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Spanky
Samba Member
Joined: June 24, 2005
Posts: 82
Location: Martha's Vineyard MA and Cincinnati OH
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 Posted: Wed Jul 04, 2007 10:15 am Post subject: what size wrench for a spark plug |
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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!! 
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1959 Renault Caravelle
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1979 Vespa Scooters (2), 1981 BMW R65
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76897
Location: Sneaking up behind you
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Towel Rail
Horizontally Opposed
Joined: April 15, 2005
Posts: 4622
Location: SE CR IA US NA PE
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| Posted: Wed Jul 04, 2007 10:32 am Post subject: |
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11/32"?  My Bosch Supers take a 13/16"! 
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Captain Spalding
Samba Member
Joined: February 19, 2005
Posts: 2519
Location: . . . in denial.
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| Posted: Wed Jul 04, 2007 11:19 pm Post subject: |
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| Towel Rail wrote: |
| 11/32"? My Bosch Supers take a 13/16"! |
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
Horizontally Opposed
Joined: April 15, 2005
Posts: 4622
Location: SE CR IA US NA PE
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| Posted: Wed Jul 04, 2007 11:40 pm Post subject: |
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| Captain Spalding wrote: |
| Towel Rail wrote: |
| 11/32"? My Bosch Supers take a 13/16"! |
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"!
_________________
1974 Thing -- under the knife
1967 Beetle -- spring/summer/fall driver
1996 Subaru OBW (EJ22, 5-speed, AWD) -- winter car, 3-seasons "don't feel like biking today" car
049 > 070 > 053 > 009 |
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Spanky
Samba Member
Joined: June 24, 2005
Posts: 82
Location: Martha's Vineyard MA and Cincinnati OH
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| Posted: Thu Jul 05, 2007 5:21 am Post subject: |
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11/32 aint near big enough, right? 
Anybody got a metric size 
Thanks,
Dave
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1959 Renault Caravelle
1973 Citroen Maseratti SM
1974 Chevy Malibu Wagon
1979 Vespa Scooters (2), 1981 BMW R65
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Fun 181
Zu Geil!
Joined: October 20, 2006
Posts: 1003
Location: Connecticut
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| Posted: Thu Jul 05, 2007 6:58 am Post subject: |
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John Muir says to use a 21mm deep socket for spark plugs. 
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dan macmillan
Samba Member
Joined: October 19, 2003
Posts: 3110
Location: Northern Ontario, Canada
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| Posted: Fri Jul 06, 2007 3:36 am Post subject: |
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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
Samba Member
Joined: March 27, 2014
Posts: 44
Location: League City, TX
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| Posted: Thu Feb 02, 2017 6:16 pm Post subject: Re: what size wrench for a spark plug |
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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
Samba Member
Joined: March 13, 2005
Posts: 50336
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| Posted: Fri Feb 03, 2017 12:56 am Post subject: Re: what size wrench for a spark plug |
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| 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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