Connecting rod bolt
Torque-to-yield. This fastener is tightened past its elastic limit and permanently stretches. Always install a new one — a reused TTY bolt will not clamp to spec.
Tightening procedure
- Torque 15 lb-ft · 20 N·m
- Angle 85°
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
- 12-point socket
- angle gauge
Notes
Torque-to-yield. Second-design (most common, incl. LS3) final pass 85 degrees; first design 60 degrees (variant). Catalog PN: GM 11570662 per figure 1Y00-083 callout 102 — "BOLT,CONN ROD(MJ9X44,13 THD,15.5 OD,12.9,PL) — Required: 02 per rod (16 total), Y 6.2W(LS3) (2008-2011). Grade 12.9, 9mm metric J-thread, 44mm length, 13 threads, 15.5mm OD. Phosphate/lubricant pre-applied." Socket: 12-point drive (stock and ARP LS rod bolts use a 12-point head); provisional.
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.