[AT] stuck plugs

[John Hall]

Just when you thing you have seen everything...

We had a Farmall Super A in the shop doing some various repairs for the 
owner. It was skipping so we decided to change plugs. Should have taken 10 
minutes except none of them would move. One of them was gotten out with an 
air wrench, another was twisted into just below the hex and the others had 
the hex rounded off. To make a long story short we had to pull the head and 
heat them to get them out. One of which I had to use a 3/4 drive impact 
wrench on even after heating it twice with the torch. The plugs were a 
mismatched set and I think a couple of them used tapered seats instead of 
metal washers. We also think the tractor had been leaking water into the 
combustion chambers and causing rust. It also appears this head came from a 
different tractor since its paint job didn't match the rest of the 
tractor--so no telling what its story is. This is one of those jobs where 
you are glad are paid by the hour, not by the job!

John Hall