I've been trying to replace the spark plugs in my car but there's no way that I can get the old plugs to turn. They seem frozen. I was able to remove just one (1) of them. Despite of more force there is absolutely no movement. Any idea's on how to tackle this?
the quick way: Warm the engine up to operating temperature and try again.
The sticking of the plugs could be caused by copper paste. I tale Molybden powder intead. It is not the copper but the carrier grease taht causes the problems. Another cause is fixing the plugs on the engine when hot or over-torqueing. That will make them get stuck.
Heat up the engine to 40° - 60° use a cooling spray (like used in the electronics business) to cool down the spark plug itself. That may cause it to break loose. As soon as it starts to turn, use WD40 to lubricate and turn the plug back and forth to make the WD40 do its job,
I've been using copper paste for over 30 years and countless sparkplug replacements. I always use copper paste. Never any problems there.
I tried again yesterday. Let the engine warm up, and all plugs came out without damage. I was lucky.
And then again I'd like to use some ceramic anti seize... You can't imagine how much work it is to get a stuck spark plug out.
This is about antiseize from NGK: Sparkplug NGK TB-0630111antisieze.pdf Bottom line is: do not (!) over-tighten.