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Changing spark plugs - best to jack car up - and replace from under the vehicle, better visibilty in a garage, where sunlight does not come through top. Utilize a flash light or other lighting from bottom of vehicle. Replace plugs one at a time. Check your plug gap, even if they are pre-set, being careful not to bang them any during installation. Gap setting should be under specifications in owner's manual, on the "white" vehicle emissions sticker under the hood, or ask your auto parts to look up gap. lightly lube plugs groves,and clear out plug holes with lubed towel to pick up any foreign matter in plug port prior to installing ,gently put them in one at a time, being careful not to force them in or cross thread them. You may need a swivel attachment to your rachet. Make sure plug wires snap on tight. It is much easier to access the back two plugs on the driver's side through the flexible wheel well. You may have to jack the engine up slightly to get the middle one out as it sits directly behind the steering shaft.

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โˆ™ 2015-07-15 20:51:39
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Q: How do you change spark plugs on a 1999 Chevy Blazer?
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