DETROIT DIESEL 53
ENGINE MODEL, SERIAL NUMBER AND OPTION PLATE
Fig. 5 - Typical Model and Serial Numbers as Stamped on Cylinder Block (In-Line Engine)
On the In-line engines, the model number and serial number are stamped on the right-hand side of the cylinder block in
the upper rear corner (Fig. 5).
Fig. 7 - Option Plate
An option plate, attached to the valve rocker cover, is also stamped with the engine serial number and model number
and, in addition, lists any optional equipment used on the engine (Fig. 7). Where required, a smoke emission certification
plate is installed next to the option plate.
With any order for parts, the engine model number and serial number must be given. In addition, if a type number is
shown on the option plate covering the equipment required, this number should also be included on the parts order.
All groups of parts used on a unit are standard for the engine model unless otherwise listed on the option plate.
Power take-off assemblies, torque converters, marine gears, etc. may also carry name plates. The information on these
name plates is also useful when ordering replacement parts for these assemblies.