Engine JAC HFC4DA1-2C. Instruction - page 12
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
47
n. Install and tighten the bolts and nuts of water pump in
diagonal manner to 25±5N.m.
o. Install the timing gear chamber cover subassembly
and attach and tighten the fixing bolts of gear
chamber cover to 20±5 N.m.
p. Torque for hexagon socket fixing bolt: 60±10 N.m.
q. Install the damping pulley and attach and tighten the
fixing bolts of damping pulley to 210±15 N·m.
6. Install the cylinder head and related
accessories.
a. Check whether the upper surface of cylinder block is
normal and the cylinder gasket is normal and install
the cylinder gasket.
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
48
b. Install the cylinder head onto the cylinder block.
c. Immerse the thread portion of cylinder head bolts into
oil and then install into the cylinder head and
pre-tighten.
d. Tighten the cylinder head bolts by steps from the
center to two sides as per the specified sequence:
65N.m→85N.m→105N.m
e. Install the thermostat housing and water outlet
assembly and tighten the fixing bolts and hexagon
socket fixing bolts.
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
49
7. Install the intake manifold and
related accessories.
a. Use hexagon flange bolts to fix the fuel rail bracket
onto the cylinder block and tighten to 37.5±9.5N.m.
b. Use hexagon flange bolts to install the fuel rail
assembly with rail pressure sensor onto the fuel rail
bracket and tighten to 25±5N.m.
c. Install the intake manifold gasket.
d. Insert the oil dipstick into the cylinder block and
tighten the fixing bolts and nuts of intake manifold as
per the specified sequence.
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
50
e. Install the intake manifold and install and tighten the
fixing bolts, plain washers, and fixing nuts.
f. Install the intake manifold harness bracket and intake
pressure and temperature sensor.
8. Install the push rod rocker arm
subassembly and adjust the valve
clearance.
a. Dip the tip of push rod with oil and install into the
cylinder head. Install the rocker arm and pre-tighten
the rocker arm support bolts.
b. Tighten the support bolts by steps. Sequence: 2-3-4-1;
Torque: 55±5N.m