RING-RETAINING 6K7909 - Caterpillar

ALL 3204 AND 3208 TURBOCHARGED ENGINESReference: LITERATURE: Service manual Parts BookThis cylinder head group is the replacement for the 3200 Series DIT cylinder head groups used on the above engines; however, it cannot be used on 1100, 3100, 3204PC, 3204DINA and 3208DINA Engines. The cylinder head group is shipped with the intake and exhaust valves, valve springs, washers, locks and retainers installed. Additional parts that are sent with the cylinder head group are for use in specific applications. Not all of the parts will be needed to install the cylinder head on a specific engine. This instruction gives the installation information needed for the cylinder head group and for the additional parts. Put 5P3413 Pipe Sealant on all threaded plugs and cup plugs used in the cylinder head installation.All 3200 Series Turbocharged Engines
The mounting holes in the cylinder head at location (A), used for a lifting eye bracket (or for other brackets), may be a different size than the original head; therefore rework and extra parts may be needed. Cylinder heads on earlier engines had bracket mounting holes with 3/8-16-2B threads. Later cylinder heads had bracket mounting holes with 1/2-13-2B threads.(1) If a cylinder head of the earlier type is replacing a later cylinder head, the replacement cylinder head will have 3/8"-16-2B threads in the mounting holes. Install the bracket with S1594 Bolts and 5M2894 Washers.(2) If a cylinder head of the later type is replacing an earlier cylinder head, the holes in the lifting eye bracket, and other brackets, must be enlarged to 13.0 mm Ø (0.53" Ø). Use 6H1717 Bolts and 5P8245 Washers to install the bracket on the replacement cylinder head.3208 Turbocharged Engines
(1) If the cylinder head is to be used on the left side of the engine, install a 9L7657 Cup Plug at location (A). If the cylinder head is to be used on the right side of the engine, install a 9L7657 Cup Plug at location (B). On all cylinder heads, install a 7H3181 Hex Countersunk Head Plug at location (C). Install 5M6213 Plugs at locations (D) as necessary. Due to the different size holes in earlier and later cylinder heads, install either a 2B858 or a 5M6214 Plug in the opening at (E).(2) Put the cylinder head in position on the engine. Put engine oil on the threads of the cylinder head bolts and install the bolts in their correct positions. Tighten the bolts in sequence and to the torque shown in the Service Manual.3204 Turbocharged Engines
Because two different water lines groups have been used on these engines, it may be necessary to obtain some additional parts. See Step 1 and the illustrations for the parts needed. (1) Install a 7H3171 Hex Countersunk Head Plug at location (A), a 9L7657 Cup Plug at location (B), and 5M6213 Plugs at locations (C) as necessary.(2) New vent line parts (not part of the cylinder head group) will be needed if the threaded hole at location (D) is a different size than the hole