconnect the ignition coils electrical supply cable and all three coils connectors.
1.1.4. Remove all three ignition coils screws.
1.1.5. Remove all three ignition coils out from cylinder head.
1.1.6. Remove all three spark plugs out from cylinder head (straight forward).

1.2. Back cylinder head bank spark plugs removal:
1.2.1. Remove the inlet manifold out from cylinder head.
1.2.2. Disconnect all three ignition coils connectors.
1.2.3. Remove all three ignition coils screws.
1.2.4. Remove all three ignition coils out from cylinder head.
1.2.5. Remove all three spark plugs out from cylinder head (straight forward).

2. Spark plugs installation

2.1. Refit all in reverse order.
2.2. Spark plugs tightening torque = 2,8 +/- 0,3 daN.m
2.3. Ignition coils tightening torque = 0,8 +/- 0,2 daN.m

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When it overheated you may have warped your cylinder head(s) and now coolant got into one or more cylinders. Take out your plugs and crank your engine and take note of any liquid being shot out of any cylinders. If you have a compression gauge, put it in each cylinder and crank the engine until you get the highest reading. Watch the gauge and if you see the pressure dropping, you have a pressure leak probably from a warped head from overheating.

Note: Never remove a spark plug from a hot engine if you have aluminum heads.

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The causes for spark plugs leaving the cylinder head are as follows:
1. The threads in the cylinder head were compromised, as in cross-threading.
2. The spark plug, when replaced, was not tightened down properly (like only 2-3 threads in)
3. A combination of the above.

Whe the plugs are fully seated in the cyl heads, and are at the proper torque, it would be extremely RARE for the plug to be jettisoned by the compression of the pistons. You only have roughly 175-185 PSI compression, this will NOT defeat the retention of the threads. Look at the hole in the head...How may threads are damaged? If it is just the end of the hole, the plugs was not in "all of the way". If ALL of the threads are bad, the plug was inserted improperly, and damaged the threads in the head. Rethreading (a "heli-coil") will correct you condition, if properly done.
Hope this helps.

Sep 30, 2008 | 2003 Toyota Tundra

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