2004/08/01 Caterpillar


A New Head Gasket is Now Available as Service Replacement {1124}

Usage:

3406E 6BR
Engine:
3406E (S/N: 9NN1-UP; 6BR1-UP; 9WR1-UP)

A new 224-5122 Gasket and 142-2329 Seal is now available as service replacement for the former 153-9653 Cylinder Head Gasket. The new gasket and seal assembly is only availability for the above listed engines that were built after 06November 1997. Table 1 shows the applications that should continue to use the original cylinder head gasket. The former gasket is shown in illustration 1. The new replacement gasket and the molded seal that drops in place is shown in illustration 2. Table 2 lists the applications for the new replacement gaskets.

Table 1
Engine Applications That Were Built Prior to 07November 1997 That Use the 153-9653 Cylinder Head Gasket    
Serial Number Prefix     Application     Serial Number Range    
S/N:9NN     Generator Set Engine     S/N:9NN1-0421    
S/N:6BR     Industrial Engine     S/N:6BR1-860    
S/N:9WR     Marine Engine     S/N:9WR1-0490    



Illustration 1g01096747

(1) 153-9653 Cylinder Head Gasket with molded in place integral seal.




Illustration 2g01097248

(1) 224-5122 Gasket with the drop in place 142-2329 Seal .

Table 2
Engine Applications That Were Built After 06November 1997 Use the 224-5122 Gasket and 142-2329 Seal.    
Serial Number Prefix     Application     Serial Number Range    
S/N:9NN     Generator Set Engine     S/N:9NN422-UP    
S/N:6BR     Industrial Engine     S/N:6BR861-UP    
S/N:9WR     Marine Engine     S/N:9WR491-UP    

This new head gasket is a result of an engineering change to the cylinder block that went into effect on 07November 1997. The original 153-9653 Cylinder Head Gasket should still be used on 3406 Engines that were built prior to 07November 1997 with the change level 03 drawing 137-8472 Cylinder Block Gp. The new 224-5122 Gasket and 142-2329 Seal should still be used on 3406E Engines that were built after 06November 1997 with the change level 04 drawing 137-8472 Cylinder Block Gp.

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