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Spark Plug - Replace 200 1986

Work the plugs tight and loose. Until you can work the plugs out. What may have happened is the carbon has built up on the end of the plug causing it to bind. You will have to work this carbon loose as I said tighten and loosen. Take your time use lots of penatrating oil over the course of a few days if needed. I would do this with the head cold. Steel does not expand as fast as aluminum if you have the same amount of each material. The plugs are steel that expand slower than aluminum, but the plugs are a small volume and they heat up much faster which will make them tighter.

Good Luck

Brian
--
86 240GL, 86 740GLE & others






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