RETAINER 7S8203 - Caterpillar

Type 1 Engines and 9RM Engines
Illustration 1 g00296342
Cylinder and valve location for Type 1 engines and 9RM engines (A) Exhaust valves (B) Inlet valvesNote: Type 1 engines can be identified in two ways. Method 1 refers to Illustration 1. When the valve cover is removed, look at the cylinder head valves. Type 1 engines have two exhaust valves in a row and two inlet valves that are in a row.Method 2 does not require the removal of the valve cover. Refer to the inlet manifold and the exhaust manifold. Type 1 engines have two exhaust ports in a row and two inlet ports that are in a row.Type ... Four cylinder and four strokeCombustion system ... Direct injectionBore ... 100 mm (3.94 inch)Stroke ... 127 mm (5.00 inch)Displacement ... 4 liters (243 in 3)Compression Ratio for turbocharged engine ... 16:1Compression Ratio for naturally aspirated engine ... 16.5:1Number of cylinders ... 4Arrangement of cylinders ... in-lineFiring Order ... 1, 3, 4, 2 Note: The front end of the engine is opposite the flywheel end. The left and right side of the engine are determined from the flywheel end. The Number 1 cylinder is the front cylinder.When the crankshaft is viewed from the front of the engine, the crankshaft rotates in the following direction: ... ClockwiseType 2 Engines and 7BJ Engines
Illustration 2 g00296424
Cylinder and valve location for Type 2 engines and 7BJ engines (A) Exhaust valves (B) Inlet valvesNote: Type 2 engines can be identified in two ways. Method 1 refers to Illustration 2. When the valve cover is removed, look at the cylinder head valves. Type 2 engines alternate the exhaust valves and the inlet valves.Note: Some of the Type 2 7BJ engines may look like the Type 1 engines. When the valve cover is removed, these engines may have two exhaust valves in a row and two inlet valves in a row. This is only a small percentage of the Type 2 7BJ engines.Method 2 does not require the removal of the valve cover. Refer to the inlet manifold and the exhaust manifold. Type 2 engines alternate the exhaust ports and the inlet ports.Type ... Four cylinder and four strokeCombustion system ... Direct injectionBore ... 100 mm (3.94 inch)Stroke ... 127 mm (5.00 inch)Displacement ... 4 liters (243 in 3)Compression Ratio ... 17.25:1Number of cylinders ... 4Arrangement of cylinders ... in-lineFiring Order ... 1, 3, 4, 2Note: The front end of the engine is opposite the flywheel end. The left and right side of the engine are determined from the flywheel end. The Number 1 cylinder is the front cylinder.When the crankshaft is viewed from the front of the engine, the crankshaft rotates in the following direction: ... Clockwise