Engine Assembly

of each of these smaller pipes is securely held in its trough and acts as a nozzle directing its stream of oil at an angle into the dipper of the revolving connecting rod. This angle was carefully determined

Oil Pan Assembly

to insure that the connecting rod dipper will intercept the maximum amount of oil in the short time that it is passing the oil stream.

The vertical feed pipe is a seamless steel tube, while the two connecting pipes and the smaller relay pipes are made of double walled tinned brass tubing. They are sweated with leak-proof joints to their respective relays. These relays are of brass and are securely bolted in the assembly. The oil drain is located in a more accessible position at the left side of the oil pan.
Whenever an oil pan is removed from an engine, or a new oil pan is installed, it should be thoroughly cleaned, the height of the troughs and the position of the oil nozzles checked.
The oil pan trough gauge, shown in Fig. 58, is used to check the distance from the flange of the oil pan to the top of the sides of the troughs. The gauge cross bar is rested on the flange, with gaskets
Fig. 58— Oil Trough Gauge
removed, and the rod in the center of the gauge should just clear the sides of the troughs. If it does not, the trough should either be raised or lowered until it does. It is likewise important that the oil
as excessive clearance at this point will reduce the pressure of the pump.
Check clearance between the shaft and oil pump body. This should not exceed .009". If it exceeds, replacement is the only remedy.
The rotor is assembled into the body with the two blades and springs. The taper end of the oil pump blade must be in the direction of pump rotation.
The cover and cover gasket is assembled to the body, being sure that the oil inlet hole in both the cover and the gasket is in line with the oil inlet hole in the body of the oil pump. Fig. 56.
Screen Cover
Fig. 56— Oil Pump Assembly

The oil pump screen cover is placed in position and the oil inlet pipe is assembled in place, thus holding the cover in position. Next the screen is assembled and held in place with the retainer spring.
In securing oil pump assembly to the cylinder block, be sure that the oil pump set screw is fully seated and then locked by means of the lock nut. The taper on this set screw fits into a tapered hole in the oil pump body and centers the oil pump body between the throws of the crankshaft.
Oil Pan Assembly
The new system for delivering oil to the connecting rod bearings is incorporated in the oil pan. The oil dipper troughs are stamped together in a one-piece tray which supports the system and also reinforces the walls of the pan. The tray is securely spot welded in the pan at forty points. Baffles extend below the two central troughs to prevent oil surge. Fig. 57.
The oil feed pipe from the distributor is connected by a relay to two pipes which extend across the oil pan to join two other relays located between the second and third and the fourth and fifth oil troughs.
Three smaller pipes from each of these relays convey the oil to the individual troughs. The end

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