Re: How do I change the spark plugs in a 2000 4runner
It's not as hard as it looks. First let the engine get cold, overnight is ideal. You don't want to remove the plugs from a hot aluminum head, and you won't burn your fingers. On the passenger side you have to take off the air intake tube, and then remove the 3 coils from the top of the plugs. The boots will be stuck on tight but with some persuasion and wiggling they'll come off. Don't pull on the wires, you might pull them out. After you remove the boots the plugs will be found down the bottom of the holes. The driver side is easier, except for the back one. When you put the new ones in start them by hand first, making sure they're not cross threaded. I usually put a piece of rubber tubing on the top and use that to start the threads. Antisieze can be used, sparingly, if you want.
As for plugs I would recommend only NGK or Denso, stay away from the fancy platinum or multi electrode ones. You might find one bank has NGK and one has Denso, that engine comes from the factory like that. No one has ever given me a definite answer as to why, but I just replaced mine with all NGKs.
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