Cylinder head arrangement for variable valve actuation rocker arm assemblies

A cylinder head assembly compatible with an engine having four adjacent cylinders, with a left end cylinder on a far left side of the engine, a right end cylinder on a far right side of the engine and two middle cylinders, a first one of the middle cylinders being a left middle cylinder and a second one of the middle cylinders being a right middle cylinder, the cylinder head assembly comprising:

• at least one overhead camshaft passing over the left end cylinder;
• an end support on the far left side of the engine supporting a first end of the at least one overhead camshaft;
• a cam tower of the left middle cylinder for supporting the at least one overhead camshaft;
• wherein a portion of the at least one overhead camshaft extending over the left end cylinder is solely supported by a left end support and the cam tower of the left middle cylinder, thereby providing additional clearance for installation of an oversized rocker arm assembly on the left end cylinder.

A cylinder head assembly compatible with an engine having four adjacent cylinders, with a left end cylinder on a far left side of the engine, a right end cylinder on a far right side of the engine and two middle cylinders, a first one of the middle cylinders being a left middle cylinder and a second one of the middle cylinders being a right middle cylinder, the cylinder head assembly comprising:

• at least one overhead camshaft passing over the four adjacent cylinders;
• a right end support on the far right of the engine supporting the at least one overhead camshaft;
• and
• a cam tower of the right middle cylinder for supporting the at least one overhead camshaft,
• wherein a portion of the at least one overhead camshaft extending over the right end cylinder is solely supported by the cam tower of the right middle cylinder and the right end support, thereby providing additional clearance for installation of an oversized rocker arm assembly on the right end cylinder.

A cylinder head assembly compatible with an engine having four adjacent cylinders, with a left end cylinder on a far left side of the engine, a right end cylinder on a far right side of the engine and two middle cylinders, a first one of the middle cylinders being a left middle cylinder and a second one of the middle cylinders being a right middle cylinder, the cylinder head assembly comprising:

• at least one overhead camshaft passing over the four adjacent cylinders;
• a cam tower of the left end cylinder for supporting the camshaft;
• a cam tower of the right end cylinder for supporting the camshaft;
• and
• a camshaft support piece mounted between the two middle cylinders for supporting the camshaft,
• wherein a portion of the at least one overhead camshaft extending over the left middle cylinder and the right middle cylinder is solely supported by the cam tower of an adjacent end cylinder and the camshaft support piece, thereby providing additional clearance for installation of an oversized rocker arm assembly on each of the two middle cylinders.

A cylinder head assembly compatible with an engine having four adjacent cylinders, with a left end cylinder on a far left side of the engine, a right end cylinder on a far right side of the engine and two middle cylinders, a first one of the middle cylinders being a left middle cylinder and a second one of the middle cylinders being a right middle cylinder, the cylinder head assembly comprising:

• at least one overhead camshaft passing over the four adjacent cylinders;
• a cam tower of the left end cylinder for supporting the at least one overhead camshaft;
• and
• a camshaft support piece mounted between the two middle cylinders for supporting the at least one overhead camshaft,
• wherein a portion of the at least one overhead camshaft extending over the left middle cylinder is solely supported by the cam tower of the left end cylinder and the camshaft support piece, thereby providing additional clearance for installation of an oversized rocker arm assembly on the left middle cylinder.

A cylinder head assembly compatible with an engine having four adjacent cylinders, having a left end cylinder on a far left side of the engine, a right end cylinder on a far right side of the engine and two middle cylinders, a first one of the middle cylinders being a left middle cylinder and a second one of the middle cylinders being a right middle cylinder, the cylinder head assembly comprising:

• at least one overhead camshaft passing over the four adjacent cylinders;
• a cam tower of the right end cylinder for supporting the camshaft;
• and
• a camshaft support piece mounted between the two middle cylinders for supporting the at least one overhead camshaft;
• wherein a portion of the at least one overhead camshaft extending over the right middle cylinder is solely supported by the cam tower of the right end cylinder and the camshaft support piece, thereby providing additional clearance for installation of an oversized rocker assembly on the right middle cylinder.