Usage:
3612 (9RC),
G3612 (14G),
3616 (1PD),
3616 (4CG) Engines
There have been inquiries about the locations of the air manifold (cavity) drain plugs. The illustrations identify the locations of the air manifold drain plugs on the sides of the cylinder block. If excess oil is found in the air inlet manifold, drain the oil from the cylinder block by removing the drain plugs. Then adjust the Intake Valve Lubrication Metering Pump to provide the correct oil flow. See the Specifications Module of the Service Manual.
Illustration 1. Location of air manifold drain hole. View of the right side of the cylinder block. The rear of the cylinder block is toward the left side of the illustration.
Illustration 2. View A-A. Location of air manifold drain hole. The drain hole is tapped with 7/8-14 thread.
Illustration 3. Location of air manifold drain hole. View of the left side of the cylinder block. The front of the cylinder block is toward the left side of the illustration.
Illustration 4. View B-B. Location of air manifold drain hole. The drain hole is tapped with 7/8-14 thread.