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Author Topic: Spark plugs  (Read 1456 times)

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jacko

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Spark plugs
« on: 12 September 2021, 14:10:03 »

What is the manufacturers torque settings
For spark plugs for 2.2 year 2002
Sorry to be asking all these questions but I’m learning. :y
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johnnydog

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Re: Spark plugs
« Reply #1 on: 12 September 2021, 14:44:35 »

After the thread starts, turn them by hand (using fingers with a piece of hose if deep in the head which also reduces any chance of cross threading) until the sealing washer contacts, then a further 1/4 turn with the spark plug spanner or socket. They don't need to to be particularly tight, especially in an alloy head.
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2002 3.2 Elite saloon, 2003 3.2 Elite saloon & estate

Andy B

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Re: Spark plugs
« Reply #2 on: 12 September 2021, 20:15:41 »

What Johnny says .... I was always taught that flat seated plugs that used a crush washer was a quarter turn after you'd tightened by hand & taper seated plugs was about an eighth of  turn.
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Nick W

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Re: Spark plugs
« Reply #3 on: 12 September 2021, 20:23:50 »

What Johnny says .... I was always taught that flat seated plugs that used a crush washer was a quarter turn after you'd tightened by hand & taper seated plugs was about an eighth of  turn.


NGK put that on their boxes...
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Andy B

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Re: Spark plugs
« Reply #4 on: 12 September 2021, 20:48:15 »

What Johnny says .... I was always taught that flat seated plugs that used a crush washer was a quarter turn after you'd tightened by hand & taper seated plugs was about an eighth of  turn.


NGK put that on their boxes...

Do they ..... I don't read instructions  ::)
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iansoutham

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Re: Spark plugs
« Reply #5 on: 13 September 2021, 13:11:24 »

Was always taught to do spark plugs up to 25nm so that is what I do. Small bit of conductive grease  on the end threads only to help prevent them seizing and leave them until service time
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johnnydog

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Re: Spark plugs
« Reply #6 on: 13 September 2021, 14:08:47 »

Dispite the given tightening torque, or 1/4 or 1/8th turns, most competant (home) mechanics are able to assess when they are correctly tightened just by feel. This applies to a lot of fastenings on any car, although certain engine components should and have to be be tightened using a torque wrench to the book figures.
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