Reply To: Engine Block Cleaning Maintaining

[Gregory Long]

An aluminum crankcase looks best if it is natural aluminum. When it is painted, it LOOKs, ‘Painted’. I do not really care for the painted aluminum look,, The ’29 and later cast iron engine blocks were painted, and look correct when painted..

Use Glyptal on the inside to seal the porous aluminum.. I’ve had more than one CLEAN aluminum S80/81 crankcase weep engine oil from the oil flinging off a connecting rod/journal.

Use an aluminum cleaner, like used on aluminum boats, pontoons, and railings near water.. The aluminum will come out clean and with little staining.. The natural aluminum surface is much better looking and IS authentic .

Greg L