l-17
Basic Engine
l-17
FIG. 31 Valve Spring Compressing Tool
Installation
1.
Cover the valve grooves with plastic tape, slide the new seal
onto the valve stem, remove the tape. NOTE: The exhaust
valves are fitted with umbrella type seals. The intake valves
have the “positive” guide mounted seals which must be
pressed on with a special service tool (Figure 30).
Position the valve spring and retainer over the valve stem.
Compress the valve spring using the special service tool.
Position the valve spring retainer locks in the valve stem
grooves and slowly release the spring to engage the locks in
the retainer. Remove the air hose and adapter.
Lubricate both ends of the push rods with Lubriplate or
equivalent and install them in their respective bores. Install
the rocker arm shaft assembly to the cylinder head, locating
the push rods on the adjusting screws. Tighten the bolts
evenly to specifications.
Adjust valve clearances to specification.
Install the rocker cover with a new gasket and torque the
attaching screws to specification.
Install the spark plugs.
Locate the spark plug leads in the rocker cover clip and
reconnect them to their respective plugs.
Install the air cleaner assembly.
2.
3.
4.
5.
6.
7.
8.
9.
WATER PUMP
Removal
1. Drain the cooling system.
2. Loosen the governor adjusting bolt,s and remove drive belt.
3. Loosen the alternator adjusting and mounting bolts. Pivot the
alternator towards the engine and remove the drive belt.
4. Remove the fan and pulley attaching bolts. Remove the fan
and pulley. .
5. Loosen the clamps and remove the lower hose from the water
Pump*
5. Remove bolts securing water pump to cylinder block and
remove the pump and gasket.
Installation
1. Make sure that the mating faces of cylinder block and pump
are clean.
2. Position the pump and gasket on the cylinder block andsecure
with the attaching bolts.
3. Position lower hose on water pump and tighten the clamp.
4. Position the pulley and fan and secure with bolts. Torque the
bolts to specification.
5. Position drive belt over crankshaft, fan and alternator pulley
and adjust the belt tension to specifications using Tool No.
T63L-8620-A. Tighten the alternator mounting and adjusting
bolt to specifications.
6. Position the governor drive belt to governor and fan pulley.
Adjust the belt to specification. Tighten adjusting bolts.
7.
Refill radiator and install cap. Start the engine and check for
leaks.
CYLINDER FRONT COVER AND TIMING CHAIN,
OR CRANKSHAFT SPROCKETS
Removal
1. Drain the engine coolant by opening the drain cock on the
radiator and removing the drain plug in the cylinder block.
2. Disconnect the radiator hoses at the engine.
3. Remove the radiator.
4. Remove the governor and fan belts and then remove the fan
and the water pump pulley.
5. Remove the water pump.
6. Remove the crankshaft pulley.
7. Remove the oil pan to cylinder front cover and front cover to
block attaching bolts. Use a thin knife to cut the oil pan gasket
flush with cylinder block face prior to separating the cover
from the cylinder block. Remove the front cover.
8. Remove the crankshaft oil slinger. Remove the camshaft
sprocket retainer and bolts.
9. Remove the timing chain tensioner arm. Remove the camshaft
sprocket, and disconnect the timing chain.
10. If crankshaft sprocket is to be removed, use a standard two-
jaw puller (Figure 32).
FIG. 32 Removing Crankshaft Sprocket
FIG. 33 Installing Crankshaft Sprocket