C175-16 Marine Engine Caterpillar

Removal Procedure

Start By:

1. Remove the starting motors. Refer to Disassembly and Assembly, "Electric Starting Motor - Remove" or Disassembly and Assembly, "Air Starting Motor - Remove".

2. Remove the fuel filter base. Refer to Disassembly and Assembly, "Fuel Filter Base - Remove".

3. Remove the fuel pump. Refer to Disassembly and Assembly, "Fuel Pump - Remove".

4. Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove".

5. Remove the engine oil cooler. Refer to Disassembly and Assembly, "Engine Oil Cooler - Remove".

6. Remove the engine oil scavenge pump. Refer to Disassembly and Assembly, "Engine Oil Scavenge Pump - Remove".

Show/hide table

Illustration 1	g01212026

Show/hide table

Illustration 2	g01212278

1. Remove bolts (1) and remove side cover (2). Repeat for the remaining side covers on both sides of the engine.

2. Remove bolt (5) from each side of the engine and install Tooling (G).
   Show/hide table

   Illustration 3	g01212105

3. Install Tooling (A) onto the studs for the crankshaft main bearing cap. Tighten the threaded collar of Tooling (A). Loosen the threaded collar of Tooling (A) by 1 1/2 turns. Attach Tooling (B) onto Tooling (A). Attach Tooling (B) onto Tooling (C). Attach Tooling (C) onto Tooling (D). Apply approximately 135 MPa (19580 psi) of pressure to Tooling (A). Use the drive on Tooling (A) in order to loosen the nuts for the crankshaft main bearings. Rotate the drive on Tooling (A) by approximately three turns. Release the pressure on Tooling (A). Remove Tooling (A).
   Show/hide table

   Illustration 4	g01212274

4. Remove crankshaft main bearing nuts (3). Remove plate (4).
   Show/hide table

   Illustration 5	g01212288

5. Slide down crankshaft main bearing cap (6) on the studs. Remove crankshaft main bearing (7) from crankshaft main bearing cap (6).

6. Install Tooling (F) in order to remove the upper crankshaft main bearing. If necessary, use Tooling (E) in order to rotate the crankshaft and remove the upper crankshaft main bearing.

Installation Procedure

1. Lubricate main bearing studs (8) with clean engine oil. Use Tooling (H) and a suitable torque wrench in order to check the torque on main bearing studs (8). Tighten main bearing studs (8) to a torque of 100 ± 20 N·m (74 ± 15 lb ft).

   Note: Be sure that the back of the main bearing is clean and free from oil.

2. Lightly lubricate the upper crankshaft main bearing with clean engine oil. If necessary, use Tooling (E) in order to rotate the crankshaft and remove main bearing. Use Tooling (F) and install the upper crankshaft main bearing into the cylinder block.
   Show/hide table

   Illustration 6	g01212288

3. Lightly lubricate crankshaft main bearing (7) with clean engine oil. Install crankshaft main bearing (7) into crankshaft main bearing cap (6). Lift crankshaft main bearing cap (6) into position.
   Show/hide table

   Illustration 7	g01212278

4. Lubricate bolts (5) with clean engine oil. Remove Tooling (G). Install bolts (5) finger tight.
   Show/hide table

   Illustration 8	g01212274

5. Lubricate the main bearing studs with clean engine oil. Install plate (4). Install nuts (3) for the crankshaft main bearings finger tight.
   Show/hide table

   Illustration 9	g01212278

6. Start at the front of the engine and tighten bolts (5) on the right side of the cylinder block to a torque of 100 ± 20 N·m (74 ± 15 lb ft).
   Show/hide table

   Illustration 10	g01212105

   Note: Show 14 to 15 threads or 28 to 30 mm of protrusion of the stud above the nut before tension is applied. Show 16 to 17 threads or 32 to 34 mm of protrusion of the stud above the nut after tension is applied.

7. Install Tooling (A) onto the studs for the crankshaft main bearing cap. Tighten the threaded collar of Tooling (A). Attach Tooling (B) onto Tooling (A). Attach Tooling (C) onto Tooling (D). Apply approximately 135 MPa (19580 psi) of pressure to Tooling (B). Use the drive on Tooling (A) in order to tighten the nuts for the crankshaft main bearings. Release the pressure on Tooling (A). Reapply approximately 135 MPa (19580 psi) of pressure to Tooling (A). Recheck nuts (3) for tightness. Remove Tooling (A).
   Show/hide table

   Illustration 11	g01212278

8. Start at the front of the engine and tighten bolts (5) on the left side of the cylinder block to a torque of 100 ± 20 N·m (74 ± 15 lb ft).
   Show/hide table

   Illustration 12	g01212278

9. Start at the front of the engine and tighten bolts (5) on the right side of the cylinder block to a torque of 530 ± 70 N·m (391 ± 52 lb ft).

10. Start at the front of the engine and tighten bolts (5) on the left side of the cylinder block to a torque of 530 ± 70 N·m (391 ± 52 lb ft).
    Show/hide table

    Illustration 13	g01212026

11. Install side cover (2). Install bolts (1). Repeat for the remaining side covers on both sides of the engine.

End By:

1. Install the engine oil scavenge pump. Refer to Disassembly and Assembly, "Engine Oil Scavenge Pump - Install".

2. Install the engine oil cooler. Refer to Disassembly and Assembly, "Engine Oil Cooler - Install".

3. Install the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Install".

4. Install the fuel pump. Refer to Disassembly and Assembly, "Fuel Pump - Install".

5. Install the fuel filter base. Refer to Disassembly and Assembly, "Fuel Filter Base - Install".

6. Install the starting motors. Refer to Disassembly and Assembly, "Electric Starting Motor - Install" or Disassembly and Assembly, "Air Starting Motor - Install".