[BavSS67]

I have an 402 engine that is ready to paint but I neglected to remove a plug for the TCS sending unit on the passenger side cylinder head. The plug has a recess for a 3/8" drive. I have tried a breaker bar drive on it, tried using a cold chisel to drive it and it is starting to look a little worn.
Does anyone with their repetoire of experience, had any luck in getting a plug out of a 30 plus year old head?
I am worried about trying an acetylene torch as perhaps the head would crack. If I drill it out, I may lose the water pump.
Some how, some way that plug is going to come out.
Many thanks in advance, John.

 

[DriveWFO]

I've read about some guys on here heating frozen bolts and then puting wax on the hot bolt. It will draw the wax into the threads and allow you to remove the bolt.



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[mrtimstik]

PB Blast penetrating fluid??? Helped me out on a few body to frame bolts on my bro-in-laws 40 Chevy. Let it sit overnight and shot it a couple times. Breaker bar and pipe required.

 

[Carl Stevenson]

The guys in the dealership where I work weld a nut onto the plug, using a 220 mig or an arc welder. This does 2 things. Heats the plug a bit which helps it come out, and gives you a nut to put a wrench on. They had one a few weeks ago that finally came out when they welded the fourth nut on. (First 3 the welds broke before the plug came out) I wouldn't think this would heat the head so much that it would damage anything.

No warranty of any kind suggested or implied with this suggestion

Carl

 

[Real McCoy]

I could never get the oil galley plugs out of blocks until I started using heat. I use a cutting torch to heat the plug itself. The block also gets hot but the plugs unscrew very easily after I heat them up. Been doing that for many years now with good success. RM

 

[sproosemoose]

i would think as long as you didn't try to cool the head too fast (i.e. dumping water on it after heating it up) you won't crack it. there's a lot of iron there.

 

[BavSS67]

Thanks all for your suggestions. We tried heating the heck out of the plug but she still wouldn't move. As a last resort I borrowed a candle, let the wax do it's thing for 30 sec and hit the plug again with the breaker car. Out she came like a piece of cake!
John.

 

[DriveWFO]

Thanks all for your suggestions. We tried heating the heck out of the plug but she still wouldn't move. As a last resort I borrowed a candle, let the wax do it's thing for 30 sec and hit the plug again with the breaker car. Out she came like a piece of cake!
John.

I'm glad it worked out for ya :beer:



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