Yanmar 3TNV82A-B Service Manual page 183

4-Valve Cylinder Head
CAUTION
Remove or install the high-pressure fuel
injection lines as an assembly whenever
possible. Disassembling the
high-pressure fuel injection lines from
the retainers or bending any of the fuel
lines will make it difficult to reinstall the
fuel lines.
3. Disconnect the fuel return hose
(Figure 6-40, (2)) from the cylinder head.
4. Disconnect the hoses (Figure 6-40, (3)) from
the cold start device on the fuel injection pump.
This cooling water pipe is not used in
electronically controlled engines 4TNV84T-Z,
4TNV98-Z, 4TNV98-E and 4TNV98T-Z.
Instead, these engines use a solenoid valve
and connecting coupler but, when removing the
cylinder head only, it is not necessary to remove
the connecting coupler.
5. Remove the turbocharger-to-intake manifold
hose (Figure 6-41, (1)) (if equipped).
6. Disconnect the electrical wire from the intake air
heater (Figure 6-41, (12)).
7. Remove the intake manifold bolts
(Figure 6-41, (11)). Remove the intake
manifold (Figure 6-41, (10)). Discard the intake
manifold gasket (Figure 6-41, (9)).
8. Disconnect the turbocharger oil supply
(Figure 6-41, (2)) and the return lines
(Figure 6-41, (4)) (if equipped).
9. Remove the exhaust manifold bolts
(Figure 6-41, (7)). Remove the exhaust
manifold (Figure 6-41, (6)) with the
turbocharger attached. Discard the exhaust
manifold gasket. (Figure 6-41, (5)).
TNV DI Service Manual
(1)
0000047en
(12)
10. Remove the engine coolant pump. See
Disassembly of Engine Coolant Pump on
page 8-10.
(2)
(3)
(5)
(4)
(11)
(10) (9)
Figure 6-41
ENGINE
(6)
(7)
(8)
0001860
6-51