Oh the Joy, 3.2 Case Through Nut LEAK?

[DRACO A5OG]

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

[mikedsilva]

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.

[scootergt3]

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.

[DRACO A5OG]

Oh Perfect, thank you Brothers!

[arbita1]

I've seen a video where the guy recommends to put 574 under the washer of this nut.


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[impactbumper]

Originally Posted by arbita1

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.

[DRACO A5OG]

I'll try some 3Bond aka HondaBond/YamahaBond on next oil change.

[drola]

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?

[DRACO A5OG]

I sealed it and it worked, no more drips.

[Cairo94507]

Every once in a while the Porsche Gods smile on you.

[boosted79]

"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?

[Ken911]

[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.

[drola]

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.

[Ken911]

Yeah thats why i was thinking a helicoil might fit, a time sert will not because it has a shoulder on it.

[john walker's workshop]

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.

[Alan Goettel]

Originally Posted by john walker's workshop

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!

Thanks for sharing your skills
For All these years.
Makes it possible for us do it yourselfers.

Alan

[drola]

Originally Posted by john walker's workshop

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?

[john walker's workshop]

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.

[prschmn]

Too bad that isn't going to work for Drola's problem-great idea for Dracos though!

[drola]

Originally Posted by prschmn

Too bad that isn't going to work for Drola's problem-great idea for Dracos though!

why would this not work for me?