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If you look at the top front of the engine you'll see a dog bone shaped motor mount. Most parts stores will rent you tool to help change those plugs. You take that motor mount out, put the tool in it's place and start tightening. It's a threaded tool and as you tighten it it will rock the engine forward allowing you access to the rear 3 plugs.

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14y ago
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Q: How do you change back 3 spark plugs on a 1993 Pontiac grand prix?
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