3126B Marine Engine Caterpillar


Exhaust Manifold - Remove and Install

Usage:

3126B 3GS

Removal Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     138-7573     Link Bracket     2    

Start By:

  1. Remove the heat exchanger. Refer to Disassembly and Assembly, "Heat Exchanger - Remove".
  2. Remove the water temperature regulator housing. Refer to Disassembly and Assembly, "Water Temperature Regulator - Remove and Install".
  3. Remove the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove".

------ WARNING! ------

Personal injury can result from hot coolant, steam and alkali.

At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.

Remove cooling system pressure cap slowly to relieve pressure only when engine is stopped and cooling system pressure cap is cool enough to touch with your bare hand.

Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns.

Cooling System Coolant Additive contains alkali. Avoid contact with skin and eyes.

----------------------


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.



NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.

Dispose of all fluids according to local regulations and mandates.





    Illustration 1g00646432

  1. Remove connector (1) .

  1. Loosen hose clamp (2) .



    Illustration 2g00646534

  1. Loosen hose clamp (3) and remove the hose.



    Illustration 3g00646541

  1. Remove bolt (4) .



    Illustration 4g00646545

  1. Fasten a suitable lifting device and Tool (A) to the exhaust manifold. The exhaust manifold weighs approximately 40 kg (87 lb).

  1. Remove fifteen bolts (5) from exhaust manifold (6) .



    Illustration 5g00646554

  1. Remove gasket (7) and exhaust manifold (6) from the cylinder block.

Installation Procedure

Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A     138-7573     Link Bracket     2    


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


  1. Inspect the condition of the gasket. Replace the gasket, if necessary.



    Illustration 6g00647294

  1. Fasten a suitable lifting device and Tool (A) to the exhaust manifold. The exhaust manifold weighs approximately 40 kg (87 lb).



    Illustration 7g00646554

  1. Position gasket (7) and exhaust manifold (6) on the cylinder block.



    Illustration 8g00647299

  1. Install bolts (5) that fasten exhaust manifold (6) to the cylinder head.



    Illustration 9g00848766

  1. Tighten bolts 1 through 12 in a numerical sequence. Tighten bolts 1 through 12 to a torque of 4 ± 1 N·m (35 ± 9 lb in).

  1. Tighten bolts 1 through 12 in a numerical sequence. Tighten bolts 1 through 12 to a torque of 55 ± 5 N·m (41 ± 4 lb ft).



    Illustration 10g00646541

  1. Install bolt (4) .



    Illustration 11g00646534

  1. Tighten hose clamp (3) .



    Illustration 12g00646432

  1. Install connector (1) .

  1. Tighten hose clamp (2) .

End By:

  1. Install the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Install".
  2. Install the water temperature regulator housing. Refer to Disassembly and Assembly, "Water Temperature Regulator - Remove and Install".
  3. Install the heat exchanger. Refer to Disassembly and Assembly, "Heat Exchanger - Install".

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