A I 250 ENGINE ASSEMBLY I 1 0 002 LOCK SPACER Engine Mounting 71 72 Ser 40 exc A T 3763763 2 eng rear mtg bolt 71 72 Ser 40 exc A T 3769338 2 SPACER eng rear mtg 0 010 GASKIET UNIT Engine V fw NOTE 1 Unit consists of 1 crankcase front end cover gasket 7 crankcase front end cover seal assy 2 water pump gaskets 1 fuel pump flange gasket 2 crankshaft rear bearing oil seals and 1 therm by pass elbow gasket 71 72 All exc L P Gas 6259390 1 Note 1 71 72 All w L P Gas L 6259389 1 Note 1 0 027 MOUNITING ASSY Engine Also see group 4 081 71 72 Ser 40 3827521 2 front ldent No 3827521 71 72 Ser 40 exc A T 3705444 2 rear upper ldent No 3705444 71 72 Ser 40 3789949 2 rear lower ldent No 3789949 0 029 BRACKET Engine Mounting I 71 72 Ser 40 3891218R H frt mtg frame 71 72 Ser 40 3941499 L H frt mtg frame 71 72 All Q 3790291 L H BRACKET ASSY frt mtg 71 72 All 3790292 R H BRACKET ASSY eng mtg 0 033 BLOCK ASSEMBLY Cylinder W NOTE Combination not appearing be ow should be checked in the Engine Series Number and Suffix Chart in front of catalog to determine if the combination was available in production f not available no attempt should be made to make the installation Q PARTIAI ENGINE Includes Block Crankshaft Timing Gears Pistons and Connecting Rods 71 72 All 374853 1 S I l FITTED CYLINDER BLOCK Includes Block Pistons Pins Rings and Bearings 71 72 All 374210 1 0 034 EXPANSION PLUGS Cylinder Block Also see 8 970 71 72 All 838538 8 wtr jkt bal shaft hole cup shape 1 V O D 71 72 All 3788418 3 cyl hd wtr jkt hole O D cup type 71 72 All 3789860 1 wtr jkt rear 2 O D cup 71 72 All 3835577 1 cyl and case main oil gallery frt hole O D 0 056 BOLT STUD Crankshaft Bearing Cap main 1 q X 39 gz 71 72 All 3852870 STUD No 6 brg cap R H 3 16 x I 14 x 3 4 0 093 PLASTIGAGE Crankshaft Belaringl 71 72 All 1390274A R green pack Type PG 1 12 pcs 0 095 CAP Crankshaft Front Bearinng 71 72 All 3970194 6 No 1 2 3 4 5 6 light blue stripe 0 096 BEARIING UNIT Crankshaft Front 1 Upper and 1 Lower See chart for I model application NOTE See Dealer Price Schedule P A 26 for applicable prices A CRANKSHAFT MAIN BEARING CHART Position STD 001 lIJ S 002 U S 009 U S 010 U S 020 U S 71 72 All All exc Rear 3792553 3792554 3792555 3876072 3792556 3792557 71 72 All Rear 3792558 3792559 3792560 3876073 3792561 3792562 0 105 CAP Ctrankshaft Rear Bearing 71 72 All 3928975 1 R 0 137 SEAL Crankshaft and Rear Elearinig Cap Oil 71 72 All 473424 2 ii GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM REV 5 79 0 4s 0 002 0 137