Volvo Penta D2-55 Oil Pan Torque Specs

[Flyboy01]

Does anyone know the torque pattern and specification for the oil pan bolts on a Volvo Penta D2-55 engine?

[a64pilot]

You May never find that answer and if not I’d go with standard torque for that size faster and a criss cross pattern.
The torque is likely to be lower than you May realize, do you have a 30 to 150 inch lb torque wrench?

If no recommended torque can be found, I’d use the grade A recommended torque as an oil pan doesn’t need to be tightened much, there is no stress on it.
https://www.fastenal.com/content/mer...ce%20Guide.pdf

[Dsanduril]

From the Workshop manual

Tightening torque in Nm
Cylinder head*............................................. ............... 100
Main bearings:
upper to lower bearing caps........................................ 52
main bearing caps to cylinder block (hex bolts) .......... 52
rear cap (Allen bolt) .................................................. .. 27
Big end bearings .................................................. ...... 52
End plate/flywheel housing......................................... 25
Flywheel housing .................................................. ..... 25
Flywheel .................................................. .................. 74
Elastic coupling .................................................. ....... 22
Adapter plate to flywheel housing ............................... 22
Strainer, oil pump .................................................. ..... 10
Oil sump .................................................. .................. 10
Drain plug, oil sump .................................................. . 35
Timing gear cover .................................................. .... 10
Crankshaft pulley .................................................. ..... 300
Injection pump .................................................. ......... 15
Bearing block, rocker arm shaft ................................. 33
Valve cover .................................................. .............. 14
Pressure oil pipe (cylinder block – cylinder head) ....... 12
Injectors .................................................. ................... 64
Delivery pipes .................................................. .......... 23
Pressure valve holder ................................................ 42
Reduction valve .................................................. ....... 64
Locking screw (max. fuel volume) .............................. 15
Locking screw (engine speed) .................................... 15
Glowplug .................................................. .................. 18
Oil pressure monitor .................................................. . 18
Coolant temperature monitor ...................................... 27
Oil pressure sensor .................................................. .. 18
Coolant temperature sensor ....................................... 18
* The tightening torque given is the final tightening torque.
The cylinder head is to be tightened in three steps in the correct tightening sequence, see tightening diagram.
Oil the threads of the cylinder head bolts with clean oil.

On our D2-40 they say 11Nm (8.1 lbft), so pretty similar.