Quote:
Originally Posted by Henry Schmidt
You might search for a hot tank service. Most hot tanks employ the used of caustic soda (Sodium Hydroxide) which can turn aluminum products black so I would search of a service that offers sodium metasilicate in their hot tank service.
TECHNICHEM offers the best we've found.
Have you split you case yet?
Did the failure damage to crank as well as the rod?
The yellow glob looks like epoxy...did you find anything that was repaired with epoxy?
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Oh, didn't think of checking "hot tank". Found someone near by I can follow up with:
https://dons-auto.com/machine-shop/ I will contact them and ask about methods and rates.
I split the crankcase and pulled the rod for the the destroyed piston. The rod has a gouge on one end, and is probably going to need replacing. It might be bent, hard to eyeball that for me. There were more piston bits in the crankcase. Other than that, it appeared quite clean.
The crank looked fine to my untrained eye. There is some damage to the worm gear and the large gear that connects to the intermediate shaft.
I didn't see any foreign objects in the oil pump, but I'm a little concerned it might have sucked something in.
The case and mainshaft seal (not sure about the name) had the epoxy-like stuff on a spot that I suspect was leaking after the initial rebuild, I think the chunk came from there. I will examine them more closely tonight or early tomorrow when I'm home.
I'll be taking everything to the area Porsche shop on Monday or Tuesday next week, and have been holding off on ordering anything until I can get expert in-person analysis. So currently I'm collecting info, doing some cleaning, and making lists of questions.
The results from that meeting should help inform how much needs to be replaced. Maybe full piston/cylinder set, maybe on option to bore out all existing cylinders, maybe replacing just one? We'll see!