Section 2-A · Pages 15–21 (7 pages)

Engine Specifications

From the 1948–1949 Buick Shop Manual

Specifications for the valve-in-head straight-eight engines: 248.1 cubic inches in Series 40-50 and 320.2 cubic inches in Series 70, with compression ratios of 6.3 to 6.9 to 1, firing order 1-6-2-5-8-3-7-4 and horsepower ratings for Syncro-Mesh and Dynaflow cars. It gives the engine tightening torques, crankshaft, rod, piston, camshaft and valve data, fits and adjustments, and charts relating engine speed to car speed by axle ratio and tire size.

Read this section free, starting at page 15

What this section covers

  • Engine tightening specifications
  • General specifications by series
  • Crankshaft, connecting rods, pistons and rings
  • Camshaft and valve mechanism
  • Oiling system
  • Dimensions, fits and adjustments
  • Engine speed vs. car speed charts
Year
1948, 1949
Make
Buick
Vehicle
Passenger Cars
Type
Service Manual
Models
Series 40, 50 and 70: Models 41, 46-S, 51, 56-S, 56-C, 59, 71, 76-S, 76-C, 79 (Estate Wagons 59, 79)
Pages
511

What’s inside

Shop manual

  1. 1-APeriodic Lubricare Instructionspp. 1–7
  2. 1-BOther Lubricare InstructionsWhen to change engine oil and which oil to use, draining, flushing and refilling the rear axle, and lubrication jobs that are not done on a fixed schedule.pp. 8–10
  3. 1-CBearing Servicepp. 11–14
  4. 2-AEngine Specificationspp. 15–21
  5. 2-BEngine Descriptionpp. 22–33
  6. 2-CEngine Tune-Up and Trouble Diagnosispp. 34–38
  7. 2-DCylinder Head and Valve Mechanism Servicepp. 39–46
  8. 2-ECrankshaft and Connecting Rod Bearings, Pistons and Ringspp. 47–55
  9. 2-FCooling and Oiling Systems Servicepp. 56–61
  10. 2-GEngine Mountings, Flywheel and Housingpp. 62–66
  11. 3-AFuel and Exhaust Specifications, Description and Service Recommendationspp. 67–72
  12. 3-BFuel System Trouble DiagnosisDiagnosis of hard starting, poor engine performance and excessive fuel consumption, with a gas mileage test procedure and expected mileage at 30, 50 and 70 mph for each series.pp. 73–75
  13. 3-CFuel System Adjustments and Replacementspp. 76–83
  14. 3-DFuel and Vacuum Pumppp. 84–91
  15. 3-ECarter Carburetor and Climatic Controlpp. 92–106
  16. 3-FStromberg Carburetor and Automatic Chokepp. 107–120
  17. 4-AClutch, Syncro-Mesh Transmission and Universal Joint SpecificationsTightening torques and clutch, Syncro-Mesh transmission and universal joint specifications. A note says Dynaflow information is in the 1948 Buick Dynaflow Transmission Service Manual (B.P.S. 1.30).pp. 121–122
  18. 4-BClutchpp. 123–134
  19. 4-CSyncro-Mesh Transmission and Universal Jointpp. 135–162
  20. 5-ARear Axle Specifications and Descriptionpp. 163–166
  21. 5-BDiagnosis of Rear Axle Noisepp. 167–170
  22. 5-CRear Axle Repair Procedurespp. 171–187
  23. 5-DRepairs Requiring Removal of Rear Axle AssemblyRemoving and installing the rear axle assembly, replacing the third member housing, and replacing and drilling the rear axle strut rods.pp. 188–190
  24. 6-AChassis Suspension Specifications, Description and Service Recommendationspp. 191–199
  25. 6-BChassis Suspension Trouble Diagnosispp. 200–205
  26. 6-CChassis Suspension Repair Operationspp. 206–216
  27. 6-DWheel Balance and Alignmentpp. 217–224
  28. 7Steering Gear and Tie Rodspp. 225–236
  29. 8-ABrake Specifications, Description, Operation and Service Recommendationspp. 237–243
  30. 8-BBrake Trouble DiagnosisHow to road test brakes, outside conditions such as tires and loading that affect braking, and a chart of brake trouble symptoms and their corrections.pp. 244–246
  31. 8-CBrake Service and Adjustment Procedurespp. 247–252
  32. 8-DBrake Replacement and Repair Procedurespp. 253–258
  33. 9Frame and Bumperspp. 259–268
  34. 10-AElectrical Specificationspp. 269–273
  35. 10-BElectrical Trouble Diagnosispp. 274–279
  36. 10-CBattery and Cablespp. 280–288
  37. 10-DGenerating Systempp. 289–304
  38. 10-ECranking (Starter) Systempp. 305–323
  39. 10-FIgnition Systempp. 324–342
  40. 10-GLighting Systempp. 343–352
  41. 10-HSignal Systemspp. 353–364
  42. 10-IInstruments and Clockpp. 365–370
  43. 10-JWiring Circuit Diagramspp. 371–388
  44. 11-ARadiopp. 389–416
  45. 11-BAccessories Other Than Radiopp. 417–426
  46. 12-ASheet Metal Specifications and Descriptionpp. 427–430
  47. 12-BHood and Front End Sheet Metal Alignmentpp. 431–440
  48. 12-CReplacement of Fenders, Extensions and Rear Wheel Shieldspp. 441–444
  49. 13-ABody Introduction and Mountingspp. 445–451
  50. 13-BDoors and Compartment Lidspp. 452–461
  51. 13-CWindshield, Wiper, Closed Body Windows and Ventilatorspp. 462–473
  52. 13-DInterior Trim and Seatspp. 474–479
  53. 13-EConvertible Coupe Bodiespp. 480–486
  54. 13-FHydro-Lectric Power Systempp. 487–501
  55. 13-GEstate Wagon Body Servicepp. 502–505

Index

  1. 14IndexAlphabetical subject index with group page numbers.pp. 506–511

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