Do not clean cylinder block in an acid bath unless camshaft bushing has been removed.
An acid bath can severely damage camshaft bushing.
Soak cylinder block (3) in an acid bath if camshaft bushing (1) has been removed and if
heavy deposits exist in coolant passages.
If camshaft bushing (1) has not been removed and coolant passages have heavy deposits,
soak cylinder block in a solution of hot water and laundry detergent. Maintain water
temperature of 190°F (88°C) and allow cylinder block to soak for a period of 30 minutes.
Following cleaning by either method (Step (1) or (2)), rinse thoroughly with clean, fresh
water and allow surface to dry completely.
If a sizing hone is used to correct a minor cylinder bore taper or to remove minor
grooves in cylinder walls, immediately clean bores using a strong solution of laundry
detergent and hot water. Rinse thoroughly with clear water.
After rinsing and drying cylinder bores, wipe bores with white, lint-free cloth that is
lightly oiled. If grit residue is present on cloth, clean bores again in detergent solution.
Check flatness of cylinder block (3) top surface.
Place a straightedge along length of cylinder block top.
Measure gap under straightedge in area between cylinders (five measurements, total) using a
Maximum allowable variation between any two of the five measurements is 0.002 in.
Inspect cylinder bores.
Visually inspect all bores for excessive glazing. Deglaze cylinder bores, as required.
A properly deglazed cylinder bore surface will have a crosshatched appearance with lines
at angles from 15° to 25° with respect to top of cylinder block. Included angles on
crosshatch will be from 30° to 50°.
Measure diameter of each cylinder bore, from a point l in. (25.4 mm) below top of cylinder
block to a point 5.5 in. (139.7 mm) below top of cylinder block.
Minimum allowable diameter is 4.0157 in. (102 mm).
Maximum allowable diameter is 4.0203 in. (102.12 mm).
Maximum allowable taper is 0.003 in. (0.08 mm).
Maximum allowable out-of-roundness is 0.0015 in. (0.04 mm).