Removing brass temperature sensor insert 460

dhermesc

Well-known Member
We are in the process of putting new gauges in the Farmall 460. Everything was going well until my son tried to removed the temperature sensor by the exhaust manifold. The sensor turned out no problem - but the brass insert that the sensor turns into was/is another issue. The head of it snapped off when he put a socket on it. I bought a larger easy out to try and turn it out - no go so far - it just peels off the inside of the insert. How hot can you get the brass to turn it out? I don't know if it is the original sensor but I am fairly certain if has been out before - the engine was said to have been overhauled in the late 1990s when the last owner bought it.

I am afraid there is a good chance this has had some type of thread locker or permatex put on it to seal it up. It has to come out because the new gauge comes with its own insert and would not turn into the old one. Can you get it hot enough with a propane torch or do you need a acetylene torch to get it hot enough? Any suggestions beside heat to get it out?
 
I would try two things. First, grind a 3/8ths drive Allen bit square and sharp on the end. You want the hex to broach a female hex into the part you want to retrieve. Before driving it in, heat the fitting with a propane torch to melt any sealant or loc-tite. Drive it in there and turn it out. If the brass continues to strip, get in there with a keyhole saw until you can collapse the fitting.
 
Heat it until you see green in the flame. Then let it cool. It should be loose unless the locker locked it up again.
 
If the other ideas fail and you have room to access it for this you can drill it out so a hack saw blade, can fit in it. Then use a blade holder ..see link.. and saw through it just until you touch the threads. Then use a chisel and collapse it.
Example blade holder
 

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