Water pump bolt
Tightening procedure
- Torque 11 lb-ft · 15 N·m
- Torque 22 lb-ft · 30 N·m
Complete the passes in the order shown. Angle passes are turn-of-the-nut steps measured with an angle gauge after the preceding torque pass.
Tools
- socket
Notes
Gen IV value (22 lbft). LT-generation pumps differ. Catalog PN: GM 12551926 per figure GM00-565 callout 325 (LS3) and 301 (LS3+LS7) — "BOLT,W/PMP(M8X1.25X83) — Required: 06, Y 6.2W(LS3) (2008-2011). M8x1.25 thread, 83mm long. The 6 long bolts that secure the water pump to the front cover." length_mm lifted into the structured field on 2026-06-04 from the GM parts descriptor already quoted above (M8X1.25X83); the third number is the bolt length in mm. Cross-checked against the chevrolet-parts-canada parts catalog (captured 2026-05-28), whose blocked detail pages and callout-only diagrams do not separately state this length, so the value rests on the GM Professional Parts Catalog descriptor.
Sources
- GM Fastener Tightening Specifications (6.2L LS3), Document ID 2296270
- 2011 Chevrolet Corvette Parts Catalog (GM Professional, Dec-11 supersedes May-11)
Values are cited as facts. We do not reproduce the manufacturer's prose, table layout, or diagrams.