CADILLAC SERIES 341-B, BEGINNING ENGINE NO. 322501 PRODUCTION STARTED AUGUST, 1928 DELCO-REMY GENERATING, STARTING SYSTEM DELCO-REMY IGNITION BATTERY:—Exide. Type 3-LXRV-15-2G. 6 volt. Rated capacity is 130 ampere — hours. Starting capacity is 137 amperes for 20 minutes (20 minute rate). Lighting capacity (5 ampere rate) is 5 amperes for 26 hours. The positive (+) terminal is grounded. Battery is mounted on right frame member un- , ao der dust shield. The battery is not interchangeable with the Series 314 battery because the filler plugs are located on the opposite side of the cap. IGNITION :—Coil Model 2195. Distributor Model 4041. Breaker contacts separate .022-.027 inch. They are made of tungsten. Resurface contacts whenever necessary with fine flat contact file or on medium hard oilstone. Dis- tributor is semi-automatic. Maximum manual advance is 38 degrees (en- gine). Automatic advance begins at approximately 1100 R.P.M. Maximum automatic advance is 21 degrees (engine). Breaker arm spring tension is 16-20 ounces. There are two sets of breaker contacts set at an angle of 135 degrees and operating on a four lobed cam. Contacts open alternately at intervals of 45 degrees, corresponding to 90 degrees of crankshaft ro- tation. This is the correct firing interval for the Cadillac engine and must be accurately set. (See Timing). Mounting:—Ignition coil is mounted on side of distributor support. Dis- tributor is mounted at front of engine between cylinder banks. A Blossom Co-incidental ignition switch is used. To remove the distributor, disconnect the primary feed wire, manual advance rod and remove the distributor cap with the high tension cables attached. Then remove the hold-down screw and lift the distributor from place. (NOTE:—The lower end of the distributor shaft has an offset tongue which fits a groove in the top of the driving shaft. Do not try to force the distributor into place as the tongue may be turned 180 degrees from its correct position.) Oiling:—Put 8 or 10 drops of light engine oil in the oiler on the side of the distributor housing every month or 1000 miles. Timing:—Synchronization of Contacts:—Use Delco-Remy Tool, Part No. 822572 and follow directions on Page S-24. This is important and contacts must be synchronized when distributor timing is checked. Timing Distributor to Engine:—One set of breaker contacts begin to sep- arate when the piston entering power stroke reaches a position % inch on the flywheel before top dead center with the spark lever fully advanced. With piston No. 1R in firing position the flywheel mark “IG/A-1-5” will be opposite the indicator on the flywheel case. This mark is ¥% inch be- fore top dead center. To set timing, crank engine over until piston No. 1 enters compression stroke (the up stroke with both valves closed). Fully advance spark lever. Then continue to crank engine until flywheel mark “IG/A-1-5” is opposite the indicator on the case. If contacts are not be- ginning to separate, loosen the taper screw in the center of the cam and rotate cam until one set of contacts open. The other set will be open but Swircn AND LOCK = just closing. Tighten the screw. The second set of contacts open 45 de- 7 pdr leat grees (distributor) after this point with the flywheel mark “IG/A-2-6” op- Sie yee LINE TO KATTION SWITCHUSED ON posite the indicator. Beginning with Series 341-B, engine unit 322501, high compression heads are standard equipment. The flywheel setting remains the same as for former low compression heads (% of an inch before top dead center). The reason for this same setting is that the new distributor 4041 has different advance characteristics which take care of the high compression heads. § VALVE TIMING:—INLET VALVES:—Head ‘diameter, 114 inch; stem diameter, | @)} % inch; stem length, 6 17/64 inches. Valve lift, 23/64 inch. Spring pressure —— STOP LIGHT SWITCH FIRST 1000 CARS ONLY. CADILLAC SERIES 341-B, BEGINNING ENGINE NO. 322501 PRODUCTION STARTED AUGUST, 1928 DELCO-REMY GENERATING, STARTING SYSTEM DELCO-REMY IGNITION 156-164 pounds compressed to 2 5/32 inch. Tappet clearance is .004 inch (cold). Inlet valves open 914 degrees before top dead center and close 584% degrees after lower dead center. Width of valve seat on cylinder block 1/16 inch. EXHAUST VALVES:—Head diameter, 1% inch; stem diameter, % inch; stem length, 6144 inches. Valve lift, 23/64 inch. Spring pressure 156-164 pounds compressed to 2 5/32 inch. Tappet clearance is .006 inch (cold). Exhaust valves open 46 degrees before lower dead center and close 5 de- grees after top dead center. Width of valve seat on cylinder block 5/64 inch. All valve stem guides are removable. No oversize valve stems are supplied. Firing Order:—The firing order is IL-4R-4L-2L-3R-3L-2R-1R. The right hand cylinder bank is right viewed from the driver‘s seat. Number one cylinder is nearest the radiator. Spark Plugs:—Spark plugs are %-18 S.A.E. Standard. All engines are equipped with A.C. type Y special high compressio