Quantcast Measure connecting rod bolt stretch.

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TM 55-1905-223-24-1
(6) Move fixture to second bolt. Record reading as "Second Bolt Zero."
Remove fixture.
(7) Tighten both bolts using the procedure in Table 3-5 .
(8) Install fixture on first bolt. Record reading as "First Bolt Tight."
(9) Install fixture on second bolt. Record reading as "Second Bolt Tight."
Remove fixture.
(10) Compute bolt stretch for each bolt by subtracting "Bolt Zero" reading from "Bolt Tight" reading. Ensure
bolt stretch is between 0.0135 inch (0.343 mm) and 0.0185 inch (0.470 mm).
(11) If bolt stretch is greater than specification, replace bolt and repeat procedure.
(12) If bolt stretch is less than specification, perform the following:
(a) Loosen both bolts.
CAUTION
Tightening a bolt that was within specification to a greater torque value
can result in bolt failure and engine damage.
(b) Tighten bolts using the procedure in Table 3-4, except that in Step 3
advance the bolt that was less than specification to 270 ft-lb (365
N ).
m
(c) Repeat the "Bolt Tight" measurement and compute bolt stretch.
(d) If bolt stretch is still less than specified, the connecting rod and
the bolt must be replaced.
(13) Check the connecting rod to crankshaft side clearance. The tightened
connecting rods should be free tomove sideways on the crank shaft
journal. Side clearance on a pair of connecting rods is 0.012 to 0.020
inch (0.30 to 0.51 mm) between rods or between the rods and the
crankshaft (FIG. 3-28).
(14) Replace cylinder head, paragraph 2-34.
(15) Replace the handhole cover, paragraph 2-35.
(16) Check engine for normal operation.
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