This article mainly introduces volvo_penta_md2040 Cylinder head Dismantling
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1. Remove both battery leads. Close the fuel cocks.
2. Close the bottom valve and drain off the water in the sea and fresh water system.
3. Release the hose to the heat exchanger from the sea water pump. Release the exhaust pipe from the exhaust hook.
4. Release the thick rubber hose under the heat ex-
changer.(Note: the hose is filled with refrigerant).
Release the thin hose from the refrigerant pump.
5. MD2010, MD2020remove the drive belt for the al-
ternator/refrigerant pump. Remove the altemator and clamp.
6. Release the relay box from the heat exchanger housing and hang it up.
7. Release the electric cables to the oil pressure relay and to the refrigerant temperature relay and sensor where appropriate).
8. MD2040 remove the cover at the front on the heat exchanger housing's right-hand side. Remove the spacer ring, themostat and rubber seal.
9. Remove the expansion tank complete with heat ex-
changer.
MD2010, MD2020: Remove the spring, themostat and rubber seal from the heat exchanger housing.
10. MD2010, MD2020, MD2030: Remove the induction manifold.
MD2040: Remove the inlet pipe complete with air filter.
11. Release the delivery pipe at the injection pump and injectors. Lift off the delivery pipes together.
Protect the connections from impurities.
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12. Remove the nut at the top of respective injectors and lift off the fuel leak pipe.
13. Unscrew the injectors. Use a long socket,80 mm.
MD2010, MD2020, MD2030=22mm MD2040=27mm.
Remove the copper gaskets under the injectors.
MD2030 Remove the heat shields (3, Fig.10).
MD2010, MD2020, MD2030: Remove the inserts
(4) and the lower copper washers.
14. Release the electric cable to the glow plug. Re-move the conductor rail and unscrew the glow plug.
Fig.11. Dismantling of circulation pump
15. MD2010, MD2020, MD2030Remove the circula-
tion pump.
MD2030: Note. The pump must be released/re-
moved before the cylinder head is released. Thepump can otherwise be broken. Remove the spring and thermostat.
Fig.12. Dismantling of oil pressure pipe(cylinder block-cylinder head/rocker mechanism)
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16. Remove the oil pressure pipe between the cylinder block and cylinder head(rocker mechanism on MD2040).
17. Remove the valve cover (built together with the in-
let pipe on MD2010, MD2020 and MD2030).
Fig.13. Dismanting of rocker mechanism(MD2040)
1. Rocker mechanism 3. Valve caps
2. Pull rods
18. Release the nuts from the rockers' bearing brack-
ets. Remove the rocker mechanism(1, Fig.13) andpull rods(2). Remove the valve caps(3, MD2040)
from the valve stem.
19. Release the cylinder head screws in several sta-
ges.
Note: Begin in the middle of the cylinder head and release the screws in a circle outwards.
Lift off the cylinder head.
