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Another setback averted! Broken bolt removed ! I've been buttoning up an engine, basically put together from parts I had around me. Virtually the last thing to go on was the clutch pressure plate. 6 of the correct bolts were rounded up and the clutch and plate fitted. Just putting that final little tweak to make sure they are tight and the last one snapped.
Dayum! I didn't want to take the sump pan off again, as it had already been off and on again twice(!). I tried to drill the bolt with a drill I had resharpened to cut as a left hander but it didn't work very well and started to go a bit off centre. I regrouped and decided to improvise a bush. I got a short length of 5/16" brake tube and a short length of 1/4" tube. I had to drill the larger tube to fit the 1/4" tube inside. They were pushed into the hole. http://i279.photobucket.com/albums/k...ps57a93a8c.jpg And a 3/16" drill was used to drill into the bolt. The bush was good enough to get the drilling back on centre. http://i279.photobucket.com/albums/k...ps661bed33.jpg I don't have any easy-outs, so I used a T30 torx bit and hammered it into the remnants of the bolt. http://i279.photobucket.com/albums/k...psfe250a03.jpg The bolt remnant came out successfully on the first attempt. http://i279.photobucket.com/albums/k...ps32ddac60.jpg Here's the bolt with the retrieved end. You can see the splines broached into the end by the torx bit. http://i279.photobucket.com/albums/k...psbd710795.jpg I think there is a time and place for easy-outs or my improvised version. Removing something that is rusted in place so tight that the bolt shears while trying to remove it is NOT the right application. A bolt that snaps due to material defect or overtightening IS the right place for them, as the remnant isn't tight in the hole. Mart. |
Re: Another setback averted! Broken bolt removed ! Pretty neat trick!
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Re: Another setback averted! Broken bolt removed ! Mart, the shoulder on that bolt looks too long, could that be why it snapped?
Clever drilling jog! |
Re: Another setback averted! Broken bolt removed ! Great recovery!! Things like that happen to me and sometimes I get so discouraged that I walk away from it for a week as I am too pissed off to continue. Good job.....Matt in Alameda
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Re: Another setback averted! Broken bolt removed ! Great "engine-unity"
And, definitely the wrong bolt. Not enough threads on it. |
Re: Another setback averted! Broken bolt removed ! I like stories like this with a happy ending! This shows what a cool head and good ol' redneck or yankee ingenuity can accomplish.
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Re: Another setback averted! Broken bolt removed ! "Yankee" ingenuity from across the pond. Mart hangs in Her Majesty's England. DD
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Re: Another setback averted! Broken bolt removed ! Limey ingenuity if you don't mind!.
lol I'm pretty sure the bolts are the correct type, the others are the same. There's no sign of the shank of the bolt bottoming on the threads. They have to have the plain part as they are dowel bolts to position the pressure plate. I'm assuming that one must have been overtightened and overstressed in the past. I wasn't really pulling on it, I was only using a 1/4" drive rachet. |
Re: Another setback averted! Broken bolt removed ! 1 Attachment(s)
Out of curiosity, I pulled a pressure plate bolt out of my spares. It looked like yours, Mart, but I pulled another and it looked like more what I expected. No markings on either, who knows which is OEM? Quite a difference in OAL and shoulder length.
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Re: Another setback averted! Broken bolt removed ! yes had the same problem with exhaust bolts putting them back on pulled two holes. got a heli coil kit from napa tap it out and put the heli coil in it and it worked perfict
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Re: Another setback averted! Broken bolt removed ! Nice work Mart. I had a kit to modify the fuel pump on a Cummins diesel engine a few years ago. Three of the four bolts to hold the top on were hex head. One was a "break-off" fastener so the pump couldn't be messed with by the DIYer. The instructions in the kit said to tap a torx bit into the hollow left from the "break-off" and turn it out with 1/4drive. Worked like a charm. I've fought with a few broken bolts since, forgetting this method. Thanks for the reminder, maybe I'll remember next time.
Howard |
Re: Another setback averted! Broken bolt removed ! Mart, that is a cool thing you came up with there. I'm always up for learning something new. Thanks for sharing!
So what caused it to break? and are you going to just put another one in there and hope it also doesn't break? |
Re: Another setback averted! Broken bolt removed ! check your bolt length part # 350433-s 5/16-18 x 25/64 used 35 to 48. NOTE.on rechecking new parts book (GREEN chassis parts book) lists # 350433-s as 5/16-18 x 25/64 BUT the 1928-1937 book lists it as 5/16-18 x 1" special hex. head bolt and I think that is right, the green book is wrong as both my reprint and original of the 28-37 book agree. Moral of story, do full research be for posting and wait till morning.
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Re: Another setback averted! Broken bolt removed ! I have always used the long shoulder type with lock washers.
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Re: Another setback averted! Broken bolt removed ! The Torx looks like a better option than the "easy out". As a machinist, we called "easy outs", "never outs " because they do one of two things, they don't get it out, and or they break off in the bolt, and then you are stuck with taking the hardened easy out and part to a machine shop with an Elox EDM machine to electrically arc burn it out. Great idea. Thank you.
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Re: Another setback averted! Broken bolt removed ! Awesome Mart!
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Re: Another setback averted! Broken bolt removed ! As cheap as they are, I like to use new bolts on pressure plates installs.
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Re: Another setback averted! Broken bolt removed ! Quote:
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Re: Another setback averted! Broken bolt removed ! Around 1949 Ford eliminated the shoulder on the clutch bolts. The reason is that the major dia. Of the thread is the same as the shoulder.
Regards, Don |
Re: Another setback averted! Broken bolt removed ! nice.....
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