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Volvo Penta MD40

  • Diesel

Engine data

Specifications for Volvo Penta MD40
FuelDiesel
TypeInboard

Autumn and spring plan for Volvo Penta MD40

Here's what to do when hauling out and launching. Always follow the instruction book for your engine.

Autumn

  • Change the engine oil and oil filter11 l API CD (DS); SAE 20W-30 above +10 °C, SAE 10W below +10 °C
  • Replace the fuel filter and water separatorFill the tank to reduce condensation.
  • Winterise the raw water systemLet the engine draw in antifreeze until it comes out of the exhaust, or drain the system as described in the owner's manual.
  • Check the coolant's antifreeze protection
  • Remove the impeller and store it dry
  • Check anodes, belts and hoses
  • Fully charge the batteries and disconnect the negative terminal

Spring

  • Fit the impellerReplace it if it is stiff or cracked.
  • Check belts, hoses, oil level and coolant
  • Check through-hulls, seacocks and hose clamps
  • Charge and connect the batteries, clean the terminals
  • After launching, check that nothing is leakingStart the engine and check that cooling water flows out evenly.
Add to calendarTick off in the service bookTwo reminders a year: in April and in October.

Email me the plan

Service data

Engine oil

Specification
API CD (DS); SAE 20W-30 above +10 °C, SAE 10W below +10 °C
Capacity including filter
11 l
Note
Without engine tilt; 10.5 l at 15° tilt.

Coolant

Volume
21 l
Note
Incl. heat exchanger and separate expansion tank (AQ40/TMD40/MD40).

Valve clearance

Intake
0.4 mm
Exhaust
0.4 mm
Measurement ratio
cold or warm engine

Thermostat & RPM

Thermostat
68 °C
Note
Two wax thermostats. With air vent: opens at 68–72 °C, fully open at 78–82 °C. Without air vent: opens at 74–78 °C, fully open at 84–88 °C.
Idle
600–700 rpm

Tightening torque

Cylinder head bolts
30 / 90 / 130 Nm · stages; retighten after 1 h of test running
Big-end bearing
113 Nm
Oil sump, drain plug
60 Nm
Oil filter (oiled seal)
25 Nm
Injector, retaining nut
23 Nm

Troubleshooting

Troubleshooting by symptom

Exploded views & parts catalogs

  • Shop
    Parts catalog (exploded diagrams) (legacy.marinepartsexpress.com)
    EN · HTML
  • Shop
    Marine Parts Express – exploded views, Volvo Penta diesel (legacy.marinepartsexpress.com)

    Spare parts diagrams by engine model, free to browse.

  • Shop
    Marine-diesel-engine-manuals.com: Volvo Penta (external link)

    Workshop and instruction manuals for AQ, GL/GXi and drives. Some pages can be previewed for free; the full manual must be purchased.

Listings for MD40

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Boats with MD40

2 boat models · A used boat may have had its engine replaced.

Albin Marin Albin 26Hallberg-Rassy 49

Owners' experiences

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Related models

MD1

Inboard

Diesel

MD1B

Inboard

Diesel

MD2

Inboard

Diesel

MD2B

Inboard

Diesel

Service guides

Replacing the impeller →Winterize a boat engine →Find the engine number →

Frequently asked questions about MD40

How much oil does the MD40 take?

MD40 takes about 11 litres of engine oil including the filter. Without engine tilt; 10.5 l at 15° tilt.

What is the valve clearance on the MD40?

Intake 0.4 mm and exhaust 0.4 mm, cold or warm engine.

What fuel does the MD40 use?

Volvo Penta MD40 runs on diesel.

Sources

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