[faapgar]

Remove the pistons.Buy some white Terry cloth shop towels and a quart of ATF.If you have Ultrasonic cleaning available have the cylinders cleaned that way as it is the best.The heat from the Ulrasonic helps to open the bores to release the black grit from honing.If you clean them yourself spread ATF on the cylinder walls and wipe clean with Terry cloth towel several times until the towel just shows red and no more black.2nd step is get a good pair of gloves.Place cylinders in oven and turn the temp to 225 F.Do this while your wife or mate is not home.There is no smell from this procedure however.After 15 minutes remove a cylinder and redo the cleaning.You will see black on the cloth as the pores of the surface are open more and you getting the last grit out.Failure to clean the cylinders correctly is the biggest reason piston rings do not seat leading to burning oil.The grit will ruin your bores and everything else it comes into contact with.Takes about 5-6 hours to do this by hand for all 6.That is why I recommend the Ultrasonic method.Cost you $120-240 depending on the shop.Clean your rings with ATF as well to remove the black grit from machining.When used to buy P & C from Porsche OEM they were pretty.When you buy Mahle from aftermarket supply house they are not clean.Ciao Fred