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Stupid Question of the day: How do I gap spark plugs?
Posted 17 August 2003 - 03:03 PM
Posted 17 August 2003 - 03:07 PM
Posted 17 August 2003 - 04:47 PM
The curved part is fairly sturdy because it is meant to be bent to set the gap.
The body of the plug is rather fragile and should be handled carefully. A drop of 2 or 3 feet can crack them.
Needle nose should be ok, but don't scratch the electrodes on the sides. That can create hotspots and shorten the life of the plug. I like to use a metal fingernail file to smooth off any rough spots in the actual gap.
I use a graduated, round gapping tool to check and also set the gap. Cost about a dollar at RetardAuto or AutoDrone.
Stick it in the gap and gently wiggle it to get the correct gap. If the gap is too large a very gentle tap should close it enough to start over.
BTW, FERTHER doesn't like anything but NGKs.
Even though most plugs come pre-gapped from the factory you should always check them.
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