1953-1968 Jeep CJ-3B Service & Repair Manual

1953-71 SERVICE MANUAL J e e P UNIVERSAL 4-WHEEL DRIVE CJ-3B CJ-5A CJ-5 CJ-6 CJ-6A 2-WHEEL DRIVE DJ-5 DJ-6 Copyright® 1977 FI Jeep Corporation Corporate Publications Printed in USA Reprinted 6-77 SM-1046 SECTION INDEX NAME Section General Data A Lubrication B Tune-Up C Hurricane F4 Engine D Dauntless V-6 Engine Dl Fuel System E Exhaust System F Exhaust Emission Control System F4 Engine Fl Exhaust Emission Control System V6-225 Engine F2 Cooling System G Electrical H Clutch I 3-Speed Transmission J 4-Speed Transmission Jl Transfer Case K Propeller Shafts L Front Axle M Rear Axle N Steering 0 Brakes P Wheels 0 Frame R Springs Shock Absorbers S Body T Miscellaneous U

IMPORTANT DEALER INFORMATION This manual, SM-1046, covers current 'Jeep' Universal Series vehicles, and past models, except as noted hereinafter: SM-1037 should be retained in your service library for information related to the 6-volt electrical system, or the single brake system. SM-1002-R5 (no longer available) should be retained for information related to the CJ-2A, CJ-3A or DJ-3A models equipped with the L4-134 engine. The above three manuals provide full service coverage since inception of the 'Jeep' Universal and 1 Jeep' Dispatcher model vehicles.

'Jeep* UNIVERSAL SERIES SERVICE MANUAL A GENERAL DHTfl Contents SUBJECT PAR. General A-l Vehicle Description .A-2 Vehicle Identification A-3 Identification Number Location A-4 Serial Number Location A-5 Engine Code Number A-6 Plate-And-Trim Option Plate A-7 General Specifications A-8 A-1. GENERAL This manual is provided for the guidance of all automotive service men, vehicle owners, and service salesmen who repair, maintain, or adjust the 'Jeep' Universal Series vehicles. The information herein was prepared from the service man's viewpoint to give him the accurate and concise data he may need to service the entire vehicle. The information is not elementary as it is intended for automotive service men who are familiar with automotive construction and repair in general. It is not intended, nor would it be possible in such limited space, to cover every possible repair that he may encounter. All specifications are in accord with Engineering Specifications and should be adhered to in all work on the vehicle. The manual sections follow logical division into major components of the vehicles. The first page of each section has a detailed index of the contents of that section. Subject matter covers all models included in this manual unless an exception for a particular model is specifically mentioned. Specifications and components covered were for standard production models of 'Jeep' vehicles current at the time the manual was approved for printing. 'Jeep' Corporation reserves the right to discontinue models at any time or change specifications or design of any of its models without notice and without incurring any obligation. A-2. Vehicle Description This manual covers all standard production 'Jeep' Universal models currently being produced at the time this manual was approved for publication. Significant changes made in each model since it was first produced are included in the manual. A description of each model follows. General specifications for each model are listed in Par. A-8. Detailed specifications covering major vehicle units are listed at the end of each section of the manual. CJ-3B — This is a 4-wheel-drive 'Jeep' Universal model, equipped with the four-cylinder Hurricane F4-134 engine. Wheelbase is 80". CJ-5 CJ-5A — These are 4-wheel-drive 'Jeep' Universal models, equipped with either the Daunt- less V-6 engine, or the four-cylinder Hurricane F4-134 engine. Wheelbase is 81". CJ-6 CJ-6A — These are 4-wheel-drive 'Jeep' Universal models, equipped with either the Daunt- less V-6 engine, or the four-cylinder Hurricane F4-134 engine. Wheelbase is 101". DJ-5 DJ-6 — These are 2-wheel-drive 'Jeep' Universal models, equipped with the four-cylinder Hurricane F4-134 engine. DJ-5 wheelbase is 81". DJ-6 wheelbase is 101". A-3. Vehicle Identification Each 'Jeep' vehicle model series has one or more serial number prefixes to identify it. Complete identification of a specific vehicle requires the prefix plus the serial number. Serial numbers are consecutive for each prefix grouping. Prefix information following will identify the 'Jeep' models shown by serial number prefix from model inception to date.-. • ' . - Note: Vehicles with a serial number prefix of five (5) or more digits that have an S, 5, or 7 as the last digit are equipped with Exhaust Emission Control. A number 1 in the sixth (6th) digit within a seven (7) digit vehicle serial number prefix indicates Left Hand Drive; a 2 indicates Right Hand Drive; a 3 indicates Left Hand Drive California Exhaust Emission Control Engine; a 4 indicates Right Hand Drive California Exhaust Emission Control Engine. 3

A GENERAL DATA 'Jeep' Serial No. 'Jeep' Serial No. Model Prefix Model Prefix CJ-3B 453-GB2 CJ-3B 454-GB2 57348 8105 8105014 CJ-5 57548 CJ-6 57648 8305 8405 8305A 8405A 8305S 8405S 8305AS 8405AS 8305014 8405014 8305015 8405015 8305016 8405016 8305017 8405017 CJ-5A 8322 CJ-6A 8422 8322A 8422A 8322S 8422S 83 2 2AS 8422AS . DJ-5 8505 DJ-6 8605 8505A 8605A 8505S 8605S 8505AS 8605AS 8505014 8505015 8505016 8505017 Any prefix not given here for one of the listed models indicates a special vehicle whose differences from standard are not covered in this manual. A-4. IDENTIFICATION NUMBER LOCATION All 'Jeep* vehicles and some of their major components have identifying numbers. Paragraphs following will describe the location of identifying numbers. A-5. Vehicle Serial Number The vehicle serial number is stamped on a metal plate located on the dash under the hood. It is on the left side of the vehicle for models CJ-5, CJ-5A, CJ-6, CJ-6A, DJ-5 and DJ-6 as shown in Fig. A-l. It is on the right side of the vehicle for model CJ-3B, as shown in Fig. A-2. Refer to Par. A-3 for specific information on codes. FIG. A-l—CJ-5, CJ-5A, CJ-6, CJ-6A, DJ-5, DJ-6 VEHICLE SERIAL NUMBER LOCATION FIG. A-2 CJ-3B VEHICLE SERIAL NUMBER LOCATION A-6. Engine Code Number The engine identification number consists of a prefix followed by a five-digit or six-digit code number. The prefix identifies the particular engine. The F4-134 engine code number is stamped on the FIG. A-3—ENGINE C O D E N U M B E R LOCATION HURRICANE F4-134 FIG. A-4—ENGINE C O D E N U M B E R LOCATION DAUNTLESS V-6 4

'Jeep' UNIVERSAL SERIES SERVICE MANUAL A water pump boss at the front of the engine, as shown in Fig. A-3. The Dauntless V-6 code number is stamped on the right front face of the cylinder block, just below the rocker arm cover as shown in Fig. A-4. A-7. Paint-and-Trim Option Plate A Paint-and-Trim Option Plate is installed on late production 'Jeep' vehicles. The paint code on the plate identifies the paint colors. The trim code on the plate identifies the color of all trim parts in the interior of the vehicle. To identify paint or trim on vehicles manufactured before the Paint-and-Trim Option Plate was installed, see your 'Jeep' dealer. 'Jeep' Universals have the plate located on the right hand side of the dash under the hood, as shown in Fig. A-5. FIG. A-5—PAINT AND TRIM OPTION PLATE LOCATION 5

GENERAL DATA A-8. GENERAL SPECIFICATIONS MODEL: CJ-3B CJ-5, CJ-5A DJ-5 CJ-6, CJ-6A DJ-6 Engine:. Number of Cylinders Bore. . Stroke. Displacement Compression Ratio: Late Production — Standard — Optional. — Optional. Early Production — Standard — Optional. — Optional. Compression Pressure Horsepower (max. Brake) Horsepower (SAE) Torque (Max. at 2000 rpm.). . . . Engine: Number of Cylinders Bore Stroke Displacement Compression Ratio Horsepower (max. Brake). Horsepower (SAE) Torque (Max. at 2400 rpm.). . . . Wheelbase Tread (front and rear) , Height (Over all) Length (Over all). Width (Over all) Ground Clearance F-4 4 3.125 [7,93 cm.] 4.375 [11,11 cm.] 134.2 cu. in. [2,20 ltr.] 7.4:1 7.8:1 6.9:1 120 to 130 psi. [8,4 a 9,2 kg-cm 2 ] 75 <§ 4000 rpm. 15.63 114 lb-ft. [15,8 kg-m.] 80" [2,03 m.] 48 7 -'f 6 / ' [1,23 m.| 6634" [1,68 m.j 129%" [3,30 m.] 68%" [1,75 m.] 8" [20,32 cm.] F-4 4 3.125 [7,93 cm.] 4.375 [11,11 cm.] 134.2 cu. in. [2,20 ltr.] 6.7:1 7.1:1 6.3:1 7.4:1 7.8:1 6.9:1 120 to 130 psi. [8,4 a 9,2 kg-cm 2 ] 75 @ 4000 rpm. 15.63 114 lb-ft. [15,8 kg-m.] V-6 6 3.750" [9,525 cm.] 3.400" [8,636 cm.] 225 cu. in. [3,69 ltr.] 9.0:1 160 @ 4200 rpm. 33.748 235 lb-ft. [32,49 kg-m.] 81" [2,06 m.] 48K 6 " [1,23 m.] 67" [1,70 m.] 138%" [3,51 m.] 71%" [1,82 m.] 8" [20,32 cm.] F-4 4 3,125 [7.93 cm.] 4.375 [11,11 cm.] 134.2 cu. in. [2,20 ltr.] 6.7:1 7.1:1 6.3:1 7.4:1 7.8:1 6.9:1 120 to 130 psi. [8,4 a 9,2 kg-cm 2 ] 75 @ 4000 rpm. 15.63 114 lb-ft. [15,8 kg-m.] V-6 6 3.750" [9,525 cm.] 3.400" [8,636 cm.] 225 cu. in. [3,69 ltr.] 9.0:1 160 @, 4200 rpm. 33 748 235 lb-ft. [32,49 kg-m.] 101" [2,57 m.] 48^6* ]1,23 m.] 67" [1,70 m.] 1583/4" [4,02 m.] 71%" [1,82 m.] 8" [20,32 cm.] CAPACITIES: U.S. Imperial Metric Fuel Tank (Approximate): Early Models Late Models Cooling System F4 Models V-6 Models Note: If not equipped with heater deduct 10.5 gal. 16 gal. 12 qt. 10 qt. 1 qt. 8.8 gal. 13.3 gal. 10 qt. 8 qt. .8 qt. 39,75 ltr. 60,57 ltr. 11,4 ltr. 9,5 ltr. 0,9 ltr. CJ- 3B CJ-5 CJ-6 DJ-5 DJ -6 lb. kg. lb. kg. lb. kg. lb. kg. lb. kg. WEIGHTS (Approximate): Gross Vehicle Weight (GVW). 3500 1587 3750 1701 3900 1769 3200 1451 3200 1451 Shipping — V6 Engine — '— 2240 1016 2302 1044 1900 862 2033 922 F4 Engine 2132 967 2163 981 2225 1009 1796 814 1858 842 Curb — V6 Engine — — 2351 1066 2413 1094 2011 912 2144 972 F4 Engine 2243 1017 2274 1031 2336 1060 1907 865 1969 893 For Canvas Half-Top Model, add 35 17 38 17 38 17 38 17 38 17 For Canvas Full-Top Model, add 56 25 56 25 60 27 56 25 60 27 For Hard Top Model, add ~~ 340 154 340 154 6

'Jeep* UNIVERSAL SERIES SERVICE MANUAL B LUBRICATION AND PERIODIC SERVICES Contents PAR. SUBJECT PAR. SUBJECT GENERAL .B-l Chassis Lubrication B-7 Engine Lubrication System B-4, B-6 Special Lubricants B-2 Fresh Lubricant. .B-3 LUBRICATION CHARTS . Pages 8, 9 SERVICE MAINTENANCE SCHEDULE. .B-8 Air Cleaner B-2 5, B-2 6 Air Filter — F.E.E.C. System Canister B-2 4 Axle U-Bolts B-49 Body Lube Points: B-65 Hood Hinge Pivot Points B-66 Glove Compartment Door Latch B-6 7 Tailgate Hinges .B-68 Brakes, Adjust .B-41 Brake Linings .B-42 Brake Master Cylinder B-40 Charging Circuit B-l9 Clutch . B-43, B-44 Cooling System—Radiator. B-28, B-29 Differentials ........ .B-50, B-51, B-52, B-53 Distributor B-14, B-l5 Engine Oil B-9 Engine Oil Filter B-10, B - l l Engine Tune-Up B-20 Exhaust Emission Control System B-2 2 Exhaust Manifold Heat Control Valve . . . . B-l2 Exhaust System B-2 3 Fan Belt . .B-21 Front Axle U-Joint B-54, B-55 Generator .B-16 Headlights B-61 Heater Controls B-62 Lights and Controls B-59 Positive Crankcase Ventilation Valve . . . . B-l3 Shock Absorbers B-48 Spark Plugs. B-17 Speedometer Cable. .B-60 Spring Bushings.. . . B-46 Spring Shackles .B-47 Steering Gear B-2 7 B-l. GENERAL All 'Jeep' Universal vehicles require periodic lubrication and other maintenance services for normal vehicle usage and application to promote satis- factory operation and prevent excessive wear. Un- der severe operating or atmospheric conditions these services should be performed more often than under normal conditions. It should also be remem- bered that common short trips and stop-and-go driving are more severe on lubrication points than Starting Circuit B-l8 Tie Rod and Drag Link Sockets . B-45 Tires B-64 Transmission and Transfer Case— Lubricant Level Check B-30 General B-31 Transfer Case B-32 Transmission .B-33 Transmission and Transfer Case — Lubricant Change .B-34 General .B-35 Transfer Case B-36 Transmission B-3 7, B-38 Transfer Case Linkage B-39 Universal Joints and Slip Joints. ....... .B-58 Wheel Bearings.. ......... . . .B-56, B-57 Windshield Wiper and Washer B-63 LUBRICATION OF OPTIONAL EQUIPMENT B-69 Centrifugal Governor. .B-71 Pintle Hook .B-70 Powr-Lok or Trac-Lok Differential B-72 PARTS REQUIRING NO LUBRICATION. . . .B-73 Alternator Bearings. B-76 Clutch Release Bearings. ............. .B-74 Shock Absorbers B-78 Springs B-7 7 Starter Motor Bearings B-75 Water Pump Bearings B-74 LUBRICATION REQUIREMENTS FOR OFF-HIGHWAY OPERATIONS B-79 Air Cleaner B-82 Chassis Lubrication B-83 Engine Oil B-80 Engine Oil Filter B-81 Differentials .B-86 Front Axle U-Joints. B-84 Transfer Case and Transmission .B-85 constant speed driving on highways, and even more intensified in extreme cold or hot weather; there- fore, vehicles driven under these conditions must be lubricated and serviced more often than nor- mally operated vehicles. The specifications of types and amounts of lubricant given in the Lubrication Chart and text of this section should be closely followed. The off-highway operation lubrication notes, given in the last part of the section, should be followed when applicable. 7

B LUBRICATION D0® ® ® ® FIG. B-l—-LUBRICATION CHART — 4-WHEEL DRIVE VEHICLES CHART NO. ITEM T O B E LUBRICATED 10. 11. 13. 14. Chassis Bearings. . . Spring Shackle and Pivot Bushings... Universal Joints Propeller Shaft Front Axle Steering Gear Housing Rear Wheel BearingstS Front Wheel Bearings <S>. Transmission: 3 Speed 4 Speed ° Transfer Case Differentials Front. Rear Speedometer Cable Generator — F4 Distributor — F4 Oiler Wick Pivot. Gam Distributor Cam — V6. Air Cleaner — F4 — V6 Engine — F4 Engine — V6. FREQUENCY 1000 miles — 1.600 km. Each 2,000 miles /With Lube Fitting; (Each 2,000 miles [Without Lube Fittings: \No Lubrication Each 2,000 miles f Check each 2,000 miles \ Change each 12,000 miles Check each 2,000 miles fWith Lube Fittings: 1 Sparingly each 2,000 miles J Without Lube Fitting: | Disassemble to lubricate \each 12,000 miles Disassemble to lubricate each 12,000 miles I Check each 2,000 miles l Change each 12,000 miles /Check each 2,000 miles l Change each 12,000 miles !Check each 2,000 miles \ Change each 12,000 miles f Check each 2,000 miles \ Change each 12,000 miles . Disassemble to lubricate each 12,000 miles Each 2,000 miles Each 2,000 miles Each 2,000 miles Each 2,000 miles Each 2,000 miles At each breaker point replacement /Each 2,000 miles \Each 6,000 miles Change each 2,000 miles or 60 days Change each 6,000 miles or 60 days QUANTITY U.S. Imperial Metric As required As required As required As required As required As required As required 2H Pts. 2 pts. 1,2 ltrs. 6 H pts. 5 M pts. 3,2 ltrs. 3Mpti« 3 pts. 1,5 ltrs. 2 M pts. 2 pts. 1,2 ltrs. 2 Yi pts. 2 pts. 1,2 ltrs. As required Several Drops Several Drops One Drop One Drop 2 c.c. As required 1 H pts. 1 pt. 0,6 ltrs. 4 qt. m 314 qt. 3,8 ltrs. 4 qt. 11 3 34 qt. 3,8 ltrs. LUBRICANT TYPE Chassis Lubricant Chassis Lubricant Chassis Lubricant GL3 MIL-L-2105-B Wheel Bearing Lubricant Wheel Bearing Lubricant GL4 GL4 GL4 MIL-L-2105-B MIL-L-2105-Bttt Graphite Grease Engine Oil Engine Oil Engine Oil Engine Oil Cam Lubricant Cam Lubricant Engine Oil Engine Oil Engine Oil GRADE No. 1 No. 1 No. 1 No. 1 No. 1 SAE-140 No. 1 SAE-140 SAE-80 No. 2 SAE- No. 80 2 No. 2 No. 2 SAE-90 SAE 80 SAE-90 SAE 80 SAE-90 SAE 80 SAE-80 SAE-80 SAE SAE 80 80 Light Same as engine Same as engine Same as engine Same as engine SAE-40 or 50 SAE-20 Above 90 °F. use S A E 30 or 10W-30 Not lower than 32°F. [0°C.| use S A E 20W or S A E 10W-30 Between -f-10°F. and 90 8 F. use S A E 20W or 10W-30 Between -10°F. and +10°F. use S A E 10W or 10W-20 Between 32 e F. [0°C.] and 0°F. l-17°Cl use S A E 10W or S A E 10W-30 *4-Speed transmission and transfer case require separate lubrication of each unit. tttFor Powr-Lok and Trac-Lok differential use only 'Jeep* Differential Oil, Part No. 94557. SI When filter is changed at the same time, add one quart. ® Do not mix lithium and sodium base lubricants. Use lithium base lubricant as specified Below -10°F. use S A E 5W or 5W-20 Below 0°F. [-17°C.J use S A E 5W or S A E 5W-20 8

*Jeep ? UNIVERSAL SERIES SERVICE MANUAL FIG. B-2—LUBRICATION CHART — 2-WHEEL DRIVE VEHICLES CHART NO ITEM T O B E LUBRICATED FREQUENCY 1000 miles = 1.600 km. QUANTITY U.S. Imperial Metric LUBRICANT TYPE Summer I Winter Chassis Bearings ..... Universal Joints ...... Steering Gear Housing Rear Wheel Bearings fx Front Wheel Bearings® Transmission Differential Hand Brake Control Handle Cable Hand Brake Control Cable Rear Generator — F4 Speedometer Cable .... Distributor — F4 Oiler Wick Pivot Cam Distributor Cam — V6. Air Cleaner — F4 — V6. .... Engine — F4 Engine — V6 Each 2,000 miles Each 2,000 miles Check each 2,000 miles With Lube Fittings; Sparingly each 2.000 miles Without Lube Fittings: Disassemble to Lubricate each 12,000 miles Disassemble to lubricate each 12,000 miles Check each 2,000 miles Change each 20,000 miles Check each 2,000 miles Change each 12,000 miles Each 12,000 miles Each 12,000 miles Each 2,000 miles Disassemble to lubricate each 12,000 miles Each 2,000 miles Each 2,000 miles Each 2,000 miles Each 2,000 miles At each breaker point replacement Each 2,000 miles Each 6,000 miles Change each 2,000 miles or 60 days Change each 6.000 miles or 60 days As required As required As required As required As required 1 X A pts. 114 pts. 0,7 ltrs. 2 pts. 1 % pts. 0,9 ltrs. As required As required 2 to 4 Drops As required Several Drops One Drop One Drop 2 c.c. As required 1 M pts. 1 pt. 0,6 ltrs. 4 qt.** 3 H qts. 3,8 ltrs. 4 qt.** 3 }A qts. 3,8 ltrs. Chassis Lubricant Chassis Lubricant MIL-L-2105-B Wheel Bearing Lubricant Wheel Bearing Lubricant GL4 MIL-L-2105-B* Graphite Grease Graphite Grease Engine Oil Graphite Grease Engine Oil Engine Oil Engine Oil Cam Lubricant Cam Lubricant Engine Oil Engine Oil Engine Oil No. 1 No. 1 No. 1 No. 1 SAE-80 SAE-80 No. 2 No. 2 No. 2 No. 2 SAE-90 SAE-80 SAE-80 SAE-80 Medium Medium Medium Medium Same as engine Light Same as engine Same as engine Same as engine SAE-40 or 50 ® Above 90°F. Between -f 10°F. and 90°F. Between -10°F. and -fl0°F. Below -10°F. use S A E 30 or 10W-30 use S A E 20W or 10W-30 use S A E 10W or 10W-20 use S A E 5W or 5W-20 BE St Not lower than 32°F. [0 8 C] Between 32°F. 10°C] and 0°F. l-17°CI Below 0°F. [-17°C] use S A E 20W or S A E 10W-30 use S A E 10W or S A E 10W-30 use S A E 5W or S A E 5W-20 •For Powr-Lok and Trac-Lok differential use only 'Jeep' Differential Oil, Part No. 94557. **When oil filter is changed at the same time, add one quart {one ltr.]. (x)Do not mix lithium and sodium base lubricants. Use lithium base lubricants as specified. 9

B LUBRICATION B-2. Special Lubricants Special lubricants are required for certain lubrication points on the 'Jeep' Universal vehicles. The special lubricants are necessary for proper function- ing and maintenance of the vehicle. The Lubrica- tion Chart (Fig. B-l and B-2) designates the special lubricating points and identifies them by type or part number. B-3. Applying Fresh Lubricant When servicing or lubricating the vehicle, it is important that all old lubricant and dirt be removed from the fitting and/or plugs before servicing and that the recommended type of lubricant be used for the particular item being serviced. Force lubricant through the lube fittings until the lubricant being forced out of the joint is fresh lubricant, indicating that all old lubricant has been removed. B-4. Engine Lubrication System — Hurricane F4 Engine • Refer to Fig. B-3. The engine oil pressure system is designed to provide adequate lubrication to all working parts of the engine. The gear-type oil pump is driven from the engine camshaft. The pump is provided with a FIG. B-3—ENGINE LUBRICATION SYSTEM — HURRICANE F4 ENGINE floating, screened intake that prevents the circula- tion of any sediment that might accumulate in the oil pan. By means of this pump, the main bearing journals and crankpins are efficiently lubricated through an oil gallery and passages in the cylinder block. Oil is forced under pressure to the main bearings and through the cheeks of the crankshaft to the connecting rod bearings. Oil is also force-fed to the camshaft bearings, timing gears, and intake valve rocker arms. The oil pressure is controlled by relief valve located in the oil pump. The valve is designed to open when excessive pressure develops in the system, relieving the pressure and returning the excess oil to the oil pan. The cylinder walls, piston pins, and tappets are supplied with oil from spurt holes in the connecting rods. A portion of the oil is continually passed through an oil filter which effectively removes any foreign matter sus- pended in the oil. A flanged section on the rear of the crankshaft acts as an oil slinger and, in com- bination with the rear main bearing upper and lower oil seal, prevents the leakage of oil from the rear end of the cylinder block. Leakage of oil from the front end of the cylinder block is controlled by the crankshaft oil slinger and the front oil seal installed in the timing gear cover. The oil pressure indicator light in the instrument panel and the oil level gauge or dip stick in the side of the engine provide a means for checking the oil pressure and oil level. B-5. Oil Pressure Gauge or Indicator On early CJ-3B vehicles an oil pressure gauge is mounted on the instrument panel. This gauge indicates the oil pressure within the engine lubricating system. On Models CJ-5, CJ-5A, CJ-6, CJ-6A, DJ-5, DJ-6 and later production vehicles of Model CJ-3B a red telltale lamp, which operates when the ignition switch is turned on, is lit when there is insufficient oil pressure to properly lubricate the engine. When it goes out, operating pressure is achieved. In normal operation, the light is lit when the ignition is first turned on. It goes out after the vehicle is in motion. Failure of the gauge or indicator to register normal oil pressure may indicate insufficient supply of oil in the engine crankcase, low or no oil pump pressure, or a fault in the gauge or indicator electrical circuit. The engine must be stopped immediately to prevent possible damage to engine bearings and the fault corrected before restarting the engine. B-6. Engine Lubrication System — Dauntless V-6 Engine The engine lubrication system (Fig. B-4) is the force feed type in which oil is supplied under pressure to the crankshaft, connecting rods, camshaft bearings and valve lifters. Oil is supplied under controlled volume to the rocker arm bearings and push rods. All other moving parts are lubricated by gravity flow or splash. The supply of oil is carried in the oil pan which is filled through a filter opening in the right rocker arm cover. A removable oil gauge rod on the left side of the crankcase is provided to check oil level. The oil pump is located in the timing chain cover 10

1953-1968 Jeep CJ-3B Service & Repair Manual

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