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An Index to Service Information for 1935-37 Junior (120->115C) Packards

1935-37 Junior (120->115C) - ENGINE

SubjectApplicationDocument
Air Cleaners, Clean All
oil filler tube cap - crankcase ventilation
120
SL Vol. 9, No. 11
Bearing Clearance, Main and Rod
noise, vibrations - identification, measurement
(not specified)
Bearing Replacements, Connecting Rod
unnecessary replacement - limitation order, guidelines
(not specified)
Bearing Sets, Main
now available - cost-savings
120-138CD;
115C;
1600-1-2;
1700-1-2
Bearing Shells, Connecting Rod
new larger bearings/rods - machine older rods to fit
120-138CD;
115C;
1600-1;
1700-1-1A
Bearing Shells, Note on
rod/main bright or dull - no effect
(not specified)
Bearings Measured Quickly, Rod and Main
new Plastigage Kit - proper use
(not specified)
Bearings, Connecting Rod
rod no longer supplied, use 17th Series - identification, precautions
120C-138CD;
115C;
1600-1-1A
Bearings, Undersize Crankshaft
material shortage - crankshaft regrinding
(not specified)
Break-In Period
refrain from full power operation - limit speed
(all models)
SL Vol. 9, No. 6
Camshaft Removing
procedure - required tools
120
SL Vol. 9, No. 12
Carbon Rattle
piston carbon deposits striking head - use of additional head gasket
(not specified)
Connecting Rod and Cap Assembly
assembly orientation - crankshaft position
120C-138CD;
115C;
1600-1-1A-1D;
1700-1-1A-2;
18th-20th
Connecting Rod Bearings
undersize - markings, identification
12th;
120
SL Vol. 9, No. 6
Cylinder and Piston Assemblies Available
short block less crankshaft - back in stock
1203-4-5;
1403-4-5;
120-138CD;
115C;
1600-1-1A-1D-2;
1700-1-1A-2;
18th-21st
Cylinder and Piston Assembly, Motor - Parts Men Note
still available
115C
Cylinder Head Corrosion
aluminum - checks, maintenance, precautions
12th-14th;
120-138CD;
115C;
15th-16th;
1707-8
Cylinder Head Gasket
installed incorrectly - water bypass hole
120
SL Vol. 9, No. 7
Cylinder Head Gasket Seal
precoated - part reference
7th-14th;
120-138CD;
115C;
15th-16th;
1700-1-2-3-5
Cylinder Head Gaskets
overheating - water passage blocked by sealing film
(not specified)
Cylinder Head Gaskets
wartime shortage - re-use, precautions
(all models)
Cylinder Head Nuts, Tighten
head failures/leaks, oil consumption - proper replacement, torque-tightening
(all models)
Cylinder Head Nuts, Tightening
oil consumption, poor economy/performance, cracked heads - tensioning wrench, procedure
(all models)
Cylinder Head Studs
oversize threads, water jacket seal - identification, sealing paste
All Models
Cylinder Head Tension Wrench
proper tightening reiterated - alternate special tools
(all models)
Cylinder Heads
new cast-iron, 1701 type - 14mm plug holes for high oil consumption
120-138CD
Cylinder Heads
return to cast-iron, gasket usage - replaces aluminum heads, drill new water passages
120-138CD;
1601-1A-2-3-4-5;
1701-1A-2-3-3A-5
Cylinder Heads
use of 18th Series heads - spark plugs hole size; water outlet adaptation
120-138CD;
115C
Cylinder Heads, Ordering
high compression, superseded part - order flange and other details separately
120C-138CD;
1601-2;
1701-2
Cylinder Heads, Return Bolts Shipped with
bundled for shipping - steel shortage
(all models)
Cylinder Repairs
sand hole, shrinkage cracks - Wonder Weld
(all models)
SL Vol. 9, No. 24
Cylinder Repairs
small holes/cracks - repair compounds
(all models)
Cylinders and Valves, Rusted
moving stored vehicles - preparations for starting
(all models)
Cylinders, Oversized
used in production - identification
120
SL Vol. 9, No. 14
Detonation, What to do About
carbon formation, fuel octane - checks and adjustments, cleaning
(all models)
Engine and Adapter Kit, Six Cylinder Replacement
now in-stock for Electromatic and prior to 19th - new crankcase ventilator kits
115C;
1600; 1700; 1800; 1900;
2000-10-20-30;
2100-30
Engine Replacement, Six Cylinder - Correction
standard passenger cars - engine part number
115C;
1600; 1700; 1800; 1900;
2000-10-20;
2100
Engine Replacement, Six Cylinder
new improved design services all models - alterations required
115C;
1600; 1700; 1800; 1900;
2000-10-20-30;
2100-30
Engine Stand and Dolly
new tools - six/eight-cylinder
(not specified)
Engine Stand Price
supplier increase
(not specified)
Engine, Prelubricate Replacement
oiling cylinder walls - break-in
(all models)
Engines, Installing Replacement
alterations for accessories/controls - labor times
120-138CD;
115C
Flywheel Housing Covers
cast design replaces stamped steel
120-138CD;
115C;
1600-1-1A-1D-2;
1700-1-1A-2;
1800-1-1A;
1900-1-1A;
1951;
2000-01-11-10-20-21-30;
2100-01-11-30
Flywheel Timing Mark
redesigned for simpler service
120
SL Vol. 9, No. 9
Front End (Timing) Chain
installation - timing marks
120
SL Vol. 9, No. 13
Idle, Motor
poor quality - ignition/carburetor adjustments
120
SL Vol. 9, No. 7
Idle, Motor
revised spark plug gap - check idle speed
120
SL Vol. 9, No. 15
Manifold Gasket Failures
chafing - chamfer manifold edges
(all models)
Manifold Gasket Leaks, Intake
rough idle - improper tightening, detection
(all models)
Manifold Gaskets, Exhaust
order in sets only - superseded parts
120-138CD;
1601-1-1A-1D;
1701-1A;
1801-1A;
1803-3A-4-5-6-7-8
Miss, Low Speed
incorrect coil polarity, identification - manifold heat valve sticking, motor tuning
120C
Motor - Short Cuts on Service Operations
removal form bottom - leaving front sheet metal in place
120
SL Vol. 9, No. 10
Motor Disturbance
normal bearing noise resonated - flywheel pan insulation
120C;
115C
Motor Numbers - Parts Orders
prefix also required
120-120C;
115C
Motor Period
torsional disturbance - clutch/transmission jazz
(not specified)
Oil Consumption
vacuum booster pump diaphragm leak explained - additional models
120-120C;
115C
Oil Consumption
vacuum booster pump diaphragm leaking - checks, replacement interval
120-120B
Oil Filter - Purolator
product information - added protection
120
SL Vol. 9, No. 9
Oil Filter Cartridge - Change Period Revised
high-detergents oils - reduced
120-138CD;
115C;
16th?-54th
Oil Filter Cartridge Change Period Revised
high detergent oil - reduced interval
120-138CD;
115C;
16th?-54th
Oil Filter Connections, Purolator
loose bracket - leaky unions, pipe failure
(not specified)
Oil For Sub-Zero Operation, Winter Engine
new 5-W oil - issues, limited availability/use
(all models)
STB 49T-40 (Zones only)
Oil Leaks, Front Cover
excessive oil consumption - checks/corrections/precautions
(not specified)
Oil Level, Engine
revised level, new stick - remarking old sticks
120-120C;
115C
Oil Pan Gasket Sets
replace RH-LH, together - available in sets
120-138CD;
115C;
1600-1-1A-1D-2;
1700-1-1A-2;
18th-22nd;
(23rd54th)
Oil Pan, Motor
standard pan shortage - Clipper pan retrofit, indicator calibration
120-138CD;
1601-2;
1701-2;
1801-1A;
1901-1A
Oil Pressure, Low
pan sludge, clogged pickup - cleaning procedure
(not specified)
Oil Pump and Distributor Shaft Aligning Tool
new special tool - instructions
120-120B
Oil Pump Camshaft Gear
sheared drive gear pin, rust - use of thicker drive spring
120-138CD;
115C;
1600-1;
1700-1-2;
1800-1-3-4-5-6-7-8;
19th-20th
Oil Pump Check Valve
sticking, pressure drop - new longer spring, undersize ball
120
SL Vol. 9, No. 7
Oil Seal, Gear Cover
burned, leaking - graphite grease
120-138CD;
115C;
16th-54th
Oil Seal, Rear Main Bearing
leaks - preventative measures
120-138CD;
115C;
16th-18th (exc. 1703-3A-5);
1951;
2000-01-03-06-10-11;
21st;
22nd-24th;
(25th-54th)
Oil Seal, Rear Main Bearing
leaks - undersize
120-138CD;
115C;
16th-18th (exc. 1703-3A-5);
1951;
2000-01-03-06-10-11;
21st;
22nd-54th
Oil Seal, Rear Main Bearing
leaks, bearing distortion - new cork type, installation
120-138CD;
115C;
16th-18th (exc. 1703-3A-5);
1951;
2000-01-03-06-10-11;
21st;
22nd-54th
Oil, Rust Inhibiting
motors in storage - limited availability, alternate sourcing
(not specified)
Oils, Graphited
no cost/benefit advantage
(all models)
SL Vol. 9, No. 12
Perfect Seal - Gasket Paste
non-hardening sealant - head gaskets, additional applications
(not specified)
Perfect Seal Gasket Paste
additional size - applicator kit required
(not specified)
Piston and Rings, Replacement
latest type used for earlier models - check replacement chart for rings only
9th-14th;
120-138CD;
115C;
15th-20th
Piston Oversize Diameters
revised specification, skirt clearance reduced - size reference
?1st-14th;
120-138CD;
115C;
15th-16th
Piston Oversize Diameters
revised specification, variation reduced - size reference
?1st-14th;
120-138CD;
115C;
15th-17th
Piston Pin - Parts Book Correction
part number error
120-120C;
115C
Piston Pin Bushings
two-piece, split-type - oil groove, burnishing procedure
120-138CD;
115C;
1600-1-1A-1D-2-3-4-5;
1700-1-1A-2-3-3A-5;
18th-20th
Piston Ring Sets
part number correction
120B
Piston Ring Sets
Perfect Circle - ordering
(all models)
Piston Ring Sets
X-90 type now available - part reference
(NOTE: page missing from archived document)
120-120B
Piston Rings and Expanders
ample supply for spring season repairs
(not specified)
Piston Rings, Carbonized
oil consumption, low speed, cold weather - oil changes, cleaning procedure
(all models)
Piston Rings, Selling and Installing Perfect Circle
ring groove combinations - use of selection chart
9th-14th;
120-138CD;
115C;
15th-20th
Piston Sizes
identification - reference chart
120-120B
SL Vol. 9, No. 22
Piston Slap
tight pins, shrunken pistons - cold weather, normal condition
(not specified)
Piston, Pin and Ring Oversize Marking, Motor
identification - size/color reference
(all models)
SL Vol. 9, No. 4
Pistons, Oversize Marking on
formerly paint, now stamped - prior chart obsolete
120C-138CD;
115C;
15th
Power, L-Head vs. Valve-In-Head
higher torque/HP - detonation
(all models)
Radiator Shell Ornament Wrench
new special tool - also for rear camshaft bearing plate
120B
SL Vol. 9, No. 20
Scientific Equipment and Data in Diagnosing Service Complaints, Use of
over-all motor check-up - starting/charging, carburetion
(all models)
SL Vol. 9, No. 22
Sludge, Crankcase
driving speed reductions, condensation, bearing trouble - operating temperatures, oil changes
(all models)
Sludge, Engine
cleaning oil pan/screen - engine flushing
(all models)
Stud Remover and Driver
new special tool - cylinder head studs
(all models)
Tappet Hole Reamer
new special tool - oversize tappets, procedure
120
SL Vol. 9, No. 13
Tune-Up, General Motor
poor economy, carbon build-up, burnt valves/plugs/points - standard procedure
120
Valve Grinding
unnecessary - proper carbon removal
120B
Valve Lifter
new special tool - operation
120
SL Vol. 9, No. 10
Valve Seats, Checking
run-out, uneven wear - use of dial indicator
(all models)
Valve Spring Load
reduced by cutting seats - shimming, precautions
(not specified)
Valve Springs
broken - water leakage, corrosion
(not specified)
Valve Springs, Weak
sticking valves - shimming
(not specified)
Valve Tappet Adjustment
minimum clearance - valve spring shim
120
SL Vol. 9, No. 23
Valve Tappet Adjustment
scored push rod - exhaust clearance increased
120
SL Vol. 9, No. 8
Valve Timing
specifications reference
900-1-2-3-4;
10th-14th (exc. Twelves);
120-138CD;
115C;
15th-19th;
2000-1-3-3A-4-5-6-7-8-20-21-23
Valve Wrench - Tool Suggestion
improvement - stops slipping
(not specified)
Valves and Car Storage, Sticky
running motors, internal rust - cylinder oiling, battery removal/charging
(all models)
Valves, Rusted Cylinders and
moving stored vehicles - preparations for starting
(all models)
Valves, Sticking
carbon, gum, rust, mechanical causes/remedies
(all models)
Valves, Sticking
vehicles in storage - precautions reiterated
(all models)
Valves, Sticky
cold starts/stops, rust in guides - new corrosion-resistant material
(all models)
Valves, Sticky
exhaust valves, rust - proper storage
(all models)
Valves, Sticky
low speed operation, exhaust valves - valve chamber ventilation
120
Valves, Sticky
valves/guides - valve spring tension
(all models)
Vibration Damper Wrench
new special tools - required
(NOTE: page missing from archived document)
120-120B;
115C
1600-1
Vibration Damper Wrench and Puller
special tool - sale pricing, description
(not specified)
Warm Weather Service
engine/cooling system - inspection/maintenance
(all models)
Wrist Pins, Loose
low mileage, bushing black/corroded - insufficient oil changes
(not specified)

SC = Service Counselor
SL = Service Letter
STB = Service Technical Bulletin
SSB = Studebaker Service Bulletin

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