SPRING 2945355 - Caterpillar

Valve Springs
Use Reuse and Salvage Guideline, SEBF8002, "Visual Inspection of Valves, Valve Springs, and Valve Bridges" for procedures to visually inspect the valve springs and procedures to measure the straightness of the valve springs.Specifications for valve springs can be found in Reuse and Salvage Guidelines, SEBF8034, "Valve and Valve Spring Specifications".Valves
Use Reuse and Salvage Guideline, SEBF8002, "Visual Inspection of Valves, Valve Springs, and Valve Bridges" for procedures to visually inspect the valves. Use a 5P-6518 Parts Reusability Fixture Gp or a 6V-7059 Micrometer (MULTIPLE ANVIL) with a 6V-2034 Micrometer Adapter in order to measure the valve lip thickness. Refer to Special Instruction, SMHS6998, "Instructions For The Use Of 5P6518 Fixture Group - Parts Reusability" for more information.Specifications for valves can be found in Reuse and Salvage Guidelines, SEBF8034, "Valve and Valve Spring Specifications".Note: Coat the intake and the exhaust valve stems with engine lubricant prior to installation in the cylinder head.Vacuum Test for Valves
Perform a vacuum test after the head is assembled. Refer to Reuse and Salvage Guidelines, SEBF8162, "Procedure to Measure and Salvage Cylinder Head Assemblies and Related Components" for methods and procedures to use the vacuum test on valves.Valve Recession and Projection
Illustration 14 g02173617
(G) Valve Recession
Illustration 15 g02173680
(H) Valve ProjectionValve recession and projection are measured from the combustion area of the cylinder head to the valve head when the valve is closed. Increased valve recession or decreased valve projection can be caused by wear of the valve face or wear of the sealing surface on the insert.
Table 11
Engine Model     Intake/Exhaust     Part Number     Minimum Valve Recess     Maximum Valve Recess    
C7     Intake     145-7390    
1.09 mm (0.043 inch)    
1.71 mm (0.067 inch)    
157-7129
252-7801
Exhaust 157-7130    
147-8211
C9     Intake     241-8382    
1.19 mm (0.047 inch)    
1.81 mm (0.0713 inch)    
262-2957
187-4123
1.18 mm (0.046 inch)
1.8 mm (0.071 inch)    
163-2442
Exhaust 241-8383    
1.19 mm (0.047 inch)    
1.81 mm (0.0713 inch)    
255-8676
188-3122
2.79 mm (0.110 inch)    
3.41 mm (0.134 inch)    
C10 and C12     Intake     157-0672    
2.19 mm (0.086 inch)    
2.81 mm (0.111 inch)    
192-9213
Exhaust 157-0671    
1.09 mm (0.043 inch)    
1.71 mm (0.067 inch)    
133-7029
C11 and C13     Intake     252-7802    
2.59 mm (0.102 inch)    
3.21 mm (0.126 inch)    
224-3028
Exhaust 248-1467    
1.34 mm (0.053 inch)    
1.76 mm (0.069 inch)    
224-3030
C15 through C32     Intake     236-5605    
2.17 mm (0.085 inch)    
2.83 mm (0.111 inch)    
153-7023
Exhaust 289-9231    
1.19 mm (0.047 inch)    
1.81 mm (0.071 inch)    
153-7024