TM 5-2420-230-24-2
Cylinder Head - Cleaning (2-03)
Cylinder Head - Group 2
Page 2-8
B Series Shop Manual
Scrape the gasket material from all gasket surfaces.
Clean the build-up of deposits from the coolant passages.
Excessive deposits may be cleaned in an acid tank but
the cup plugs must first be removed. Refer to Cup Plug
Replacement procedure (2-10).
Clean the combustion face with a Scotch-Brite pad or
an equivalent cleaning pad and diesel fuel or solvent.
Warning: Wear protective eye covering.
Clean carbon deposits from the valve pockets with a high
quality steel wire wheel installed in a drill or a die grinder.
NOTE: An inferior quality wire wheel will loose steel bristles
during operation, thus causing additional contamination.
L-271