C-10, C-12, 3176C, and 3196 Bolts for the Front Housing{1151} Caterpillar

Machine Engines:

3176C (S/N: 7ZR1-UP; 3PD1-UP)

C-12 (S/N: JAC1-UP)

3196 (S/N: 5ED1-UP; 6AR1-UP)

Industrial Engine:

C-10 (S/N: BCX1-UP)

3176C (S/N: 2AW1-UP)

C-12 (S/N: BDL1-UP)

3196 (S/N: 1DW1-UP)

Marine Engines:

3176C (S/N: 6BW1-UP)

C12 (S/N: 9HP1-UP)

3196 (S/N: 2XR1-UP)

Truck Engines:

C-10 (S/N: 2PN1-UP; 3CS1-UP; 8YS1-UP)

C-12 (S/N: 2KS1-UP; 8YF1-UP; CPN1-UP; 9SM1-UP; 1YN1-UP; CPD1-UP; 9NS1-UP)

Introduction

Do not perform any procedure in this Special Instruction until you read this information and you understand this information.

The front of the engine blocks have been modified. This modification requires the use of different bolts that attach the front housing to the engine block. Use Table 1 to determine the Type of bolt that will be used. The ""Type 1" " bolt is 30 mm (1.18 inch) in length. The ""Type 2" " bolt is 40 mm (1.57 inch) in length. The ""Type 2" " bolt is used due to a deeper counterbore in the engine block. The use of the incorrect bolt may cause damage to the threads. The use of the incorrect bolt will not properly tighten the front housing to the engine block.

Determining Your Type of Engine

Use Table 1 to identify your type of engine. If your engine is a Type 1 proceed to ""Type 1" ". If your engine is a Type 2 proceed to ""Type 2" ". If you have a remanufactured engine then proceed to ""Remanufactured Engines" ". The following illustrations will provide added information on the installation of the front housing.

Note: The 216-4781 Gasket Kit is available for the engines that are listed in Table 1. The gasket kit will include the following components: 211-2822 Gasket , 204-0712 Bolt and 204-0714 Bolt .

Type 1

Illustration 1	g00856488
6V-2317 Bolt

Illustration 2	g00856491
204-0712 Bolt

The two bolts (Type 1) are 30 mm (1.18 inch) long. Marks on the head of the bolt represent the grade of the bolt. These markings can be seen in Illustration 1 and 2. The 6V-2317 Bolt is replaced by 204-0712 Bolt . The 204-0712 Bolt has a torque value of 40 ± 8 N·m (30 ± 6 lb ft). 13 bolts are required for the installation of the front housing.

Type 2

Illustration 3	g00856344
204-0714 Bolt

The 204-0714 Bolt is 10 mm (0.39 inch) longer than the 204-0712 Bolt . The longer bolt is needed due to a deeper counterbore and the tapped hole. Do Not use the 204-0712 Bolt or the 6V-2317 Bolt . This could result in damage to the threads. The torque on the 204-0714 Bolt is 35 ± 8 N·m (26 ± 6 lb ft). 13 bolts are required for the installation of the front housing.

Remanufactured

Illustration 4	g00838008
Depth of counterbore (Y) requires engines to use 204-0712 Bolt .

Illustration 5	g00838007
Depth of counterbore (Z) requires engines to use the 204-0714 Bolt .

Remanufactured engines require special attention in order to use the correct bolt. The counterbore in the engine block must be measured in order to determine the bolts that will be used. If your engine block has a counterbore (Y) of 5 mm (0.20 inch), refer to ""Type 1" ". If your engine block has a counterbore (Z) of 15 mm (0.60 inch), refer to ""Type 2" ".

Note: The face of the housing and the face of the block must be clean prior to installation.

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Illustration 6	g01361647
Typical example

1. Apply a bead of 8T-9022 Silicone Gasket to the lower edges (1) of the cylinder block.

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Illustration 7	g01361654
Typical example

2. Install gasket (2). Apply a bead of 8T-9022 Silicone Gasket to lower edges (3) of gasket (2) .

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Illustration 8	g01361656

Note: Verify that the correct bolts are being used before proceeding to Step 3.

3. 1. The 40 mm (1.57 inch) Bolt ( 204-0714 Bolt ) requires a torque value of 35 ± 8 N·m (26 ± 6 lb ft). Thirteen bolts (4) are required to install the front housing (5) .

   2. The 30 mm (1.18 inch) Bolt ( 204-0712 Bolt ) requires a torque value of 40 ± 8 N·m (30 ± 6 lb ft). Thirteen bolts (4) are required to install the front housing (5) .

4. Remove the excess 8T-9022 Silicone Gasket from the following locations: cylinder block, front housing and oil pan. Use a suitable sized flat tool such as a putty knife in order to remove the excess sealant.