TRUCK SERVICE MANUAL
2. Lift cylinder block and secure to block mounting plate
Service Tools (Or Equivalent) Required
1. Turn cylinder block upside-down.
Dial Gauge Attachment
2. Using a clean rag, wipe main bearing bores and main
Blow-By Checking Tool
bearing shells clean. Lay upper main bearing shells in
block. All upper main bearing shells are grooved and
drilled for lubrication. No's. 1, 3 and 5 are alike and
"O" Ring Loader
No's. 2, 4 and 6 are alike; No. 7 shell has oil groove off-
Seal And Sleeve Driver
center. The wide portion of the shell is installed toward
flywheel end of block. Groove on each shell for dowel
ring must match with counterbore at capscrew hole on
Valve Spring Spray Nozzle
3. Install main bearing ring dowels. Coat upper main
bearing shells thoroughly with clean lubricating oil.
(80 deg. Tilt Engine)
4. Lift crankshaft into position, using hooks protected
Rocker Lever Actuator
rubber hose or a rope sling at two crank throws. Check
Seal Mandrel (Teflon Seal)
Seal Pilot (Teflon Seal)
rear counterweight of crankshaft to see if oversize thrust
rings are to be used and where installed, front or rear.
Desirable (Or Equivalent) Service Tools
Roll upper thrust rings into position, babbitt or grooved
Engine Support Stand
Pulley Assembly Tool
sides next to crankshaft flanges. Upper thrust rings are
Drill Reamer Fixture
not doweled to block; lower halves are doweled to cap.
Engine Rebuild Stand
5, Coat lower main bearing shells and crankshaft
Torque Wrench Adapter
surface, with clean lubricating oil. Snap into place over
Piston Ring Expander
crankshaft. 6. Install lower thrust rings, rings must be
Engine Lifting Fixture
located over dowels in No. 7 main bearing cap.
Block Mounting Plate
7. Install main bearing caps with numbers corresponding
to those stamped on block on camshaft side of engine.
Cylinder Liner Hold-Down Tool
8. Lubricate main bearing capscrew threads with clean
engine lubricating oil, coat under head of capscrew and
lockplates with SAE 140W gear lubricant and install
None Smoke Meter (order from
lockplates, start each capscrew; tighten alternately and
slowly, to set caps into position.
9. Tighten main bearing capscrews by template method.
Standard Tools - Obtain Locally
a. Tighten main bearing capscrews to 140 to 150 ft-lbs
0-150 Inch-pound Torque Wrench
[19.4 to 20.7 kg ml .
0-250 Foot-pound Torque Wrench
0-600 Foot-pound Torque Wrench
b. Continue to tighten capscrews to 300 to 310 ft-lbs
Dial Indicator (Starret No. 196A)
[41.5 to 42.9 kg ml to "set" shells, caps and lockplates.
Dial Indicator Sleeve (Starret No. 196-
c. Loosen completely; retighten to 140 to 150 ft-lbs [19.3
to 20.7 kg ml .
Manometer (Mercury or Water)
d. Tighten both capscrews on each cap alternately and
evenly to 300 to 310 ft-lbs [41.5 to 42.9 kg ml torque.
Note: There are two torque methods which are
Engine and/or Chassis Dynamometer
Hoist (Power or Chain)
Template and Torque method. Refer to Groups 1 and 8.
10. Attach dial indicator gauge securely to rear of
cylinder block with contact point of gauge resting on
crankshaft flange end face.
With a pry bar, pry
Mount Cylinder Block To Engine Stand
crankshaft toward front of engine. Remove pry bar and
1. Secure ST-805 Block Mounting Plate to ST-548 Engine
set gauge at "O."
Rebuild Stand. Secure water header cover plate adapter and
11. Pry crankshaft toward rear of engine. Total gauge
adapter plate to cylinder block.
reading should be 0.007 to 0.017 inch [0.18 to 0.43 mm],