If you’re rebuilding, refreshing, or re-torquing your Chevy, one thing’s for sure—getting the torque specs right on your small block Chevy 350 is mission-critical. Whether you’re working with a two-bolt or Chevy 350 4‑bolt main block, precision matters.
This guide covers the torque specifications, tightening sequences, and insider tips for a smooth engine build—plus a free Chevy 350 torque specs PDF you can bookmark or print for your garage.
Why SBC Torque Specs Are So Important
The Chevy small block 350 is iconic, but that doesn’t mean it’s bulletproof—especially if you’re guessing bolt torque by feel. Following the proper SBC head torque specs and bolt sequences is the key to avoiding:
- Leaks and blowouts
- Warped heads
- Cracked blocks
- Internal engine damage
When in doubt, always follow the official small block Chevy torque sequence, especially on head gaskets, mains, and intake manifolds.
Chevy 350 Torque Specs (At-a‑Glance Reference)
| Component | Torque Spec | Notes |
| Head Bolts | 65 ft‑lbs | Follow 350 Chevy head bolt torque specs: tighten in 3 steps in spiral sequence from center out |
| Main Bearing Cap Bolts | 70 ft‑lbs (inner), 65 ft‑lbs (outer) | Applies to Chevy 350 4‑bolt main torque specs |
| Connecting Rod Bolts | 40 ft‑lbs | Refer to Chevy 350 connecting rod torque specs |
| Intake Manifold Bolts | 25 ft‑lbs | Criss‑cross pattern |
| Oil Pan Bolts | 12 ft‑lbs | Center‑out pattern |
| Rocker Arm Nuts | 20 ft‑lbs | Use poly locks if applicable |
| Valve Cover Bolts | 7 ft‑lbs | Easy to strip — go light |
| Flexplate/Flywheel Bolts | 60 ft‑lbs + thread locker | Use blue Loctite |
| Timing Cover Bolts | 10 ft‑lbs | Don’t overtighten |
Small Block Chevy Torque Sequence
Always torque in the correct sequence, especially for heads and mains. For the 350 SBC:
- Head bolts: Tighten from the center outward in a spiral pattern.
- Main caps: Inner bolts first, outer bolts second, followed by a criss‑cross pattern.
FAQ: Chevy 350 Torque Specs
What are the torque specs for a small block Chevy 350?
Most commonly referenced SBC torque specs include:
- Head bolts: 65 ft‑lbs
- Main bearing bolts: 70 ft‑lbs inner, 65 ft‑lbs outer
- Rod bolts: 40 ft‑lbs
- Intake bolts: 25 ft‑lbs
Always verify for your specific model year.
What are the Chevy 350 main bearing torque specs?
For a Chevy 350 4‑bolt main engine:
- Inner main cap bolts: 70 ft‑lbs
- Outer bolts: 65 ft‑lbs
Use assembly lube on threads; torque in a criss‑cross sequence.
What are the Chevy 350 connecting rod torque specs?
Standard Chevy 350 connecting rod bolts torque to 40 ft‑lbs. For ARP or aftermarket bolts, follow manufacturer specs.
Where can I get a Chevy 350 torque specs PDF?
Right here! Download our free Chevy 350 torque chart (PDF)—perfect for mobile or print.
Final Torque Tips
- Use a calibrated torque wrench—no guessing.
- Clean and lubricate threads as required (some specs are dry, some wet).
- Don’t mix torque values from different bolt brands—ARP specs are often higher than OEM.