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Re: Agree with Kurt & Nick
Posted by Erich (more from Erich) on Sat, 21 Apr 2001 12:33:21
In Reply to: Agree with Nick, Kurt, Sat, 21 Apr 2001 09:35:29
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The problem people have with spark plug removal is caused by heat and electrolosis (mixing of dissimilar materials). The main culprit is heat. Aluminum is much more sensitive to heat than steel because it has a much higher thermal-expansion coefficient. Combine this with the very high internal combustion pressures that occur within the cylinder bore and you can see why spark plugs can be a pain. Has anyone tried to remove & install an oxygen sensor?? This will make a spark plug change seem like a walk in the park....because the exhaust manifold gets a LOT HOTTER than a cylinder head and the heat can cause the two items to "weld together".
Regardless of what NGK says, the only SURE WAY to protect your cylinder head threads is anti-seize compound. It is especially designed for this application and will not have any negative effects on your car or plugs.
(I promise!!!!).
Keep the following thing in mind:
1. Apply a minimal amount of the anti-seize compound to the threads of your plug.
2. Do not get the compound on your electrode (it can effect proper sparking). I recommend not applying the compound near the bottom 1/8" of plug thread...this way you know you are safe.
3. Make sure you use a torque wrench (click type). Most plugs (not all but most) use a compression washer which will not seat properly unless torqued properly (usually between 16 - 20 ft/lbs).
Good Luck!!!
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