I 250 ENGINE ASSEMBLY 0 000 ENGINE ASSY V NOTE When installing the following engines on applicable past models non interchangeab e parts must r V be discarded and replaced with parts that fit the replacing engine See Engine Installation Instruction Charts in the General information Section of The Parts book for parts and instructions necessary with service engines on past model information 66 89 All 250 Q 6263028 1 less dist flywheel clutch housing and all V clutch components The above engine assemblies o not include the following sub asse b ies Carburetor Fan Blade and Pulley Ignition Wiring V V I Fuel Pump Generator Starting Motor I I I Oil Filter Assy I Ignition Coil Ventilator Assy I I I V NOTE Special equipment production assemblies are available while in production through GMPD Otterburn on direct order Form PC 785 V 0 002 LOCK BOLT SPACER Engine Mounting Small Attaching 66 72 Ser 10 thru 30 250 exc A T 3783763 1 2 rear mtg bolt 71 72 All Blazer 3968696 2 BOLT eng frt mtg to eng mtg frame I I brkt N 14 x 1 72 G 10 thru 30 334972 2 BOLT engjfrt mtg to eng mtg eng brkt I In 7 14X5 I I 66 72 Ser 10 thru 30 Blazer 250 V exc A T V 3769338 2 SPACER rear mtg u x 2 long 71 G 10 thru 30 w A T 3968673 1 SPACER 0 010 GASKET UNIT Engine or Tune Up NOTE 1 The above Engine Small Parts Gasket Units togetherwith Oil Pan Gasket Unit Group 1 429 and Cylinder Head Gasket Unit Group 0 289 provide all necessary Gaskets for complete engine overhaul I NOTE 2 Unit consists of I 1 Crankcase front end cover gasket 1 Crankshaft front oil seal assy 1 Water I pump gasket 1 Oil pump cover gasket 1 Exhaust manifold to inlet manifold gasket and 2 Crankshaft rear oil seals I I NOTE 3 1 Fuel pump flange also included in this unit I 66 67 All 250 I L 3834936 1 engine Notes 1 2 3 I 86 72 All Blazer 250 exc L P Gas 6259390 1 Notes 1 2 3 V 69 72 All w L P Gas 250 I 6259389 1 Notes 1 2 Q 0 027 MOUNTING Engine Also see Group 4 081 66 72 SerZ I0 thru 30 Blazer 250 I exo A T 3705444 2 rear upper Ident No 3705444 66 72 Ser 10 thru 30 Blazer 250 I I I exc A T 3789949 2 rear lower ldent No 3789949 66 72 All Blazer 250 3990332 2 front V 72 G 10 thru 30 6282208 2 front I 0 029 BRACKET SUPPORT Engine Mounting 87 72 Ser 10 D D 250 I V 86 72 Ser 10 thru 30 Blazer C I 250 exc D D 4 WD 3822663 L H frt mtg to frame eft i 87 72 Ser 10 D D 250 V I 66 72 Ser 10 thru 3 0 Blazer C I I I 250 exc 4 WD D D I 3822664 R H frt mtg to frame right 87 70 G 10 20 250 I 3682397 L H engine mtg support left 67 70 G 10 20 250 r 3882398 R H engine mtg support right I 66 72 Ser 20 30 D D 250 3916783 L H I frt mtg to frame left 87 72 4 WD Blazer K 250 3906536 R H frt mtg to frame right 67 72 4 WD Blazer K 250 3906535 L H frt mtg to frame left 66 72 Ser 20 30 D D 250 3916784 R H right front frame 71 72 G 10 thru 30 8262596 R H eng front mtg R H V I 71 72 G 10 thru 30 6262597 L H eng front mtg L H I I 72 G 10 thru 30 6271201 L H eng front mtg eng L H 66 72 Ser 1 0 thru 30 Blazer 250 3790292 R H I BRACKET ASSY engine front mtg right 66 72 Ser 10 thru 30 Blazer 250 3790291 A R BRACKET ASSY engine front mtg left 67 70 G 10 20 250 3882396 1 SUPPORT engine 67 72 4 WD Blazer K 250 3906533 I1 SUPPORT engine front 0 033 BLOCK ASSEMBLY Cylinder NOTE CAUTION Combination not appearing below should be checked in the Engine Series Number and V V Suffix Chart of the Parts book to determine if the combination was available in production lf not V available no attempt should be made to make the installation I PARTIAL ENGINE NOTE Includes block crankshaft camshaft timing gears pistons and connecting rods 66 72 All Blazer 250 exc L P Gas I NB 2 I 374853 1 Note 1 I 66 72 All Blazerw NB 2 250 exc I L P Gas I 6272130 1 V V V GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TL V REV 5 79 V 0 25 0 000 0 033