I have my transmission apart on the bench and I can't get the drain plug out? I'm not sure if I should use heat or not; out of fear of melting the case? What do you guys think? A little heat with the propane or get glowing with the oxy?
Thanks' Jon
a little heat and a lot of heat are two different things
I played with some cut up cases and propane before
it did not ignite the magnesium mixture
I don't know if it would be safe or not to put an oxy torch to it
if it did ignite a magnesium fire you are in deep deep trouble.
it may be that the magnesium alloy of a case is safe and there is no risk...
but what if?
I've never had to use heat on over a dozen or so that I've played with
you should be able to get it with a correct wrench and some soaked in penetrating oil. Its an NPT type of thread pitch, so its probably just over tightened... try a breaker bar
Impact wrench.
I use up to MAP heat on them with no issue. I do not know about Oxy/acetylene, though.
I find that if heat does not work, I just drill a huge hole in the middle of the plug and use an easy out or other large rod with grippers. It comes out easy then. I have spare plugs if you need that are in perfect shape.
Even shavings of the case do not ignite well with MAP. I have tried to start parts of the case to see if I could with MAP, I could not.
Well I ended up using the impact and it came out. The threads were still good too.
Thanks for the help'
On my first trans oil change I had to use my socket breaker bar. It's at least 2 feet long. There was well over 100 ftlbs on the drain plug. I bet the last guy used a impact gun to put it in. I think the spec is 15 ftlbs.
I sprayed liquid wrench, tried it, no go. Did that every time (once a day at least) I walked by the tranny which was out on a bench, third day it came by hand, no power tools or breaker bars, no damage.
Ian Stott
Moncton
Canada
I have not seen any of the external 911/914-6 plugs for sale. Do you know a source?
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