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Old 09-30-09, 05:03 PM
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Question Coolant??
OK so I have a 1987 Mazda Rx7 turbo and was wondering if anyone had any good techniques to remove a broken stud as seen in the pictures.
Also what size is the stud.
It is the coolant line that runs from the turbo to the LIM.
Attached Thumbnails Coolant??-coolant1.jpg   Coolant??-coolant-2.jpg   Coolant??-coolant-3.jpg  
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Old 09-30-09, 05:12 PM
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use a set of vice grips and twist it out. or use a dremel and grind a notch in it to use a screwdriver to remove it. it is threaded into the LIM. use a set screw to replace it.
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Old 09-30-09, 05:19 PM
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tried the vice grips the are just spinning on it
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Old 09-30-09, 05:24 PM
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Tighten the vise grips more. You may crush the threads on the stud, but so what?
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Old 09-30-09, 05:35 PM
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Apply some heat with a torch before you try the vicegrips again. Heat makes everything expand slightly. The stud and the aluminum it is screwed into will expand at different rates, helping break the stud loose for easier removal.

This technique works well with a stubborn not *before* you break it off..
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Old 09-30-09, 05:43 PM
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Originally Posted by jackhild59
Apply some heat with a torch before you try the vicegrips again. Heat makes everything expand slightly. The stud and the aluminum it is screwed into will expand at different rates, helping break the stud loose for easier removal.

This technique works well with a stubborn not *before* you break it off..
I'll try that
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Old 09-30-09, 07:06 PM
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well I don't want to heat up that area yet I sprayed it with penetrating fluid earlier and that stuff is really flammable (not what I need right now) so I'll see what I can do tomorrow after school.
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Old 10-01-09, 06:41 PM
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try a heat gun
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Old 10-01-09, 08:02 PM
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the heat gun didn't want to work for me
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Old 10-02-09, 10:48 AM
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Originally Posted by 87 t-66
use a set of vice grips and twist it out. or use a dremel and grind a notch in it to use a screwdriver to remove it. it is threaded into the LIM. use a set screw to replace it.
The dremel idea is really good, I would try that next if you haven't yet.
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Old 10-02-09, 02:25 PM
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Originally Posted by Barnett87GXL
the heat gun didn't want to work for me
didnt work as didnt turn on?
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Old 10-02-09, 05:57 PM
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no as in the stud would still not come out.

On a side note I picked up the parts and the guy ordered the two bolts where it connects to the turbo not the LIM (Barnett87rx7)
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Old 10-02-09, 05:58 PM
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Originally Posted by EnjoiPugs
The dremel idea is really good, I would try that next if you haven't yet.
I do not own one. I'm still trying to use vise grips and penetrating oil to break it loose
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Old 10-02-09, 06:20 PM
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Dunno if this would work but if you have a screw driver you don't care about, try jb welding it to the stud and after it hardens, see if you can unscrew it then.
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Old 10-02-09, 06:38 PM
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Originally Posted by JxT
Dunno if this would work but if you have a screw driver you don't care about, try jb welding it to the stud and after it hardens, see if you can unscrew it then.
I don't have a welder to use right now
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Old 10-02-09, 11:10 PM
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jb weld is something you buy in a tube and squeeze out and gets almost as hard as a real weld you can buy at any autoparts store
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Old 10-03-09, 12:33 AM
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Spray the hell out of it with PB blaster. That stuff is god.

Then dab the extra off about 30 min later.

Heat her up with a torch (you can find propane torches in the auto parts store. Get some camping propane tanks too)

Get your vice grips on there as tight as you can. It should come lose after this.


If that doesn't work then you need to find someone with a welder.
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Old 10-03-09, 07:34 AM
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thanks fr the suggestions I've got lots of ideas to use now
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Old 10-03-09, 07:44 AM
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Originally Posted by TheGoldenSB
jb weld is something you buy in a tube and squeeze out and gets almost as hard as a real weld you can buy at any autoparts store
Not a chance in hell that'd work.
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Old 10-03-09, 10:38 AM
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Originally Posted by TheGoldenSB
jb weld is something you buy in a tube and squeeze out and gets almost as hard as a real weld you can buy at any autoparts store
I know what jb weld is. I didn't see the jb must have missed it when i was reading
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Old 10-03-09, 10:42 AM
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Yeah i know it prolly wouldnt work i was just correcting him. But heating it up with a torch and turnin it out is prolly your best bet.
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Old 10-03-09, 10:52 AM
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ya that is what I think i am going to do.
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Old 10-03-09, 11:20 AM
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Just make sure you know which way you need to turn it out. I had the same problem and i tightened it and made it worse.
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Old 10-03-09, 07:15 PM
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ya that is important to know
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