How to change spark plugs.
The car has 140000 miles on it on original plugs. They are very tight and I'm
afraid I might break them or strip the threads with too much pressure. Can I
spray something in the well to loosen them? Thanks
warm the automobile right up, and use a penetrating oil on them
When penetrating oil fails I have used a little diesel fuel and let it sit overnight, the next morning out they come.
Do NOT try to remove the spark plugs from a warm engine. Do as tennisshoes said and soak with diesel fuel or similar. A 50/50 mixture of acetone and ATF is said to work great.
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