Vortec 8100 GM Engine - OEM Parts List - 8.1L L4

Oct 25, 2026

8.1L L4 Vortec 8100 GM engine OEM parts list covering engine assembly sections for 2001-2004 and related service operations. The listing provides detailed item names and specifications for internal components such as piston rings, pistons with connector rods, connection rod bolts, bearing kits, nuts, retainers, pins, and plugs, including standard and oversize options and floating pin piston design variants. It also includes service notes about transferring the flywheel from the original engine.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages30

Reading Time1 h 16 min

AccessFree to download

Engine ASM-V8 Part 1

Illustrations and parts items

Engine ASM-V8 Part 2

Illustrations and parts items

| | 8.1L L4 OEM PARTS LIST | | --- | --- | ILLUSTRATION INDEX TITLE PAGE I ENGINE ASM-V8 PART 1 (L18)(8 . 1L)(496 CID) 0-158 I ENGINE ASM-V8 PART 2 (L18)(8 . 1L)(496 CID) 0-173 OM00-032 2001-2004 I ENGINE ASM-V8 PART 1 (L18)(8.1G)(496 CID) 1. 0.643 RING KIT,PSTN(STD)(*1,2,3,4,5)(ALSO PART OF \#1) 01-04 I (L18) 8 88894226 (STD) ~~ ~~ 2003 GENERAL MOTORS SERVICE OPERATIONS-OEM PARTS LIST-OEM ~~ ~~ (3-04) 0-158 00.000-GROUP 0.643 RING KIT,PSTN(STD)(*10,11,12,13,14)(ALSO PART OF \#1)(STD) 0.643 RING KIT,PSTN(STD)(*16,17,18,19,20)(ALSO PART OF \#1)(STD) 0.643 RING KIT,PSTN(0 .030" O/S)(*1,2,3,4,5)(ALSO PART OF \#1)(0.030" O.S.) 0.643 RING KIT,PSTN(0 .030" O/S)(*10,11,12,13,14)(ALSO PART OF \#1)(0.030" O.S.) 2. 0.629 PISTON,(W/CONN ROD)(*1,2,3,4,5)(INCLS 1,2,3,4,7)(STD)(PISTON IS PRESS PIN DESIGN) 0.629 PISTON,(W/CONN ROD)(*1,2,3,4,5)(INCLS 1,2,3,4,7)(STD)(PISTON IS PRESS PIN DESIGN) 0.629 PISTON,(W/CONN ROD)(*10,11,12,13,14)(INCLS 1,2,3,4,7)(STD)(PISTON IS PRESS PIN DESIGN) 0.629 PISTON,(W/CONN ROD)(*10,11,12,13,14)(INCLS 1,2,3,4,7)(STD)(PISTON IS PRESS PIN DESIGN) 0.629 PISTON,(W/CONN ROD)(0 .030" O.S. )(*1,2,3,4,5)(INCLS 1,2,3,4,7) (INCLS:ROD,CAP,BOLT,NUT,RINGS,LUBRICANT) 0.629 PISTON,(W/CONN ROD)(0 .030" O.S. )(*1,2,3,4,5)(INCLS 1,2,3,4,7)(0.030" O.S.) (INCLS:ROD,CAP,BOLT,NUT,RINGS,LUBRICANT) 0.629 PISTON,(W/CONN ROD)(0 .030" O.S. )(*10,11,12,13,14) (INCLS 1,2,3,4,7) (INCLS:ROD,CAP,BOLT,NUT,RINGS,LUBRICANT) 0.629 PISTON,(W/CONN ROD)(0 .030" O.S. )(*10,11,12,13,14) (INCLS 1,2,3,4,7)(0 .030" O.S. ) (INCLS:ROD,CAP,BOLT,NUT,RINGS,LUBRICANT) 0.629 PISTON,(*16,17,18,19,20)(FOR USE WITH FLOATING PIN PISTON DESIGN ONLY) 0.636 PIN,PSTN(*16,17,18,19,20)(FOR USE WITH FLOATING PIN PISTON DESIGN ONLY) 0.639 RETAINER,PSTN PIN(*16,17,18,19,20)(FOR USE WITH FLOATING PIN PISTON DESIGN ONLY) 3. 0.623 BOLT,CONN ROD(*1,2,3,4,5)(ALSO PART OF 2) 0.623 BOLT,CONN ROD(*10,11,12,13,14)(ALSO PART OF 2) 0.623 BOLT,CONN ROD(*16,17,18,19,20)(ALSO PART OF 2) 4. 0.603 ROD,CONN(*16,17,18,19,20)(FOR USE FLOTING PIN DESIGN ONLY)(FOR USE WITH FLOATING PIN PISTON DESIGN ONLY) 5. 0.616 BEARING KIT,CONN ROD(*1,2,3,4,5)(STD) 0.616 BEARING KIT,CONN ROD(*10,11,12,13,14)(STD) 0.616 BEARING KIT,CONN ROD(*16,17,18,19,20)(STD) 04 04 01-04 04 01-04 01-04 04 04 01-04 01-04 04 04 04 04 04 01-04 04 04 04 01-04 04 04 I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) I (L18) OM00-032 8 88894226 8 88894226 8 88893910 8 88893910 LH 12569473 RH 12569474 LH 12569473 RH 12569474 LH 12569477 RH 12569478 LH 12569477 RH 12569478 8 12583276 8 12583280 8 12583284 16 12556558 16 12556558 16 12556558 8 12583281 8 88894270 8 88894270 8 88894270 ~~ ~~ 2003 GENERAL MOTORS SERVICE OPERATIONS-OEM PARTS LIST-OEM ~~ ~~ (3-04) 0-159 00.000-GROUP OM00-032 7. 8. 9. 10. 15. 0.626 0.626 0.626 0.000A 0.000A 0.000A 0.000A 0.000A 0.000A 0.000A 0.000A 0.000A 0.000A 1.531 1.531 1.531 0.553 0.553 0.553 1.531 NUT,CONN ROD(*1,2,3,4,5)(ALSO PART OF 4) NUT,CONN ROD(*10,11,12,13,14)(ALSO PART OF 4) NUT,CONN ROD(*16,17,18,19,20)(ALSO PART OF 4) ENGINE,GASOLINE(GOODWRENCH)(*11,12)(SERVICE NOTE:MAY REQUIRE FLYWHEEL TO BE TRANSFERRED FROM ORIGINAL ENGINE) ENGINE,GASOLINE(GOODWRENCH)(*13,14)(SERVICE NOTE:MAY REQUIRE FLYWHEEL TO BE TRANSFERRED FROM ORIGINAL ENGINE) ENGINE,GASOLINE(GOODWRENCH)(*17,18)(SERVICE NOTE:MAY REQUIRE FLYWHEEL TO BE TRANSFERRED FROM ORIGINAL ENGINE) ENGINE,GASOLINE(GOODWRENCH)(*19,20)(SERVICE NOTE:MAY REQUIRE FLYWHEEL TO BE TRANSFERRED FROM ORIGINAL ENGINE) ENGINE,GASOLINE(GOODWRENCH)(*2,3)(SERVICE NOTE:MAY REQUIRE FLYWHEEL TO BE TRANSFERRED FROM ORIGINAL ENGINE) ENGINE,GASOLINE(GOODWRENCH)(*2,3)(SERVICE NOTE:MAY

FAQs

What engine family and displacement does the parts list focus on?

The list targets an 8.1L L4 Vortec 8100 GM engine assembly. It references engine ASM-V8 sections with the 8.1L (496 CID) configuration.

Which types of internal components are included?

It includes items such as piston rings, pistons with connector rods, connection rod bolts, bearing kits, nuts, pins, retainers, and connection rod components. It also lists engine oil gallery plugs with various thread and material specifications.

Does the document mention any service procedure note?

Yes. It includes service notes stating that a flywheel transfer from the original engine may be required for certain engine components.

Oct 25, 2026

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