Yes, I can give you some advice. That is that there are probably few dilemnas more disasterously alarming than breaking a drill bit off in a bolt that is stuck, unless it is breaking off an easy out. My advice is not to use an easy out or I assure you the time will come when you do so to your sorrow. I just completed a four day stint removing a four inch bolt enshrouded for 3 1/2 inches of its length from the top steering tower of an F-20. It had stood in the rain for years. Probably longer than I've been alive. Compound this with the fact that it was not an original bolt with the smooth shank but rather had aggressive threads filled with corrosion and producing an ungoldy amount of friction. It was nerve wracking to say the least. As careful as I was, I still managed to break off a drill bit. Things were going fine and then the 13/64s broke off in a matter of seconds. I'm still not sure why except that perhaps I was drilling in too deep. Next time I will go no more than 3/4's of an inch before going up the next size bit and then fall back and drill deeper with the first one. Thankfully I had the unusual benefit of being able to drill out from both ends. I've had to drill out a few bolts before but this was a marathon. I went through a myriad of Dremel bits, a propane torch, a can of liquid wrench and more hours than I care to try and add up pounding in both directions with a single jack.
You don't have the "luxury" of drilling from both directions but before you start I would have: 1) Reverse thread drill bits. I'm not sure if they sell them in complete sets but I'm going to look into it before I go through that living hell again. A complete drill index by 64s would be worth the money to me.
2)Douse those bolts for at least a week with liquid wrench at a bare minimum, once when you get up in the morning, once when you get home from work and once before going to bed. Don't dream of shorting this step or you will be very, very sorry.
3)You said you don't have a welding torch, but I would still get that area very hot with a plain old propane torch. It isn't nearly as good but if things go wrong you wish very dearly that you had at least given it a try. I've had some surprising success by doing so though I must aggree that a welding torch would be considerably better.
4)I believe I know what you mean by the "water jacket cover" though my tractors have no such piece and I would say the following applies. Whenever I have taken loose such a part, be it a radiator elbow, water pump, you name it I always put it back in with either bronze or brass bolts and lots of anti-seize. I'm probably kidding myself but I like to think that my antique tractors will outlast me and such a step will assure that should any such part have to be removed again in 50 plus years it should come loose with a minimum of hassle. The extra money spent for that peace of mind it well worth it to me. Without question the next guy is going to thank you and bless your foresight. It might even be yourself.
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Today's Featured Article - The Great Escape - by Dave Hollrah. It all began Monday with a little baling of second crop on the lake shore field, and as I drove out past my sister and her hubby's place, this small calling sound could be heard from the general direction of their manure pile. Out of the yard, over the cows and bale piles, through the dozer piles, poplars, and brush, out onto the ditch grade road, past the noisy 6.2 diesel engine pulling my well traveled Suburban along. Well it sure didn't take me long to figure out what it was because I alrea
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