Spark Plug Replacement: Toyota / Lexus 3.0L V6

Xacilud 2017-10-10

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Heres how to replace the spark plugs on a Toyota with the 3.0L V6 1MZ-FE engine. The procedure is the same for the Solara, Camry, Avalon, Lexus ES300 and similar to Toyota Sienna, Highlander and Lexus RX300.\r
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These older engines use a metal intake plenum that does not need to be removed to access the rear spark plugs, unlike the newer 3.3L and 3.5L Toyota/Lexus V6 engines.\r
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You will need a few extensions, wobbly sockets, a spark plug socket and a 3/8 ratchet to remove the plugs, especially along the rear bank. Use anti-seize on the threads to prevent them from seizing in the engine. Die-electric grease is also great for where the spark plug makes cont with the ignition coil.\r
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Some models of 1MZ-FE engines come with six coil packs, while others have 3 coil packs in front and 3 wires running to the rear spark plugs (waste spark ignition). For waste spark ignition, use dual electrode platinum plugs to prolong electrode wear, and do not gap new plugs.\r
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Changing the spark plugs is recommended at 8 years or 192,000km. It will help smoothen out a rough idle and give you slightly better fuel economy. The color of the old spark plug can tell a lot about the health of your engine.

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