CAP 4N0102 - Caterpillar

2. On 6.25" Bore engines, the current recommendation is that the former cylinder heads not be used on the spacer plate block because of possible oil leakage at the gasket on the camshaft follower side of the cylinder head. If desired, dealers and customers can use the former cylinder heads with inserts installed in the water director counterbores, but the holes for added head bolts along the camshaft follower side can not be drilled in these heads. Since the new gaskets must be used with the spacer plate, but the new bolts can not be added with former heads, gasket compression will be less which can permit leakage of oil along this side of the head.3. On 6.25" Bore engines, former cylinder liners can not be used with spacer plate blocks. Only the former head gasket can be used with the former liners, and this gasket can not be used with the spacer plate block.