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| Exhaust manifold studs http://www.international2cvfriends.com/forum/viewtopic.php?f=7&t=5304 |
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| Author: | Ianredspecial [ July 4th, 2014, 8:22 pm ] |
| Post subject: | Exhaust manifold studs |
Soo my exhaust manifold studs are just turning more or less freely. Apart from one which snapped off a while ago. It's blowing badly now, funny that! Will it be possible for me to re-tap these holes to the next size up? Or is it a heli-coil job. The reason I ask is because I'm happy with a tap and dye but never done a heli-coil so it'll have to go to the garage for that, probably. Although there's a first time for everything I guess. |
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| Author: | Russell [ July 4th, 2014, 8:55 pm ] |
| Post subject: | Re: Exhaust manifold studs |
If you can get the studs out you can retap them to m8. |
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| Author: | Ianredspecial [ July 4th, 2014, 9:36 pm ] |
| Post subject: | Re: Exhaust manifold studs |
Fantastic, thanks. I wonder if that's been done before though, about ten years ago it went to the garage with a similar problem. I guess I'll find out. |
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| Author: | Russell [ July 4th, 2014, 10:03 pm ] |
| Post subject: | Re: Exhaust manifold studs |
If the nuts on them were 11mm it was the standard m7, if they were 13mm they're m8. |
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| Author: | Ianredspecial [ July 4th, 2014, 10:09 pm ] |
| Post subject: | Re: Exhaust manifold studs |
Yeah they are 11mm so that's all good. Thanks. |
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| Author: | lpgo [ July 5th, 2014, 3:12 pm ] |
| Post subject: | Re: Exhaust manifold studs |
Be aware that bringing them to M8 you have very little/no space between 13mm nut and exhaust manifault..... |
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| Author: | Ianredspecial [ July 5th, 2014, 9:20 pm ] |
| Post subject: | Re: Exhaust manifold studs |
Thanks, good point. Maybe I'll do my first heli-coil then. It seems easy actually. Have to remove one stud first which is snapped flush. Oddly not much of a blow on that side, it's the other that's gone fully tractor-ised. |
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| Author: | lpgo [ July 5th, 2014, 10:51 pm ] |
| Post subject: | Re: Exhaust manifold studs |
Try to weld a bolt to the stud, even what is left over of it, the heat will loosen it, so if you have half a decent weld you can loosen it.. or take a big nut M16 or so and weld the stud to it, try to release it then..... heat will do the trick..... Nothing to loose there  you can always drill it out if it doesn't work....
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| Author: | Ianredspecial [ July 5th, 2014, 11:54 pm ] |
| Post subject: | Re: Exhaust manifold studs |
That sounds very satisfying, I don't weld though so I'll have to try an easy-out. |
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| Author: | Sean [ July 6th, 2014, 9:35 pm ] |
| Post subject: | Re: Exhaust manifold studs |
use a 25mm M8 "allen head" cap screw. lpgo wrote: Be aware that bringing them to M8 you have very little/no space between 13mm nut and exhaust manifault..... |
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