Name that tool please, passenger head temp sensor plug
 

Hi
My 1969 Chevy 350 engine was rebuilt with newer heads. Head casting number 10147898 from 1995 crate engine. I am looking to add a temperature sensor on the passenger side, so I need to remove this plug. Can you tell me what tool to get? Some sort of a square drive tool. I tried inserting a socket wrench 1/4 drive and it is too little, 3/8 is too big. Is this something metric?

Re: Name that tool please, passenger head temp sensor plug
 

3/8'' ratchet extension hooked to a 1/2'' breaker bar. Sometimes a little bit of heat with it

Re: Name that tool please, passenger head temp sensor plug
 

Snap-On P/N PPM410A 5/16" square drive socket or
PPM4110A 11/32" but a 3/8" fits the only old head I have around.

Re: Name that tool please, passenger head temp sensor plug
 

Thanks! I see on Snap-on's web site they are calling them pipe plug sockets. Now that I know what they are called I see sets of them are available in male and female, or internal and external as Snap-on calls them.

Of course I have an oddball size so I can't cheat with with a common ratchet extension. :-)

Re: Name that tool please, passenger head temp sensor plug
 

Yeah, that's why I bought the set, don't use em much but when you need em you need em!

Re: Name that tool please, passenger head temp sensor plug
 

Or a cheap extension from Harbor Freight and a couple of minutes on the grinder...

Just be careful not to get the work piece to hot, or it will soften the temper.

Re: Name that tool please, passenger head temp sensor plug
 

That's what I did. Cheaper than buying a set of square drive plugs that I'll never need and faster since I had a spare on hand!

Re: Name that tool please, passenger head temp sensor plug
 

x2, you may have to heat around the circumference to get it to break loose though. some of that aged pipe dope doesn't break loose too easily...