Teledyne Continental Motors, Inc.
TM
Engine
Description
IOF-550 Permold Series Engine Maintenance Manual
2-5
1 April 2007
2-2.
Detailed Engine Description
2-2.1. Crankcase
The crankcase is composed of two aluminum alloy castings joined along the center
vertical plane. The individual castings with studs and inserts will be referred to as left and
right crankcases throughout the manual.
Bosses molded in the castings are line bored in the assembled casting to form bearings
for the camshaft and saddles for precision main bearing inserts. Guides are bored through
lateral bosses for hydraulic tappets and on the left crankcase half for the governor drive
shaft gear. A needle bearing bore is located on the right crankcase half at the rear main
bearing saddle for the starter adapter and needle bearing.
Cylinder mounting pads on the left crankcase are farther forward than the corresponding
pads on the right crankcase to permit each connecting rod to work on a separate crankpin.
There are seven studs and two through bolts for attaching cylinder base flanges. The
propeller governor mount pad located on the left hand lower front corner of the left
crankcase half. An alternator pad is located on the right Permold crankcase forward of the
number five cylinder mount pad.
The crankcase interior is ventilated by an integral breather in the oil filler adapter inserted
in a machined hole between the number two and four cylinders on the left crankcase half.
7th STUD
LIFTER
BORES
PROP
GOVERNOR
MOUNT
ENGINE
MOUNT
OIL FILLER
NECK MOUNT
CYLINDER
MOUNTING PADS
ALTERNATOR
MOUNTING PAD
ACCESSORY
DRIVE PADS
FUEL
PUMP
MOUNT
STARTER
ADAPTER
MOUNT
OIL PUMP
MOUNT
OIL COOLER
MOUNT
ENGINE
MOUNT
Figure 2-3.
Crankcase