Hudson 1948 - 1952, Service Manual

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1 - 10 LUBRICATION
OIL DILUTION
The lubricating oil in the crankcase is sometimes
thinned or diluted due to gasoline leaking by pistons and
rings and mixing with the oil. This leakage usually occurs
during the "warming-up" period when the fuel is not
thoroughly vaporized and burned.
The Hudson engines are equipped with automatic
devices that are designed to reduce oil thinning caused by
raw fuel dilution.
In order to assist the engine to warm up as quickly as
possible the water temperature is controlled by a thermo-
stat which prevents complete water circulation for cool-
ing until a predetermined temperature has been reached.
Another thermostat automatically controls the open-
ing of a valve mounted inside the exhaust manifold to
vary the amount of heat applied to the walls of the intake
manifold. This item combined with the previously men-
tioned features greatly reduces the cold running periods.
As a further safeguard, the Hudson crankcase ventilat-
ing system is utilized to expel from the crankcase any
ordinary collection of water or fuel vapors. In this system
the rotating crankshaft acts as a blower to force such
vapors from the case via the breather tubes on the valve
chamber cover.
CRANKCASE VENTILATOR
Inlet:
The crankcase ventilator inlet is part of the crankcase
oil filler cap assembly on the 6 cylinder engines. This filler
cap contains copper gauze which filters the air passing
into the crankcase.
The cap should be inspected every time oil is added
and should be thoroughly cleaned at least every 5,000
miles. Clean in gasoline and blow dry. Re-oil the filter
element gauze.
Outlet:
The crankcase outlet ventilator is mounted at the rear
valve cover on both 6 and 8 cylinder engines.
In cases of excessive oil usage or leaks at rear main bearing,
check the outlet breather pipe. This pipe may be plugged
with dirt, and on the 8 cylinder engines, it may be restricting
at the valve cover baffle. DO NOT tighten the breather
outlet pipe attaching bolt more than 2 -3/4 to 3-1/4 torque
pounds.
CAPACITIES
Engine Oil - Dry
U.S. Quarts
Imperial Quarts
Engine Oil-Refill
U.S. Quarts
Imperial Quarts
Clutch
U.S. Pint
Imperial Pint
Transmission (Single Lever Type)
U.S. Lbs
Imperial Lbs
Transmission (Double Lever Type)
U.S. Lbs
Imperial Lbs.
U.S. Lbs.
Imperial Lbs.
U.S. Lbs.
Imperial Lbs
Hydra-Matic Refill
U.S. Quarts
Rear Axle
U.S. Lbs.
Imperial Lbs.
6 Cyl.
7-1/2
6-1/2
7
6
1/3
1/4
2
2
2 -1/4
2 -1/4
3
3
3-1/4
3-1/4
11
3-1/2
3-1/2
8 Cyl.
8
7-1/2
7
6
1/3
1/4
2
2
2 -1/4
2 -1/4
3-1/4
3-1/4
3
3
11
3-1/2
3-1/2
Transmission & Overdrive (Single Lever Type)
Transmission & Overdrive (Double Lever Type)