Drive a screwdriver down around the outside of the shield(tube) which will loosen it up and you should be able to wiggle and pull it out. You may break the spark plug off but you'll still be able to get a socket on it for removal.
Spark Plug Heat Shield Removal
im just curious about any long term ill effects on removing those spark plug heat shields on a 3.9 v6. im going to be installing the napa premium wires and just afraid off cooking the boots, thats all. Is it worth removing these things?
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