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Question Oh the Joy, 3.2 Case Through Nut LEAK?

So I was under the car today and noticed a new drip trail emanating from the nut circled in red D-Side on the engine case. I assume it is a case through nut. Is there an oring behind it that may be leaking?


Not my car, thank goodness but thanks donor from Rennlist

I checked the torque, it is at 25 ft lbs so I am thinking an oring that gave out.


1985 Porsche 911 Carrera Targa - Main Engine Components - Page 3

TIA,

Jim
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Last edited by DRACO A5OG; 08-22-2016 at 10:34 PM.. Reason: typo
Old 08-22-2016, 10:14 PM
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Yes, that is a case through bolt which helps clamp the intermediate shaft.

The common problem with these, is that the stud pulls out of the other side of the case which makes it impossible to torque. But if yours is at 25lb ft, then that is unlikely the issue. Lucky too, since the only way to fix that, is split the case.

There is no o-ring.. just a washer and nut. Try cleaning the thread, spread some thread sealing compound, then put the nut back on and re torque.
Old 08-22-2016, 11:38 PM
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technically , its not a case through bolt. just a stud and nut.. the case through bolts are around the cylinders, use o rings and have pressurized oil flowing around them. just like mikeD said, remove nut, clean it up and install new nut and washer. there I no pressurized oil behind that nut.
Old 08-23-2016, 03:49 AM
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Oh Perfect, thank you Brothers!
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Old 08-23-2016, 06:26 AM
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I've seen a video where the guy recommends to put 574 under the washer of this nut.


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Old 08-23-2016, 02:57 PM
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Quote:
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I've seen a video where the guy recommends to put 574 under the washer of this nut.


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i would use black silicone rather than 574 there.
Old 08-23-2016, 05:12 PM
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I'll try some 3Bond aka HondaBond/YamahaBond on next oil change.
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Last edited by DRACO A5OG; 12-06-2016 at 11:35 PM..
Old 08-24-2016, 08:24 PM
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sorry to hijack but i have a question. i have the same issue with the lower dome nut behind the oil cooler. i tried to torque it and right when i got to 25 lbs i felt it pop, meaning it jumped threads inside, which would explain why that nut was loose in the first place. any suggestions?
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Old 12-06-2016, 08:29 PM
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I sealed it and it worked, no more drips.
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Old 12-06-2016, 11:36 PM
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Old 12-07-2016, 06:27 AM
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"sorry to hijack but i have a question. i have the same issue with the lower dome nut behind the oil cooler. i tried to torque it and right when i got to 25 lbs i felt it pop, meaning it jumped threads inside, which would explain why that nut was loose in the first place. any suggestions? "

Not good. Magnesium case?
Old 12-07-2016, 06:39 AM
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[QUOTE=boosted79;9387050]"sorry to hijack but i have a question. i have the same issue with the lower dome nut behind the oil cooler. i tried to torque it and right when i got to 25 lbs i felt it pop, meaning it jumped threads inside, which would explain why that nut was loose in the first place. any suggestions? "

Not good. Magnesium case?[/QUOT
you could install a heilcoil and reset the stud. If the case is apart then I would use a timesert instead.
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Old 12-07-2016, 10:03 AM
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case is not apart and trying to keep it that way. i put a double nut on the stud and turned it till it bottomed out. now just waiting for the oring to arrive from our host to try again. i tried to double nut it again to turn the stud out to remove it but it did not want to spin. so hopefully it will stay. i don't think it will be possible to put a heli coil in there without splitting the case, unless it fits through the hole which is slightly larger than the stud anyway. i'll see what happens first before i go that route.
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Old 12-08-2016, 04:45 AM
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Yeah thats why i was thinking a helicoil might fit, a time sert will not because it has a shoulder on it.
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Old 12-08-2016, 07:16 AM
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One a mag case, when that stud pulls and leaks oil, run a 10x1.25 tap in the hole and use a short bolt and aluminum washer. No drilling needed, no damage done. Timesert the stud hole sometime when the case is apart.
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Old 12-09-2016, 07:29 AM
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Make it work

Quote:
Originally Posted by john walker's workshop View Post
One a mag case, when that stud pulls and leaks oil, run a 10x1.25 tap in the hole and use a short bolt and aluminum washer. No drilling needed, no damage done. Timesert the stud hole sometime when the case is apart.
Like he said!

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Old 12-09-2016, 09:09 PM
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Quote:
Originally Posted by john walker's workshop View Post
One a mag case, when that stud pulls and leaks oil, run a 10x1.25 tap in the hole and use a short bolt and aluminum washer. No drilling needed, no damage done. Timesert the stud hole sometime when the case is apart.
This is a great suggestion. Thanks
Do i torque it to 25 ft lbs like the original nut on the stud?
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Old 12-09-2016, 09:22 PM
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25lbs is probably why it pulled. 18 max for an 8mm fastener. The 10mm Bolt trick just needs to be lightly torqued so it seals. It's not holding anything.
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Old 12-11-2016, 06:41 AM
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Too bad that isn't going to work for Drola's problem-great idea for Dracos though!
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Old 12-11-2016, 08:14 AM
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Too bad that isn't going to work for Drola's problem-great idea for Dracos though!
why would this not work for me?
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Old 12-11-2016, 04:40 PM
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