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An Index to Service Information for 1955-56 (55th->56th Series) Packards

An Index to Service Information for
for 1955-56 (55th->56th Series) Packards

Research and Introductions by Brian Harpst
     ~1955-56 (55TH->56TH SERIES)
SC = Service Counselor
STB = Service Technical Bulletin
SSB = Studebaker Service Bulletin


NOTE: These PDFs were created from High Quality Scans. It is recommended that you Right Click on the link(s) above and do a "Save Target As". This will download the PDF to your machine rather than trying to open and view it over the web.
Combustion Test With Dual Exhaust
preferred pickup connection point
55thSC Vol. 29, No. 3, p. 22
Crankshaft Front Oil Seals
leaking - new type
55th-56thSC Vol. 30, No. 3, p. 12
Crankshaft Identification
55thSC Vol. 29, No. 5, p. 30
Crankshaft Identification
55thSC Vol. 29, No. 8, p. 41
Crankshafts, Replacement
superseded part - drop-forged
5560-80; 56thSSB No. 350, p. 7
Cylinder and Piston Assembly
installation with standard transmission
55thSC Vol. 29, No. 8, p. 42
Cylinder Head Oil Passage
noisy rockers levers - restricted
55thSTB 55T-5 (Zones only)
Cylinder Heads, Cast Dome
production change - new specifications and adjustments and identification
5540SC Vol. 29, No. 7, p. 35
Detonation - Supplement
revised distributor mainshaft assembly
5680STB 56T-17, Dealer 14
Auto-Lite distributor conversion kits
5640-60-70STB 56T-19, Dealer 16
insufficient octane - production change, Delco distributor conversion kits
56thSTB 56T-14, Dealer 11
Engine and Parts - Service Bulletin Correction
see SSB No. 350, p. 6 - engine/part numbers
SSB No. 351, p. 3
Engine and Parts - V8 Engines
1955 320-cid stripped engines - will fit 1956
55th-56thSSB No. 350, p. 7
Engine Numbers
Utica number location - changes, identification
55thSC Vol. 29, No. 5, p. 29
Engine, Service
wrong colors, valve covers - casting numbers, identification
55thSTB 55T-33, Dealer 24
Hydraulic Tappet Leak-Down
noise after cold start - redesigned
55thSTB 55T-29 (Zones only)
Hydraulic Tappet Noise
low gallery oil pressure, hot - camshaft thrust plate/spacer, main bearing clearnace
55thSC Vol. 30, No. 1, p. 3
Hydraulic Tappets - General Information
clicking/noisy - diagnosis, cleaning, testing
55th-56thSC Vol. 30, No. 8, p. 31
Hydraulic Tappets, Noisy
idle or 40-50MPH, hot - oil aeration, sticking relief valve
56thSC Vol. 30, No. 3, p. 11
Hydraulic Valve Lifter Checking Tool
new special tool - adapting old tool
55th-56thSC Vol. 30, No. 2, p. 6
Hydraulic Valve Lifters
superseded part
SSB No. 344, p. 2
Hydraulic Valve Tappet Letdown, Oil Pump Relief Valve Tube Kit for Correction of
intermittent at idle, 40-60MPH, hot - revised pump/sump tube, pressure checks/corrections reiterated
55th-56thSTB 56T-20, Dealer 17
Ignition Timing
first production - octane issues
5680-88SC Vol. 29, No. 12, p. 65
Ignition Timing, Incorrect
excessive vacuum - inspection and adjustment
5540STB 55T-39, Dealer 30
Oil Consumption - see also:
Piston Rings
Rocker Lever Shaft Holes
Valve Spring Baffles
Oil Consumption
excessive - rocker levers shafts, intake valve deflectors, and piston rings
55thSTB 55T-19, Dealer 16
Oil Drain Plug Gasket
new nylon type
22nd-56thSC Vol. 30, No. 1, p. 4
Oil Filler Tube Baffle
oil splash - redesigned tube
55thSC Vol. 29, No. 7, p. 38
Piston Pin Lock
groove and wire size change
55thSC Vol. 29, No. 8, p. 40
Piston Pin Locks
supplemental usage
56thSC Vol. 29, No. 12, p. 65
Piston Rings, Chrome
excessive oil consumption - improper installation
55th-56thSC Vol. 30, No. 2, p. 7
Rear Main Bearing Oil Leaks
notching for drainage
55thSC Vol. 29, No. 4, p. 26
Rocker Lever Identification
right vs. left hand
55thSC Vol. 29, No. 5, p. 28
Rocker Lever Shaft Holes - New Shafts
noisy - holes reinstated, smaller
55thSTB 55T-35, Dealer 26
Rocker Lever Shaft Holes - Oil Control
oil consumption - holes eliminated
55thSTB 55T-16, Dealer 14
Rocker Levers
superseded parts - instructions for return/exchange of stock
55th-56thP&A Letter to Dealers,
Mar. 14, 1956
Rough Engines
reporting balancing numbers
55thSTB 55T-23 (Zones only)
Rough Idle - Carter 4-Barrel
secondary return spring tension
5660SC Vol. 29, No. 12, p. 65
Runaway/Flare - see:
Service Manual Corrections - Engine Section
bore/stroke specifications
55thSC Vol. 29, No. 8, p. 41
Stall On Left Turns - Carter 4-Barrel
internal leak - vacuum passage bushing
5660SC Vol. 30, No. 9, p. 36
Valve Spring Baffles (Part Number - Correction)
rocker shaft bolt lockwasher
55th-56thSC Vol. 30, No. 5, p. 20
Valve Spring Baffles
oil consumption - new part
55th-56thSC Vol. 30, No. 1, p. 1
Valve Spring Retainers
spring seats - new harder type
SSB No. 325, p. 1
Valve Spring Seat, Intake
retainer - new harder type
56thSC Vol. 30, No. 7, p. 26
Valve Spring Tool
new special tool - in-car removal
55thSC Vol. 29, No. 5, p. 28

Disclosures & Disclaimers Though previously published elsewhere, this work is provided with my full permission for display on the website and the personal use of visitors to that site. Any other unauthorized use, however, is expressly prohibited and may be subject to prosecution. Also, because this index was compiled from documents published by the factory, neither the author nor are responsible for errors in content arising from source information.

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