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| Illustration 1 | g01232897 |
Typical example (1) Coolant outlet line from the turbocharger (2) Regulator housing (3) Coolant inlet line to the turbocharger bearings (4) Water manifold (5) Cylinder head (6) Coolant line to block (7) Oil cooler (8) Coolant inlet line to the aftercoolers (9) Jacket water pump (10) Bypass line | |
Coolant goes into the water pump inlet and flow is divided at the outlet of the water pump. Part of the coolant flow is sent to the aftercooler through line (8). The remainder of the coolant goes through the oil cooler (7) .
On the 3516 engine, coolant enters the aftercoolers through an elbow between the aftercoolers. The coolant goes through each aftercooler core and into a passage in the front and the rear of the block.
On the 3508 engine and the 3512 engine, coolant enters the aftercooler through an elbow at the front of the aftercooler. The coolant goes through the aftercooler core and into the block through an elbow at the rear of the block.
The coolant from the oil cooler flows into the water jacket of the block at the right rear cylinder. The coolant goes to both sides of the block through distribution manifolds that are connected to the water jacket of all the cylinders. The main distribution manifold is located just above the main bearing oil gallery.
The coolant flows upward through the water jackets and around the cylinder liners from the bottom to the top. The hottest temperature is near the top of the cylinder liners. The water jacket is made smaller near the top of the cylinder liners. The smaller passageway causes the coolant to flow faster for better cooling of the cylinder liners. Coolant from the top of the cylinder liners goes into cylinder head (5) which sends the coolant around the parts which have the hottest temperature. Coolant then goes to the top of the cylinder head. Coolant flows through an elbow. There is an elbow at each cylinder head. Coolant goes into a water manifold (4) at each bank of cylinders. Coolant goes through the manifold to regulator housing (2) .
Regulator housing (2) has an upper flow section and a lower flow section. The regulator housing uses four temperature regulators. The sensing bulbs of the four temperature regulators are in the coolant in the lower section of the housing. Before the regulators open, cold coolant is sent through the bypass line back to the inlet of jacket water pump (9). As the temperature of the coolant increases, the regulators start to open and coolant flow in bypass line (10) is restricted. Some coolant is sent through the outlets to the source for the jacket water coolant. Also, coolant flows from the upper regulator housing to the bearing housing for the turbocharger (3). The coolant is then returned to the source for the jacket water coolant.