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Cooling system
from Volvo Penta TD1030ME VE TWD1030ME TWD1031VE TAD1031GE TAD1231GE TWD1231VE TAD1232GE Workshop Manual
Design and function
Cooling system
The coolant is pumped round the system by a gear driven pump and is led via a distribution gallery into the cylinder block.
After cooling the cylinder heads and cylinder liners, the coolant reaches the thermostat housing. Depending on coolant temperature (thermostat opening) it is led either back to the engine block or to the radiator through the top radiator hose.
From the thermostat housing, the coolant is also distributed to the oil cooler and the charge air cooler (TWD). The radiator is of a new type with embossed tubes to give better heat transition and higher cooling capacity. A pressure valve in the expansion tank cap regulates pressure in the cooling system.
The pressure valve opens at approx. 70 kPa (10 psi).
Coolant pump
The TAD/TWD is equipped with a gear driven high flow coolant pump.
The high flow pump is mounted on engines where particularly high demands are made on cooling capacity. The coolant seal is made in one piece using carbon/ ceramics as the sealing element.
Thermostat, thermostat housing
Thermostat opening temperature: See Workshop Manual, Technical Data for each engine concerned.
