Engine Lubrication: Description and Operation

LUBRICATION SYSTEM

A formed steel oil pan provides lower engine protection as well as serving as the engine oil reservoir. Pan side flanges to block are sealed with RTV. The oil pickup tube has a circular strainer and cover.


Pressure Lubrication

Oil drawn up through the pickup tube is pressurized by the pump and routed through the full flow filter to the main oil gallery running the length of the cylinder block. Modified oil pickup, pump and check valve provide increased oil flow to the main oil gallery.


Main/Rod Bearings

A diagonal hole in each bulkhead feeds oil to each main bearing. Drilled passages within the crankshaft route oil from main bearing journals to crankpin journals.


Accessory Shaft

Two separate holes supply the accessory shaft.


Turbocharger

Pressurized oil from the main gallery to sending unit "hex" fitting is piped from the fitting to the turbocharger bearing housing. From the housing a hose and tube connection drainback to the oil pan.


CAM SHAFTS

Pressurized oil from the cylinder head oil gallery is supplied to number 1 and 6 camshaft journals, then routed from these journals (through internal drilled passages) to the remaining bearing journals and cam lubes.


Splash Lubrication

Oil returning to the pan from pressurized components supplies lubrication to the valve stems. Cylinder bores and wrist pins are splash lubricated from directed holes in the connecting rods.