1942 - 1947 Chevrolet Shop Manual



	6-1

	*Section 6* ENGINE

	The engine used in all 1942 passenger cars and trucks is a six-cylinder, valve-in-head type. The regular production engine for passenger cars and all trucks has a displacement of 216.5 cubic inches, using a 3-1/2" bore and 3-3/4" stroke. For 1-1/2-ton trucks only a heavy duty optional engine is available. This engine has a displacement of 235.5 cubic inches using a 3-9/16" bore and 3-15/16" stroke. All parts of the two engines are interchangeable with exception of the following parts. Cylinder block and Crankcase, crankshaft, camshaft, pistons and pins, all piston rings, oil pump screen cover support, oil pan pipe assembly, oil pan, oil distributor to valve rocker shaft pipe, valve lifters and push rods. Service operations on the two engines are performed in exactly the same manner, and all checks and clearances, with exception of the connecting rod oiling system, are the same on the two engines. The only additional tool required on the heavy duty engine is the J-1646 oil trough depth and connecting rod dipper height gauge. REMOVE ENGINE ASSEMBLY FROM CHASSIS [Except Cabriolet and Truck) 1. Drain the radiator and cylinder block. Remove the hood. Remove front bumper. 2. Disconnect headlamp, parking lamp, and horn wires at the junction blocks. Disconnect hood latch control wire and conduit at latch. 3. (On both sides.) Remove one bolt attaching rear lower flange of side baffle to frame; two bolts at hood hinge spring bracket to fender; one bolt at top of fender to cowl bracket, and the fender-to-frame brace bolt at fender. Under fender remove three fender rear baffle bolts to fender. Remove bolt at front end of body sill molding, and the step plate to fender bolt. 4- Remove the lower and upper radiator hose connections. Remove the two nuts from the radiator support bolts. Lift off the radiator and fenders as an assembly. 5. Disconnect the generator and field wires from the generator, release the wiring loom from its clip. Remove the battery and cables. 6. Disconnect the primary wire from the distributor and the high tension lead from the coil. Remove the two screws which mount the coil and lay the coil back on the cowl.	7. Disconnect the gasoline line from the fuel pump. Disconnect the throttle and choke controls from the carburetor and the accelerator rod from the bell crank. Disconnect windshield wiper vacuum line at intake manifold. 8. Disconnect the exhaust pipe from the exhaust manifold. 9. Remove the vacuum and air hoses from the vacuum cylinder. 10. Remove the floor mat and cover over the transmission from the body floor. Then, working from underneath the car, remove the two bolts which fasten the two halves of the reactionary lever assembly metal boot together and remove the outer half of the boot. 11. Loosen the bolt which clamps the reactionary lever assembly to the transmission operating shaft and carefully drive the reactionary lever assembly from the shaft. 12. Remove the cotter pin from the transmission end of the selector rod and disconnect rod from the selector lever. Remove the three cap screws attaching the vacuum cylinder bracket to the side of the transmission and move the whole assembly away from the transmission. 13. Remove the cotter pin from the clutch pedal link, remove the link and pull-back spring. 14. Remove the bolts from the universal joint ball retainer and slide the retainer and ball back on the propeller shaft housing. Remove the four cap screws from the universal joint trunnion bearings. Remove the trunnion bearings. 15. Remove the four bolts from the transmission rear support. 16. Remove the front and side engine mounting bolts. Remove the bolts from the starter cross shaft. 17. Remove the third cylinder head bolt from the rear on the left side and install the engine lifting eye bolt. Attach a chain hoist, raise the engine clear of its mountings, then pull it forward. Again raise the engine sufficiently to clear the frame front cross member. The chassis may then be rolled back to clear the engine. To replace the engine in the chassis the removal operations are just reversed. REMOVE ENGINE ASSEMBLY FROM CHASSIS (Cabriolet) Because of the difference in design between the regular passenger car frame and the Cabriolet