P.P.P. is a killer for TIG
Ultrasonic bath is the jobby, to start with, and just for good measure after prep
As well as cleaning out as much oil residue as humanly possible, I would say that also drilling the ends of the crack would be an idea, to stop it spreading??
Whats p.p.p. Dr. Shox ?
Hmmm, if it's the outside wall of a crankcase, perhaps drilling holes in it wouldn't be wise
Whats p.p.p. Dr. Shox ?
Yes I am well aware of the cleanliness required in tigging ally, I was concerned about any internal combustion with any oil that may be trapped inside.Assuming you are going to TIG it, then yes there will be problems. Needs to be exceptionally clean. The casting alloys can be quite porous, and hold oil annoyingly well. Sometimes you have to heat the crack up with no filler many times to get all the oil out.
I've had some rods similar to these lying around for years but never used them http://www.aluminiumrepair.co.uk/ I did see them being demonstrated at a show once-of course they performed brilliantly at the show as you would expect. I mention them as using a blowtorch method may be a better option-but I don't know.There is probably some info on this forum about them.
I've found that tig will suck up any contamination in or behind the joint and bring it to the surface.
The thing is though, whatever process you use in this instance, preparation has to be immaculate so yes-oil residue is a problem to answer your question.Good luck with the repair.
Yes I am well aware of the cleanliness required in tigging ally, I was concerned about any internal combustion with any oil that may be trapped inside.
Yes I am well aware of the cleanliness required in tigging ally, I was concerned about any internal combustion with any oil that may be trapped inside.