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1938 Cadillac V16 - GM Heritage Center

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cylinders of a bank draw from the same manifold leg.<br />

AH intake ports are siamesed. The exhaust ports are<br />

single, the two center ports of each cylinder block connecting<br />

directly to that portion of the exhaust manifold<br />

which heats the intake manifold division chamber.<br />

The two exhaust manifolds discharge into a cross pipe<br />

placed just behind the carburetors. This pipe conducts<br />

the exhaust to the left side of the engine from which<br />

the exhaust system leads it downward and to the rear.<br />

Exhaust System<br />

The exhaust pipe leads backward along the left side of<br />

the chassis to a large muffler mounted transversely<br />

behind the gasoline tank. To keep heat away from the<br />

body interiors, the pipe is outside the frame side bar<br />

for most of its length.<br />

COOLING SYSTEM<br />

j<br />

The new Sixteen engine has two independent water<br />

circulating systems, there being one for each bank of<br />

eight cylinders.<br />

The illustration on page 218 shows the general arrangement<br />

of the water pump and fan belt drive. Two<br />

parallel V-belts driven by double pulleys at the front<br />

end of the crankshaft encircle the two water pump<br />

pulleys at the sides of the engine and the fan drive<br />

pulleys at the top. The double belts obviously have<br />

materially longer life than a single belt.<br />

Each of two outlets at the base of the radiator is<br />

connected to one of two centrifugal water pumps *<br />

mounted in the front ends of both cylinder blocks. The<br />

pumps employ permanent carbon block water pump<br />

packing. The pump impellers are held on very hard '<br />

steel shafts by a press fit. With dual belt drive the<br />

former shear pin construction is unnecessary.<br />

•219»<br />

4

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