The Chrysler Industrial Engine which provides the
power for the Siren, is a 90 degree inclined, V-type with overhead
valves, developing 180 brake horsepower at 4000 R.P.M. and 312 foot
pounds torque at 2000 R.P.M. One of the most outstanding features of the
Engine, is the. hemispherical combustion' chambers located in the
cylinder heads. This type of combustion chamber plus the lateral valve
arrangement provides the maximum amount of space for extra large valves
and permits direct and unrestricted exhaust and intake porting.
An important feature is the relation of the bore and
stroke - 3 13/16 x 3 5/8" - which contributes to a smooth power output.
Compression ratio is 7.5 to 1. Cylinders are numbered from front to rear
as follows: Right bank 2-4-6-8 Left bank 1-3-5-7. These cylinders fire
in 1-8-4-3-6-5-7-2 order.
Five large, precision-type main bearings support the
crankshaft. The camshaft is also supported by five precision-type
bearings. Mounted on the front end of the crankshaft is a torsional
Positive lubrication to all moving parts is provided
by a gear-driven rotary type oil pump, a full-flow filter cleans the oil
before it circulates through the Engine.
Operation of the improved lateral valve arrangement
is by means of hydraulic tappets, through push rods and rocker arms,
providing the maximum amount of space for extra large valves. Each valve
has two springs, one inside the other. This prevents spring flutter and
insures positive valve closing at all times.
The rocker arms are mounted on parallel shafts. Oil,
under pressure, flows through passages in those shafts to lubricate the
entire valve train. The hydraulically operated valve tappets provide
efficient operation and require no special attention.
The following text is provided as a guide in
performing such routine operations as can be handled by the Siren
Operator, as well as containing condensed maintenance information.
In order to maintain the original high standard of
performance of the Chrysler Engine, only competent mechanics having
access to suitable tool equipment, should be assigned to perform any
If the facilities of the user are not adequate, it is
recommended that the Service Department of the nearest Chrysler Dealer
be consulted or write to the Chrysler Marine and Industrial Engine
Division, 2000 Van Horn Road, Trenton, Michigan.