This seemingly-impolite question can defuse tense situations in the shop or auto parts store.

Removing valves from a cylinder head should be done carefully if you have a notion to reuse the valves, springs, collars, and keepers. A spring compressor is the right tool for the job.
That said, in my salvage yard days, I learned a trick I still use today if I’m stripping a head for scrap. It’s the fastest method in the world, hands down. I’m not gonna say I’ve never pulled this trick on a customer car, but I will say I don’t use it often nowadays.
If you’re quick and you’re not worried about retaining parts, you can strip down a four-valve four-cylinder head in under a minute. Watch your hands and peepers!
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