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Everything on a Toyota vehicle is metric. So it really rubs me the wrong way that a 5/8” spark plug socket is what is recommended. From what I understand 5/8” and 16mm are more or less identical within a fraction of a millimeter. Would not a 16mm spark plug socket just fit better? It makes no sense that oem spark plugs on Toyota would be an imperial measurement unit.
or am I just obsessing on this?
5/8” worked on mine, seems to be a standardized thing despite the rest of the car being metric. Measured with a caliper and it was 5/8” too
Spark plugs use a Standard Plug Socket, whether the Vehicle is Metric or SAE! In this case it's 5/8" Spark Plug Socket. It's not just the size, but the socket is made especially for a Spark Plug!
I've Never Seen a 16mm Spark Plug Socket, but maybe there is!
Spark plugs use a Standard Plug Socket, whether the Vehicle is Metric or SAE! In this case it's 5/8" Spark Plug Socket. It's not just the size, but the socket is made especially for a Spark Plug!
I've Never Seen a 16mm Spark Plug Socket, but maybe there is!
they do indeed make 16mm spark plug sockets. 5/8” = 15.879mm so .121 mm off. However is the spark plug exactly 15.879mm? Either way either one will work.
I got thinking about this after watching a wrench test video where they said that 16mm and 5/8” are interchangeable. I forget if it was torque test channel or project farm.
they do indeed make 16mm spark plug sockets. 5/8” = 15.879mm so .121 mm off. However is the spark plug exactly 15.879mm? Either way either one will work.
I got thinking about this after watching a wrench test video where they said that 16mm and 5/8” are interchangeable. I forget if it was torque test channel or project farm.
Thank You,
That's Very Interesting, learned something New Today! A Metric Plug Socket for a Metric vehicle.
Thank You,
That's Very Interesting, learned something New Today! A Metric Plug Socket for a Metric vehicle.
you got it!
I mean the 5/8” might be a better fit, I’m going to have to verify this when I pull my engine out and get to the spark plugs or I may wait till I get the salvage engine I’m swapping out for and replace the spark plugs in there with new ones. If the spark plug measures 15.87-15.9 mm then he discrepancy is negligible. Ultimately either will work but I have the type of thinking that’s telling me one should work better than the other and why would Toyota spec a non metric component in a vehicle where EVERYTHING is literally metric? It. Just. Makes. no. sense.
you got it!
I mean the 5/8” might be a better fit, I’m going to have to verify this when I pull my engine out and get to the spark plugs or I may wait till I get the salvage engine I’m swapping out for and replace the spark plugs in there with new ones. If the spark plug measures 15.87-15.9 mm then he discrepancy is negligible. Ultimately either will work but I have the type of thinking that’s telling me one should work better than the other and why would Toyota spec a non metric component in a vehicle where EVERYTHING is literally metric? It. Just. Makes. no. sense.
The difference is .004 of an inch, 5/8" is .625 of an inch and 16mm is .6288 of an inch.
it's Not the difference in size, which is almost negligible, it's how the socket is made.
A "Spark Plug" socket is made especially for a spark plug, it is made to protect the porcelain insulator when removing and installing the spark plug and other important manufacturing details too.
All Spark plug manufacturers have been making 5/8" spark plugs for many Years.
It's kinda like tires,
Tire Diameter is in Inches, eventhough they are used on Import Vehicles! It's just one of those Things!
The difference is .004 of an inch, 5/8" is .625 of an inch and 16mm is .6288 of an inch.
it's Not the difference in size, which is almost negligible, it's how the socket is made.
A "Spark Plug" socket is made especially for a spark plug, it is made to protect the porcelain insulator when removing and installing the spark plug and other important manufacturing details too.
All Spark plug manufacturers have been making 5/8" spark plugs for many Years.
It's kinda like tires,
Tire Diameter is in Inches, eventhough they are used on Import Vehicles! It's just one of those Things!
I totally get that but I bet in Japan and Europe tires are sold in metric specs. They definitely make specialty spark plug sockets in 16mm this one looks pretty nice seeing it has a swivel joint and is magnetic
[QUOTE=Rx330fnboi;11367743]I totally get tw2hat but I bet in Japan and Europe tires are sold in metric specs. They definitely make specialty spark plug sockets in 16mm this one looks pretty nice seeing it has a swivel joint and is magnetic /QUOTE]
Yep, something for Everybody!
it's Market Driven, if You want it, Somebody Makes it and Sells it!
I bet someone makes 16mm Spark plugs!
Maybe outside of the US, the plugs are listed as 16mm rather than 5/8"?
Correct spark plug socket size.
