Sprint Plugs

[The Old One]

What size socket for the sprint plugs please.

Cheers

Tony

[Marsu]

The hex on the plug suits a 16mm or 5/8" AF socket.

Use a spark plug socket, rather than an ordinary socket, as the rubber fitting inside grips the plug and enables you to pull it up the tube.

[Bobbieslandy]

The plug socket i use has 10mm stamped on it but i believe it's 16mm if you want to use a long reach socket instead.

Sorry Marsu,i was making dinner half way through writing the post!

Rob.

[The Old One]

Is It A Standard Plug Size Or Smaller as my normal
socket is too big?

Cheers

Tony

[Marsu]

It requires the smaller of the two plug sockets I have.

[Bobbieslandy]

I've got a 150 piece halfords socket set and it's the smaller one that's in there. The other larger one gets used on the lawnmower. If it's got 10mm stamped on it then it's the right one.

[The Old One]

Thanks All

Tony

[Beans]

You indeed need a 16mm AF socket with an outside diameter of approximately 22,6mm, otherwise it won’t fit inside the sparkplug tube.

I have been using a Mercedes tool for this (Gedore Nº58), fits perfectly.



And I could get it cheap of course [:D]

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[Marsu]

Good point. I bought a cheap T handle plug spanner and it doesn't fit in the tube.

Both of my other sockets do though: a Repco 3/8" and Sidchrome 1/2" drive.

[Workshop Help]

On any engine with 'buried' spark plugs, I recommend the removal of the rubber insert from the spark plug socket. Too often the socket has detached itself from the ratchet extention leaving the plug & socket down in the hole and a genuine pain in the kazoo to fish out.

My remedy to remove the rubber insert from the socket, then loosen the spark plug. Remove the socket, ratchet, and extention. With a length of hose that fits snugly over the end of the spark plug by pressing down on it, unscrew the spark plug and pull it out. Use this same method to initially screw the spark plug into the head, then final tighten it with the ratchet, extention, and socket.

This way a fishing expedition is always avoided. Our 1997 Ford F150 pickup is very difficult to change the spark plugs and the hose trick is a true blessing.

Mildred Hargis

[Cobber]

Better still Mildred I have a special socket extension that has a locking mechanism that only releases the socket when the release collar is pulled back, so there is no problem with the rubber plug retaining boots.

80'Triumph TR7, , 73'Land Rover (Ford 351. V8),
'89 Ford Fairlane
85'Alfa 90, 69'Ford F250.
76' Ford F100