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Redundant Spark Plug Sockets

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BlakeTheCarGuy

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Joined
Oct 10, 2018
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Roanoke Virginia
5/8 is the size I find myself needing the most. I’ve never seen a spark plug socket just simply labeled 16mm. I do have a cheap no name that says 5/8 (16mm) on it exactly like that. I’ve got about every size spark plug socket though lol. Subaru takes 14mm most of the time so of course I use that a lot too working on Subaru. Then my small engines have 18mm and 3/4. My truck and Beetle are 13/16. I needed a 9/16 on a Ford once. Everything else I own is 5/8. So yeah I’ve got them all lol 😂. I’ve seen 7/8 too but only use I know of for that is super old stuff. I’d always grab SAE first if I had both.
 

finn

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Mar 27, 2005
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The UP, God's country
I love those, too. Time was, that was what you had, because the spark plugs all were that size. Well, unless you worked on some really, really old cars with even bigger spark plug hex sizes. That changed, though, over time, so you added the new sizes as needed. But, you didn't really change spark plugs so much anymore. Heck, I can't even see the plugs in either of my cars. I know where they are, but they're not going to need to be changed for years.

On the other hand, other equipment with spark plugs need more frequent service. Some have 13/16" plugs. Some have 5/8" or 16mm plugs. I haven't encountered many other sizes since I'm not working in a shop any longer. I still have the sockets, though, but almost no duplicates.
The plugs in my truck are 18 years old. I contrmplated ordering 16 new plugs for it a few days ago, but couldn decide if I should order the $1.73/ plug copper- nickel like the Oem Mopar plugs, and then have to change them in another 18 years when I’m 89, or spring for the $3.68 / plug platinum plugs that last three times as long and have to change them when I’m 125.

I decided to forgo the iridium plugs that last four times as long, since my financial planner guy didn’t run my finances out till I’m 143. He said it’s not probable that I’ll still be functional by then.
 

j3rf

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Apr 26, 2018
Messages
488
Location
Ohio
5/8 is 15.875mm.
(.6250 vs .6299)
They are not the same, but typically close enough for use on a fastener head.

Yes, im being THAT guy...:lol:
Exactly why I prefer my 14/16mm spark plug sockets.
What uses 14mm?
16mm?
Subaru, Toyota/Lexus. Only thing that matters in my world.
Fortunately all four vehicles of ours are 6pt.

If you're ever in the market the Koken 16mm and 14mm spring clip spark plug sockets (250mm length) are incredible:

Koken 3:8 Extension 16mm Spark Plug Socket 250mm 3300C.250-16.pngKoken 3:8 Extension 14mm Spark Plug Socket 250mm 3300C.250-14.JPG
Unfortuntely too long for Subarus! :ROFLMAO:
5/8 is the size I find myself needing the most. I’ve never seen a spark plug socket just simply labeled 16mm.
16mm only :ROFLMAO:
 

DAustin

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Jul 30, 2021
Messages
5,167
You do realize this is the same guy who recently posted venturing out into shark infested waters in a rickety homemade boat, bow and arrow in hand and bringing back Leopard sharks for the dining table, right?
You got the wrong guy. No sharks in Lake Eire. It's still salt and shark free. :)
 

cgrutt

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Joined
Mar 4, 2016
Messages
8,364
You got the wrong guy. No sharks in Lake Eire. It's still salt and shark free. :)

Don't think so....

My First Fishing Boat

In the mid 1970s, I lived in a rental house overlooking the estuary area of Morro Bay, CA. I also fished a lot here and there on inshore waters. One Spring day, at low tide, I noticed that there were hundreds of sharks out in that estuary. So, the next weekend, I put together this 8' jon boat, made of a sheet of 1/4" plywood and a couple of 2x12s. I fiber glassed the joints and painted it green with a gallon of green paint I had around the garage. Then, I started hunting sharks with a bow and arrow as the tide was changing. Frankly, I was meat fishing, since my income was very, very spotty at the time.

A few years later, when I had started working as a freelance writer, one of the first articles I sold was the one below, published in Western Outdoors. Soon after that, I started seeing other boats out on the water, doing the same thing. I did a few more outdoor articles, but soon moved on to writing other types of things that paid a little better and had a larger market. An interesting period of my life, and the only boat I ever built. Not much of a boat, but it worked.

Shark2.jpg
 

Komet

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Apr 27, 2022
Messages
287
Location
WA
Hey if I can get that .005" tighter fit, I'm going to go for it. Most of the time I grab SAE and metric and I test out whatever is going to have the best fit, but that's probably a symptom of late 80's early 90's GM where you don't really know which they were using for what.
 

Pinemarten

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Joined
Jan 23, 2023
Messages
333
Location
Washington
A person needs spark plug sockets at home, and in their vehicle toolbox. Then they should have the correct sockets for the spark plug that needs to be changed or cleaned. Oh........don't forget the oddball spark plug you might come upon in your travels. A friends weed whacker, chainsaw, etc.

Speaking of chainsaws...........do screches count as spark plug sockets?
 

ecotec

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Joined
Oct 5, 2010
Messages
5,470
I'm fairly certain most of mine are SAE, aside from a 14mm 12pt.
Same. Mine are all SAE except for 14mm and 18mm.

8 out of 10 are SAE. I haven’t needed a 16mm one yet.

I just noticed my 3/4” one is made by Gorilla. I have no idea where it came from…
 
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JradM

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Sep 4, 2019
Messages
1,821
Location
Alberta
This is the only reason I have redundant spark plug sockets in my box.

I used to drive a Ford Bronco in the 80s/90s so I had the 5/8s.

But since 1998 I've only driven Toyotas. (two 1st gen Tacomas and a Prius). So now I only use 16mm and 14mm.
I was going to say something similar. There's no redundancy - use your 5/8" on SAE vehicles, your 16mm on the metric ones. We've got a civilization to run, don't be a ******.
 
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Garcky

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Twin Cities Metro Area, Minnesota
Regular spark plug sockets are generally useless these days except for lawnmowers.

This is where it's at.
1684262060344.png
Incredibly useful.
A wobble extension will take care of that. Sometimes, though, you need a real wobble joint on an extension. Or even two extensions with a wobble joint between them and another one at the socket end. A guy does what's needful.
How about : "getter"
That'll get in there, probably. Still, there are some spark plugs on some cars that are hella hard to remove and replace. I was shocked on my 1993 Ford Ranger which had two plugs per cylinder. One on each side of the head. 8 plugs on a 4-banger engine. And they fired at slightly different times, to boot. Emissions, I suppose. The ones on the left side of the head were almost impossible to get at, without removing the exhaust manifold, and everyone knows the perils of doing that on an older car.

Anyhow, I never changed them. When I got the pickup it had 247,000 miles on it and was running OK, so I just ignored the plugs and drove on. I had it for three years and maybe put 6000 miles on it in that time. I sold it, still running fine, with the same plugs in there. Who knows when the last time the plugs on the left side of the head were changed. Maybe never.

Now, there are other engines with two plugs per cylinder, but they're on high-performance engines, not a 2.3 liter engine in a compact pickup truck. 🤣
 
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Garcky

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Twin Cities Metro Area, Minnesota
A wobble extension will take care of that. Sometimes, though, you need a real wobble joint on an extension. Or even two extensions with a wobble joint between them and another one at the socket end. A guy does what's needful.

That'll get in there, probably. Except that assembly is pretty darned long and you can't take it apart. Still, there are some spark plugs on some cars that are hella hard to remove and replace. I was shocked on my 1993 Ford Ranger which had two plugs per cylinder. One on each side of the head. 8 plugs on a 4-banger engine. And they fired at slightly different times, to boot. Emissions, I suppose. The ones on the left side of the head were almost impossible to get at, without removing the exhaust manifold, and everyone knows the perils of doing that on an older car.

Anyhow, I never changed them. When I got the pickup it had 247,000 miles on it and was running OK, so I just ignored the plugs and drove on. I had it for three years and maybe put 6000 miles on it in that time. I sold it, still running fine, with the same plugs in there. Who knows when the last time the plugs on the left side of the head were changed. Maybe never.

Now, there are other engines with two plugs per cylinder, but they're on high-performance engines, not a 2.3 liter engine in a compact pickup truck. 🤣
 

Bubba Fett

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Jun 11, 2018
Messages
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Location
Eastern NC
A wobble extension will take care of that. Sometimes, though, you need a real wobble joint on an extension. Or even two extensions with a wobble joint between them and another one at the socket end. A guy does what's needful.

That'll get in there, probably. Still, there are some spark plugs on some cars that are hella hard to remove and replace. I was shocked on my 1993 Ford Ranger which had two plugs per cylinder. One on each side of the head. 8 plugs on a 4-banger engine. And they fired at slightly different times, to boot. Emissions, I suppose. The ones on the left side of the head were almost impossible to get at, without removing the exhaust manifold, and everyone knows the perils of doing that on an older car.

Anyhow, I never changed them. When I got the pickup it had 247,000 miles on it and was running OK, so I just ignored the plugs and drove on. I had it for three years and maybe put 6000 miles on it in that time. I sold it, still running fine, with the same plugs in there. Who knows when the last time the plugs on the left side of the head were changed. Maybe never.

Now, there are other engines with two plugs per cylinder, but they're on high-performance engines, not a 2.3 liter engine in a compact pickup truck. 🤣
Extensions can come off the socket, which is problematic with ignition coils, since the socket comes off and is nearly impossible to remove from the well.

This eliminates that problem, and its magnetic (at least mine is) so it holds the socket. Plus, it's knurled, so I can use it to get the socket started by hand, and then use a ratchet. Well worth the money.
 
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Garcky

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Twin Cities Metro Area, Minnesota
Extensions can come off the socket, which is problematic with ignition coils, since the socket comes off and is nearly impossible to remove from the well.

This eliminates that problem, and its magnetic (at least mine is) so it holds the socket. Plus, it's knurled, so I can use it to get the socket started by hand, and then use a ratchet. Well worth the money.
Right. I'm to old to have worked on coil-on-plug engines. But, generally, they're a little easier to get too than some cars' plugs are. I'm sure my cars have individual coils, but I'm not going to be working on them. Warranty.
 

JradM

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Sep 4, 2019
Messages
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Location
Alberta
Extensions can come off the socket, which is problematic with ignition coils, since the socket comes off and is nearly impossible to remove from the well.

This eliminates that problem, and its magnetic (at least mine is) so it holds the socket. Plus, it's knurled, so I can use it to get the socket started by hand, and then use a ratchet. Well worth the money.
Having experienced that once, I now use a locking extension on the socket when they're buried deep. Not saying your solution isn't even more elegant, but I bet that socket wasn't cheap.
 

ecotec

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Oct 5, 2010
Messages
5,470
Having experienced that once, I now use a locking extension on the socket when they're buried deep. Not saying your solution isn't even more elegant, but I bet that socket wasn't cheap.
I looked it up. It wasn’t that much more expensive than the Gearwrench that I have. Mine are much shorter, and are not magnetic.
 

DAustin

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Joined
Jul 30, 2021
Messages
5,167
I've got one of those Snap-on 6" long, 5/8" spark plug sockets. I bought it at a swap meet it looked un-used. I've had it for years, it still looks un-used. But I'm sure one of these days I'll really need it. Once in a while I'll pull it out of the toolbox and using my Crocodile Dundee voice I say "That's not a Spark Plug Socket, this is a Spark Plug Socket.
 

kbeefy

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Joined
Sep 14, 2013
Messages
3,458
Location
Harington, Eastern Washington
I have the Gearwrench 4 piece set, it's my go to for spark plugs as long as their 5/8.
And they are magnetic.


Right. I'm to old to have worked on coil-on-plug engines. But, generally, they're a little easier to get too than some cars' plugs are.

On inline 4 cyl, yes. On transverse v-6 engines, they can be challenging.
 

Wrench97

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Jun 23, 2018
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Southeastern Pa
Right. I'm to old to have worked on coil-on-plug engines. But, generally, they're a little easier to get too than some cars' plugs are. I'm sure my cars have individual coils, but I'm not going to be working on them. Warranty.
Not counting the ones you have to pull the upper intake manifold off to get at them............................
Nothing like a 250/292 chevy pick up to change plugs in ;)
 

DAustin

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I had an 83 Dodge pick-up with a Slant-6. It was ridiculously easy to work on. I guess I've been lucky most of the cars I've owned have had plugs that were easy to get to.
 

Hannahranga

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Joined
Mar 8, 2023
Messages
217
Could be worse, at least you have some use for them. Only having owned diesels till very recently the small collection I've acquired from various tool kits have just been gathering dust. That koken spark plug socket looks very tempting tho.
 

minke

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Joined
Dec 1, 2018
Messages
478
Location
fly over country
I can't find where to sign up for GJ therapy. My only vehicle now has a Ford V8 with 16 plugs. How many sockets do I need? Will I ever be OK?
 

Bubba Fett

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Jun 11, 2018
Messages
1,517
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Eastern NC
Having experienced that once, I now use a locking extension on the socket when they're buried deep. Not saying your solution isn't even more elegant, but I bet that socket wasn't cheap.
I think it was around $15. Mine was Neiko, I think, but pretty much identical. Locking extensions are probably more versatile, though.
 

Madjik Man

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Joined
Dec 3, 2015
Messages
1,534
Extensions can come off the socket, which is problematic with ignition coils, since the socket comes off and is nearly impossible to remove from the well.

This eliminates that problem, and its magnetic (at least mine is) so it holds the socket. Plus, it's knurled, so I can use it to get the socket started by hand, and then use a ratchet. Well worth the money.

Prior to the Koken extended spark plug sockets I now use I’d always use gaffers tape to secure the socket to the extension.
 

Houdini5150

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Joined
Mar 17, 2022
Messages
570
Location
Arizona
Where was this post 2 weeks ago when I put in new plugs in my Rogue.

I had a cheapo spark plug socket that the darn plug would stick to the plug and when I would pull on it, the extension would come off when doing my gf's car. So I thought I could use a deep socket... I realized I had 1/2 inch deep sockets and had to go pull out my 1/2 inch extensions and ratchet since my plugs have those 10mm bolts holding them in. Then I tried using a magnet pick up tool... And I couldn't get magnet to release plug or tighten plug. But I got it figured out. Took me longer than I wanted. So yeah again I need to prep and get a good set of sockets or some vacuum hose. But I don't do a whole lot of spark plugs anyways.
 

Wrench97

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Jun 23, 2018
Messages
12,158
Location
Southeastern Pa
I can't find where to sign up for GJ therapy. My only vehicle now has a Ford V8 with 16 plugs. How many sockets do I need? Will I ever be OK?
Be careful pulling the wires off the bottom ones, only available from Ford, you buy them individually and half the time the dealer around here only has 2 in stock......................................
 
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