Spanner size for spark plugs on 416?

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Richard Clements
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Location: Gloucestershire

Re: Spanner size for spark plugs on 416?

Post by Richard Clements » Tue Jan 13, 2009 9:06 pm

Hi there, if you go into the local parts shop they will tell you, I don't know off the top of my head but my wife has a car the same and I changed them recenlty using a spark plug socket and extension bar I will have a look at what size the Spark plug socket was.
1989 827 Si Fastback, Manual, Pulsar Silver Metalic

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richard moss
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Re: Spanner size for spark plugs on 416?

Post by richard moss » Tue Jan 13, 2009 11:48 pm

The spark plugs are 10mm (the size refers to the diameter of the threaded part not the top) and so you need the appropriate sized spark plug socket. It will be called a "10mm spark plug socket".
1990 827 Sterling manual
1990 Jaguar Sovereign 4 Litre on LPG
1969 MGC GT (currently hibernating)

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Re: Spanner size for spark plugs on 416?

Post by GOY189 » Sun Jan 25, 2009 12:56 am

I found a length of rubber tube very useful. Once the plug is loose, you can push this over the spark plug insulator and lift the plug out. IT can also be used to place the new plugs in place and start the thread. Then you can use the plug spanner to tighten the new plugs

hope this helps

Mike Maher

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