Guys,

I have a waterpump housing of my 400 and I have ONE freakin nipple I cannot get out no matter how hard I try. I have sprayed the liquid wrench on it several times and clamped the crap out of it with vicegrips ...no luck.

I want to blast this housing and fit it with new nipples but this sucker is stuck tight! Any ideas?

This is where a "heat wrench" (torch) comes in handy. If you don't have access to one, try placing a bolt in the nipple to give the vice grps something to grab.

yes with your acetylene torch & a small tip heat the threads until it starts to turn red, stop & with vice grips it'll come right.

The last really stuck one I had, I used a ratchet handle (or anything steel) that fit snugly inside the tube, to keep it from crushing obround and with some propane torch got it hot.

Then used my vise grips and out she came..

Cut it down almost flush with the housing then get out the drill bits and drill out the nipple to the point where you can chip out the remains.

Heat is the way to go.I did get a few out using wax.Heat the housing and nipple with a propane torch melt some bees wax at the threads.It works.Had T bar that would not move once.Used the wax and it came right out.If you have regular torches use them unless its an aluminum housing.Rocky