SHAFT-IDLER 7T2778 - Caterpillar

Industrial Engine:
C2.2 (S/N: C6M1-331)
Engine News SEBD9618, 10 November 2009, "New Multi Layered Steel Cylinder Head Gasket for Certain C2.2 Engines". Disregard this article. See the article that follows.Description of Change: A new multi layered steel gasket for the cylinder head has been introduced. The new multi layered steel gasket allows improved sealing.Adaptable To: The new 322-7486 Gasket, 322-7487 Gasket and 322-7488 Gasket replaces 308-1910 Gasket and 308-1911 Gasket .Note: Three cylinder head gaskets have been introduced in order to provide a better control of the compression ratio.
Table 1
Selection of Head Gasket for the C2.2 Engine    
Piston Height above Top Face of Cylinder Block     Gasket Thickness     New Part Number for the Cylinder Head Gasket    
0.3 to 0.4 mm (0.01181 to 0.01575 inch)    
1.1 mm (0.043 inch)     322-7488    
0.4 to 0.5 mm (0.01575 to 0.01969 inch)    
1.2 mm (0.047 inch)     322-7487    
0.5 to 0.6 mm (0.020 to 0.024 inch)    
1.3 mm (+0.051 inch)     322-7486    Table 1 shows the correct piston heights for the new multi layered steel cylinder head gaskets.