TM 5-3895-382-24
Disassembly and Assembly
Section
Engine Design
SMCS Code: 1000
Type 1 Engines and 9RM Engines
Illustration 1
Cylinder and valve location for Type 1 engines and 9RM engines.
(A) Exhaust valves
(B) Inlet valves
NOTE: Type 1 engines can be identified in two ways. The
first method 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.
The second method 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 stroke
Combustion system ................................................Direct injection
Nominal Bore .................................................100 mm (3.937 inch)
Stroke.................................................................127 mm (5.00 inch)
Capacity ..................................................................4 liters (243 in 3)
Compression Ratio ....................................................................16:1
Number of cylinders ........................................................................ 4
Arrangement of cylinders .......................................................in-line
Firing Order.......................................................................... 1, 3, 4, 2
Valve Lash
Inlet valve .................................................0.20 mm (.008 inch)
Exhaust valve ...........................................0.45 mm (.018 inch)
When the crankshaft is viewed from the front of the engine, the
crankshaft rotates in the following direction: ............... Clockwise
When the camshaft is viewed from the front of the engine, the
camshaft rotates in the following direction: ................. Clockwise
NOTE: The front end of the engine is opposite the
flywheel end. The left side and the right side of
the engine are viewed from the flywheel end. The
No. 1 cylinder is the front cylinder.
Type 2 Engines and 7BJ Engines
Illustration 2
Cylinder and valve location for Type 2 engines and 7BJ engines.
(A) Exhaust valves
(B) Inlet vales
NOTE: Type 2 engines can be identified in two ways. The
first method 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.
The second method 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 stroke
Combustion system ................................................Direct injection
Nominal Bore .................................................100 mm (3.937 inch)
Stroke ................................................................127 mm (5.00 inch)
Capacity ..................................................................4 liters (243 in 3)
Compression Ratio ..............................................................17.25:1
Number of cylinders ........................................................................ 4
Arrangement of cylinders .......................................................in-line
Firing Order .......................................................................... 1,3, 4, 2
7-4
