Aluminum oil pan crack repair?

[A930Rocket]

I’ve got a small crack in my aluminum oil pan, that I think probably happened, when I had the baffle welded on the inside. I’ve been searching for this leak for the longest time, but didn’t think about a crack in the oil pan. I used dye and found it quickly.

It’s leaking steadily.

Until I can pull the pan to weld it, what are my options? Or can it be welded from the outside?

In the meantime, I’ve drained the oil out. Can I clean it up and JB weld it? I’m going to the track next weekend and have limited time.





That dye is some funky stuff. I should’ve used it ages ago.

[manbridge 74]

We had a guy buy a triple white 88 911 cab from BAT. The case was JB welded along a 3 inch or so crack. Probably work on your pan till you can weld it.

[908/930]

For temp fix you can try a 60 deg punch beside the crack and gently form over some material. I don't think I would weld on on the car, need to remove all oil from in and around that crack. I normally would TIG something like that. MIG would possibly sink less heat into it though if you really wanted to leave it on the engine. I would Purge the pan with argon though and still likely to have burnt oil near the weld.

I have used Ardrox P6R for dye checking in the past with a developer, it also works very well

[Zeke]

No, don't weld on the car. Bad idea for more than one reason.

I took a 901 shifter base to a TIG welder before I went to TIG school. Even the shifter housing was so contaminated that he had a hard time with oil coming into the weld pool.

High temp epoxy would be what I'd do. What I'd do. I'm not recommending anything.

Don't quote me on this but This Old Tony said cast AL can't be welded. So you're left with some kind of brazing process. Again, don't ask me about AL/bonze either. I've never used any. I haven't seen anywhere that it is used on AL much less a casting.

I seem to think that there is a brazing process that might work for you. Meanwhile....

[A930Rocket]

I went with JB Weld because I don’t have time to get it fixed properly befor next weekend.

Who knows, it could end up being a long-term fix…

[rfuerst911sc]

As long as the repaired area was clean and dry there's no reason that shouldn't hold up . Not much pressure there but does get thermal expansion . You really had nothing to lose with the repair . Good luck 👍