I had the Mahle 94 mm P&C pulled and replaced with 96mms
The pistons were cleaned with oven cleaner; now there are a few black carbon remaining. How should I proceed with removing them before looking for a new home ?

Will probley just use the oven cleaner on these too

Be careful, oven cleaner can have lye [sodium hydroxide] as the active ingredient. . It
eats aluminum fast. . better to soak them in a solvent or bead blast.
If you want them to look like new, bead blast with plastic bead medium.

Jim http://www.orisonmarketing.com/pistonkleen.html

I wouldn't invest a bunch of time cleaning them up if you're going to try to sell them jim. Used engine parts. As is. You'll never see any money for your time.

What is your plan for your build?
Im guessing you planning on keeping the L-jet.

He's moved/moving to a 2056.

I have a gallon of Berrymans carb/parts cleaner that comes with a basket. Drop the pistons in one at a time and let them soak for a day or two, they'll come out and with a little scrubbing most of the junk should wash away.

Tell me that's not from your 1.7. That thing was really a sweet motor, in my opinion worth more as a whole, Unless you had some catastrophic failure???

I still have an L-Jet; installed new 1.8 heads, 96mm P & Cs, plus a few minor changes. It had a 2L crank fro when the 94mm P & Cs were done maybe 10 years ago.
Runs much better, hills that used to cause lugging and down shifting are easy now
All the parts I took off were fine except one cylinder head that had a striped spark plug threading on #3 cylinder. I want to clean all the part and get them ito someone in need of P & Cs

See if you can find a drill pad that looks like a green scrubbing pad, mount in drill press and hold piston while running drill press fast. Not a lot of pressure so you don't scratch the aluminum too much.

Excellent sounds like as plan

X2 on the Barrymans soak, vs abrasive cleaning with a scrubbing pad.

Like this:

The guy at O'Reillys said Chen-Dip is not allowed in California ??

Glad you put a bit more giddy-up into your beautiful car!!!!

Thanks for the compliment; two ore things to do; changing out the throttle body for a rebuilt Vanagon 2.1 TB, and looking to upgrade the exhaust/ headers/etc.

Made up over the toll roads hills last Saturday at speed for the first time.... And looking forward to the drive to WCR 2017 at Mammoth Mountain....

Chem dip eats aluminum.

https://www.youtube.com/watch?v=VcPkLuX4CAU

Reality check.

https://www.berrymanproducts.com/products/e...-parts-cleaner/
https://www.youtube.com/results?search_quer...an%27s+chem+dip

It is possible to de-coke the pistons and valves in situ,making a visual inspection simpler.
Used with an ultrasonic tub,the potmetal and alloy parts emerge immaculate,and undamaged.
Cleaning of aero parts is effected in a similar way,mil spec,have been for decades.

/
Using the product,one would marvel at the results,like with the oil stained cylinder heads of your favorite air-cooled engine.
The stuff is fabulous,the aluminum or magnesium castings pristine.Trans shops use it to rework rebuilds,as new.
There are similar,competing brands,tho they are less eco-friendly,some are real nasty.
https://www.google.ca/search?q=gunk+carb+cl...SS5v9ilc8E_M%3A

/