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Old 07-08-2019, 09:49 PM   #1 (permalink)
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Default What size of socket to use for spark plug replacement?

Does anyone know what size socket will work to remove and replace the spark plugs? I've got a socket that fits the plugs and figured that would work, but it's too fat to fit down the hole.

I had everything ready to go today before I put things back together after my A/C crazy parts replacing epic, but unfortunately it didn't work so I had to put everything back together so I can drive the car tomorrow. So a project for another day. But if someone can tell me the proper size socket that will work, I'd appreciate it
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Old 07-08-2019, 10:02 PM   #2 (permalink)
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Think it's 5/8
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Old 07-08-2019, 10:04 PM   #3 (permalink)
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And 13/16 th are the two,,but 5/8 th is the one am leaning too,
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Old 07-09-2019, 10:41 PM   #4 (permalink)
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yes 5/8" fits the plug, that's what I used, but the socket is too wide to go down the hole to get to the plug. Is there some kind of slender socket that people use? Didn't think this was a difficult question! A regular spark plug socket will not fit!
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Old 07-09-2019, 11:44 PM   #5 (permalink)
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They make a 14 MM spark plug socket, which is a 5/8 socket thin wall. .
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Old 07-10-2019, 08:16 PM   #6 (permalink)
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it's actually a 3/8" socket that I used... fits the plug... but not when it's installed in the engine. I will look for the thin wall. Didn't expect to have this issue
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Old 07-10-2019, 08:48 PM   #7 (permalink)
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It is a 3/8" drive, not a 3/8" socket for the plugs. Got a Walmart, Lowes or Home Depot close by, they have it at a reasonable price.?
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Use: 438,000 mi. @ 58.2 LMPG.



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Old 07-10-2019, 10:50 PM   #8 (permalink)
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no, i used a 3/8" socket (on a 3/8" drive wrench). Fits the plug, wont go down the hole. The outside diameter of a standard sparkplug socket is too wide. I see there's a 20mm diameter socket available on amazon for cheap.
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Old 07-11-2019, 12:41 PM   #9 (permalink)
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Sigh. Just go get a 3/8 drive, 5/8 spark plug socket.

https://www.oreillyauto.com/detail/b...socket+&pos=30

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Old 07-11-2019, 05:08 PM   #10 (permalink)
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Quote:
Originally Posted by Rainsux View Post
Sigh. Just go get a 3/8 drive, 5/16 spark plug socket.

Sam
I really want some of those 5/16" spark plugs. They must lower the car's weight several ounces. I'm going to try to pick some up while at the HybridFest in Dayton

Seriously, there are two common plug socket sizes, 5/8" and 13/16" . The Insight uses the 5/8", smallest of the two. I've never seen either socket with anything but 3/8" drive. A common socket, 20mm or otherwise, won't work because they aren't deep enough. Plug sockets are different from common deep sockets in that they have a foam rubber boot up inside the socket to grip the ceramic of the plug and therefore lift the plug out of the deep plug hole in the head. Too much information maybe. Like Sam says, just go any auto store and buy a 5/8" plug socket.

The link was right.

Oh wait. I now see that it is a Gen2. Probably still a 5/8, but best look in the owner's manual and be sure. Must be a slow news day.
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Last edited by jime; 07-11-2019 at 05:38 PM. Reason: addition
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