TM 5-3805-281-24-2
Cylinder Block, Liners, Pistons, and Rods
MEASURE CYLINDER BLOCK
Refer to the appropriate groups for a more detailed
If any one camshaft follower bore is not within
description of the features being measured. Compare
specification, install a new cylinder block.
measurements with specifications given below.
3. Measure camshaft bore diameter at all locations
1. Assemble and measure main and thrust bearing
and record readings. Compare measurements with
bores. Compare measurements with specifications
specifications given in chart below:
given below:
Camshaft Bushing--Specification
Main Bearing--Specification
Installed ID .......................................................... 67.076--67.102 mm
(2.6408--2.6418 in.)
Bore ID without Bearing .................................... 101.651--101.67 mm
Bore in Block ...................................................... 69.987--70.013 mm
(4.0020--4.0030 in.)
(2.7554--2.7564 in.)
Surface Width ......................................................... 36.28--36.78 mm
Minimum Runout of Bore in............................. 0.038 mm (0.0015 in.)
(1.428--1.448 in.)
Block
Journal Clearance.................................................. 0.0063--0.115 mm
Thrust Bearing--Specification
(0.0025--0.0045 in.)
Bore ID without Bearing .................................... 101.651--101.67 mm
If camshaft bushing bore diameter in block is more
(4.0020--4.0030 in.)
Surface Width (No. 5 Main).................................... 37.44--37.54 mm
than specified, install a new cylinder block.
(1.474--1.478 in.)
Overall Cap Width .................................................. 41.81--42.31 mm
4. Measure cylinder block top deck flatness using
(1.646--1.666 in.)
D05012ST Precision Straightedge and feeler
gauge. Resurface as required.
If any main or thrust bearing cap assembled I.D. is not
within specification, blank (generic) bearing caps are
Cylinder Block Top Deck--Specification
available and must be line bored to specification by a
qualified machine shop. (See Group 15
Out-of-Flat.......................................... 0.10 mm (0.004 in.) over entire
CRANKSHAFT, MAIN BEARINGS, AND FLYWHEEL.)
length or width
Straightness .......................................... 0.025 mm (0.001 in.) per any
305 mm (12.0 in) of Length
2. Measure camshaft follower bore diameter at all
Maximum Wave Depth ..................... 2.0 micrometers (79 micro-inch)
bore locations.
Minimum Main Bearing Bore ......................... 352.35 mm (13.872 in.)
Centerline-to-Top Deck
Camshaft Follower--Specification
Distance
ID in Block .......................................................... 17.384--17.440 mm
(0.6845--0.6865 in.)
OD (New)................................................................ 17.33--17.35 mm
(0.682--0.683 in.)
Clearance......................................................... 0.114 mm (0.0045 in.)
Continued on next page
RG,RG34710,1135
1923OCT971/2
