TM 5-3810-300-24-&P-3
Cylinder Liner 1.6.3
Fig. 8 - Checking Bore of Cylinder Liner
Inspect the block bore and check the liner-to-block
clearance whenever a liner is removed. If the clearance
exceeds zero to .002" (cast iron block)
Fig. 7 - Cylinder Liner Measurement Diagram
it will be necessary
to bore the block for an oversize liner as outlined in
A cracked or excessively scored liner must be discarded.
Section 1.1.
A slightly scored liner may be cleaned-up and reused.
Cylinder liners are available in .001 ", .005", .010", .020"
Excessive liner-to-block clearance or block bore
and .030" oversize on the outside diameter. When an
distortion-will reduce heat transfer from the liner to the
oversize liner is used, stamp the amount of oversize on
block and to the engine coolant. Poor contact between
top of the cylinder block adjacent to the liner
the liner and the block bore may be indicated by stains or
counterbore.
low pressure areas on the outer surface of the liner (Fig.
New service liners, standard and oversize, have an
inside diameter of 4.2495 " to 4.2511 "
Examine the outside diameter of the liner for fretting.
Fretting is the result of a slight movement of the liner in
NOTE: Do not modify the surface finish in a new
the block bore during engine operation, which causes
service liner. Since the liner is properly finished
material from the block to adhere to the liner. These
at the factory, any change will adversely affect
metal particles may be removed from the surface of the
the seating of the piston rings.
liner with a coarse, flat stone.
Install the liner in the proper bore of the cylinder block
The liner flange must be smooth and flat on both the top
and measure the inside diameter at the various points
and bottom surfaces. Check for cracks at the flange.
The liner insert must also be smooth and flat on the top
8), which has a dial indicator calibrated in .0001 "
and bottom surfaces. Replace the insert if there is
increments, as it is rather difficult to obtain accurate
evidence of brinelling.
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