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Old 08-04-2019, 11:22 AM   #1
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Changing out a plug in 2007 Yaris sedan

Getting misfires on cylinder 1( started a thread on that). Wanted to look at plug . Here’s some pics and tips.
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Old 08-04-2019, 11:32 AM   #2
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Thexton 492 spark plug starter . Old plug boot or rubber hose works too. If plug is cross threaded hose will slip
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Old 08-04-2019, 11:35 AM   #3
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Plug threaded in
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Old 08-04-2019, 11:38 AM   #4
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I then bottom it with extension /spark plug socket. I have a 1/4 adapter for 1/4 torque wrench. I spin up and down to make sure plug moves freely and no cross thread. It will feel gritty because of carbon deposits on threads in spark plug hole.
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Old 08-04-2019, 11:53 AM   #5
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Torque spec is 13 lb ft or 156 inch lbs. I set wrench to 170. I’d rather err slightly tighter than looser. 1/2 turn seated plug gaskets. I actually loosened again and spun plug up and down to again checking for cross thread.. Torqued again this time 1/4 turn til click because gasket on plug was crushed. If the plugs been in a awhile sometimes a 1/8 turn will click.
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Old 08-04-2019, 11:57 AM   #6
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Super lube dielectric grease in coil . A dab put in top of boot.
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Old 08-04-2019, 12:01 PM   #7
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Torquing coil 10mm bolt to 80 inch lbs.
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Old 08-04-2019, 12:04 PM   #8
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Torquing cover 10mm bolts to 80 inch lbs
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Old 08-04-2019, 12:20 PM   #9
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And if you loose the insert washer on top of cover a 7/8 washer fits
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