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what size wrench for a spark plug
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Spanky
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PostPosted: Wed Jul 04, 2007 10:15 am    Post subject: what size wrench for a spark plug Reply with quote

Suddenly I cannot get a socket to remove a spark plug. Never had this problem before. Don't remember what size I used before.

Please tell me. It's driving me crazy!! Crying or Very sad Crying or Very sad
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Glenn Premium Member
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PostPosted: Wed Jul 04, 2007 10:16 am    Post subject: Reply with quote

11/32"
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Towel Rail
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PostPosted: Wed Jul 04, 2007 10:32 am    Post subject: Reply with quote

11/32"? Shocked My Bosch Supers take a 13/16"! Very Happy
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Captain Spalding
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PostPosted: Wed Jul 04, 2007 11:19 pm    Post subject: Reply with quote

Towel Rail wrote:
11/32"? Shocked My Bosch Supers take a 13/16"! Very Happy

I think some heads (with larger ports) take a smaller plug. I know my NGKs are smaller than the Bosch Supers.
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Towel Rail
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PostPosted: Wed Jul 04, 2007 11:40 pm    Post subject: Reply with quote

Captain Spalding wrote:
Towel Rail wrote:
11/32"? Shocked My Bosch Supers take a 13/16"! Very Happy

I think some heads (with larger ports) take a smaller plug. I know my NGKs are smaller than the Bosch Supers.


True. 11/32" is dinky though -- about 1/3"!
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Spanky
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PostPosted: Thu Jul 05, 2007 5:21 am    Post subject: Reply with quote

11/32 aint near big enough, right? Wink
Anybody got a metric size Question
Thanks,
Dave
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Fun 181
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PostPosted: Thu Jul 05, 2007 6:58 am    Post subject: Reply with quote

John Muir says to use a 21mm deep socket for spark plugs. Laughing
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dan macmillan
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PostPosted: Fri Jul 06, 2007 3:36 am    Post subject: Reply with quote

For the longest time plugs have only come in 2 sizes, 13/16 or 21mm and 5/8 or 16mm. Yes I know that long ago they had them in about 1 inch and some oddball ones are 18mm {kawasaki motorcycle} and lately Ford used 9/16 but the vast majority of all engines use the first 2 sizes I mentioned.

All VWs used 13/16...21mm from the factory.
Check to see if a protion of your plug wire stayed stuck on the plug. Do not use a standard deep socket. Get a proper plug socket. It has a rubber liner to help protect the plug from cracking.
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Lola Racing
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PostPosted: Thu Feb 02, 2017 6:16 pm    Post subject: Re: what size wrench for a spark plug Reply with quote

I have a 70 1600cc bug and the 13/16 socket seem too big what other size should I use? first time changing on this bug.
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Wildthings
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PostPosted: Fri Feb 03, 2017 12:56 am    Post subject: Re: what size wrench for a spark plug Reply with quote

Lola Racing wrote:
I have a 70 1600cc bug and the 13/16 socket seem too big what other size should I use? first time changing on this bug.


Some 14mm plugs for small engines take a 3/4" (19mm) wrench.
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