Looking for some tricks to getting the slotted head bolts removed to get the motor plate off (pics below for reference). I have tried some heat, tapping the end of a big screwdriver while turning, and an impact driver (not a gun, but the tool you hit with a hammer) which only twisted the bit. I am going to get a bigger hardened bit for the driver and try that, but hoping one of you may have a trick that works.
Get the screw head red hot with an acetylene torch. It will back out with nothing more than a big screwdriver. Be sure the screwdriver bit fits the entire slot, thickness and width, even if you have to grind it to fit. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
I will let you know what worked, I was being a little conservative with the heat but will take your suggestion Jerry.
Showkey, yes better bit is going to be the key! I completely twisted the crappy one I have, glad the bit twisted over the screw head, those do not look like very common bolts.
To me it looks like they center punched the ends of each slot to keep the screws from backing out. Do as Jerry says, a good hammer type impact driver with a good fitting bit and a acetylene torch with a small tip to heat the screw fast in the center of the head and the driver should get them loose. Don’t use propane, it will not heat the screw fast enough to do much good.
Hope this helps
1967 GMC 9500 Fire Ladder Truck "The Flag Pole" In the Stovebolt Gallery 1946 2-Ton grain truck 1946 3/4-ton pickup, 1953 1-ton pickup 1957 1-ton flatbed dually, 1954 Pontiac Straight Eight Of all the things I've lost in my life, I miss my mind the most!
As an addition, get a square shafted screwdriver and put a wrench on it to help you turn it if the bolt is really stuck after heating.
1970 Chevrolet C10 Grandpa's -- My first truck -- In progress to shiny Follow the build in the Project Journal 1950 Chevrolet 1-Ton Dually "Ole Red Girl" In the Stovebolt Gallery More pictures here 1951 GMC 9430 1 ton dually--Shiny! | 1972 Chevrolet C20- Rusty- the puzzle box lid for the C10 | 1962 AMC Rambler American- my wife's Parts trucks- 1951 GMC 9300 | 1951-GMC 9430 | 1951- Chevrolet 1300
The screws are staked in place so they can be a bit of a bear to get out sometimes. I don't have an oxy/acetylene torch so I do the above. I generally use a really really long screwdriver, 2 foot plus, that has a hex shaft. I attach a 12 inch adjustable wrench and have my son push and twist on the screw driver while I apply additional leverage with the adjustable wrench. Tighten just a bit to get the screw to move a bit, then loosen.
Using a carbide or diamond tipped burr in a Dremel tool or a die grinder to nibble away at the stake marks helps, also. Having a torch, machine tools, and 60-something years' experience is hard to beat, though! Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Thanks For the help, I found a better bit for my impact driver, help it straight with some tension, and had my son on the hammer. We got all 3 out, and he only hit my hand twice! When I go to reinstall the plate, should i re-peen the screws, or is red loctite acceptable?
Even blue LocTite should be sufficient. Just make sure the threads on the screw and the block are clean, with no oil on them. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Thanks For the help, I found a better bit for my impact driver, help it straight with some tension, and had my son on the hammer. We got all 3 out, and he only hit my hand twice! When I go to reinstall the plate, should i re-peen the screws, or is red loctite acceptable?
LOL More training on the hammer. Or revoke his hammer license. Or even better have him holding while you hammer.
Like Jerry said, clean threads and just about any threadlocker.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
More training for sure, that kid has a 80 mph slapshot and can hit any spot on the net from the blue line.....but swing a hammer straight, not so much! I tried getting him to hold the driver but the constant flinching while i was about to swing was driving me nuts.
