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Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!ZJ (93-98), WJ (99-04), WK (05+)
All ZJ/WJ/WK specific tech questions asked here!
It hasn't gone anywhere. A bunch of personal stuff came up over the weekend and I got politely asked (mandated) to attend a law enforcement conference in Albany. And it's raining on Long Island from what I hear. My partner said he was going to try and tackle it himself but he has not as of yet. Today he texted me and said he doesn't want to do it alone, he wants backup. So we're behind another week and are hoping to tackle it Saturday when I'm back on the island.
Bolt is still in. My partner is not having luck with the left drill bits and is basically ready to set the thing on fire. He says he doesn’t trust himself to drill and tap, so either I have to do it or I have to find someone else who is confident in their ability to do so.
When I drilled into solid metal I would put engine oil into the spot where the hole was being drilled about every 15 seconds with my finger. I drilled it out by running the power drill extremely slow in the RPMs over a considerable length of time. And by stepping up the drill bit size sequentially.
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
Originally Posted by stephanie42
Bolt is still in. My partner is not having luck with the left drill bits and is basically ready to set the thing on fire. He says he doesn’t trust himself to drill and tap, so either I have to do it or I have to find someone else who is confident in their ability to do so.
Left drill bits? You mean easy outs? And it only took him 2 weeks to say he's afraid to try it. What's to worry about worst case scenario he makes a hole in a broken bit, but wait, isn't that the object? Once it's drilled you have won, tapping is the easy part.
Goodness. Spray some oil on it and drill it and spray some more oil on it and drill it more.
So easy even a girl could do it. Heh
Left drill bits? You mean easy outs? And it only took him 2 weeks to say he's afraid to try it. What's to worry about worst case scenario he makes a hole in a broken bit, but wait, isn't that the object? Once it's drilled you have won, tapping is the easy part.
Goodness. Spray some oil on it and drill it and spray some more oil on it and drill it more.
So easy even a girl could do it. Heh
Hmmm I guess I’ll have to try lol. We’ve been really lazy with the truck because he has the other car for at least a couple more weeks.
She's talking about the left hand twist drills I told her about. Very often, once most of the metal is removed, the rest of the bolt will back itself out while you are drilling. It's very satisfying when that happens!
Dave alluded to this in one of his posts here but just to be clear, if using a left-hand or reverse flute drill bit you must run the drill in the counterclockwise (reverse) direction. Otherwise it will not bite into the bolt you are trying to remove.
Tip: If you are not certain on what type of drill bit you have try it in a piece of wood. You will notice a big difference in it's ability to cut when the drill is turning in the proper direction. Typical drill bit is run clockwise.
Again, as I stated before, the one problem with left hand twist drills is running them in today's hand drills with spin-tight chucks. They tend to loosen up when you least want them to. I was introduced to them in my job as a toolmaker and they are just the ticket for removing broken bolts because after you remove a lot of the metal, the bolt tends to loose it's grip on the threaded hole and back itself out. They save a lot of heartache for this job, but good quality drills are hard to find and some are not sharpened correctly.
10-05-2019, 07:16 AM
