TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Cylinder Head (002-004)
Section 2 - Cylinder Head - Group 02
Page 2-7
Disassemble the cylinder head. Refer to Procedure 002-
020.
Scrape the gasket material from all gasket surfaces on the
block and head.
WARNING
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing to avoid
personal injury.
Clean the buildup of deposits from the coolant passages.
Excessive deposits can be cleaned in an acid tank, but the
expansion plugs must first be removed.
WARNING
Do not mix gasoline, alcohl, or gasohol with diesel fuel.
This mixture can cause an explosion.
WARNING
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing to avoid
personal injury.
WARNING
Use skin and eye protection when handling caustic
solutions to avoid personal injury.
Clean the cylinder head combustion deck with a Scotch-
BriteTM pad, or an equivalent cleaning pad, and diesel fuel
or solvent.
WARNING
Wear protective eye covering while cleaning carbon
deposits to prevent eye injury.
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 loosen steel
bristles during operation, thus causing additional
L-803
