Pages 4–8 (5 pages)

Engine

From the 1938 Chevrolet Passenger Car and Truck Service Information

Engine changes for 1938, which otherwise matches the 1937 unit: camshaft bearings with a 70-degree oil groove in place of grooved journals, a spring-loaded leather front cover seal (J-995 replacer, J-966 centering gauge), tappet springs dropped in favor of stronger valve springs, shorter exhaust valve guides, a redesigned exhaust valve, a distributor oil-arresting groove, a stronger thermostat, a lighter flywheel and AC-46 spark plugs at .040 inch gap.

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What this section covers

  • Camshaft bearings and oil grooves
  • Front end cover seal
  • Valve springs and tester settings
  • Exhaust valve guides and exhaust valve
  • Distributor housing oil groove
  • Thermostat, flywheel and spark plugs
Year
1938
Make
Chevrolet
Vehicle
Light Duty Trucks, Medium Duty Trucks, Passenger Cars, Trucks
Type
Service Manual
Models
Master and Master De Luxe passenger cars; 1/2-ton, 3/4-ton, 1-ton and 1-1/2-ton trucks and commercial models
Pages
75

What’s inside

Passenger cars

  1. Title Page and IntroductionCover, title page from Chevrolet Motor Division, and an introduction on why service men should learn the 1938 changes.pp. 1–3
  2. Enginepp. 4–8
  3. Coolingpp. 9–16
  4. Fuel Systempp. 17–20
  5. Clutchpp. 21–34
  6. TransmissionChanges to the carried-over Syncro-Mesh transmission: a redesigned clutch gear bearing nut and oil slinger, a bearing retainer that supports the throw-out bearing, and a stamped gearshift lever housing.pp. 35–35
  7. Rear AxleRear tread widened to 59 inches with a heavier housing and axle shafts, and new rear spring seats insulated by rubber bushings.pp. 36–37
  8. Steeringpp. 38–43
  9. BrakesHydraulic main cylinder improvements (check valve seat, primary cup insert, lock ring and boot) and the redesigned twelve-tooth hand brake lever.pp. 44–45
  10. Electricalpp. 46–63
  11. BodiesBody refinements for 1938: wider rear seat, new front seat back, draft-proof door sills, a larger Sport and Town sedan trunk with upright spare, Business Coupe deck lid spring, illuminated ignition lock and stronger front body brackets.pp. 64–66

Trucks

  1. Truckspp. 67–75

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