---
title: What Are the Torque Specifications and Tightening Sequences for BluePrint Ford, Small Block Chevy, and LS Engine Cylinder Heads?
description: Torque specifications and bolt tightening sequences for BluePrint Ford, Small Block Chevy, and LS cylinder heads and LS intake manifolds.
---

[Skip to content](https://knowledgebase.blueprintengines.com/knowledge/what-are-the-torque-specifications-and-tightening-sequences-for-blueprint-ford-small-block-chevy-and-ls-engine-cylinder-heads#main-content)

English

Show submenu for translations

![IN CRATE ENGINES..png\]](https://knowledgebase.blueprintengines.com/hs-fs/hubfs/IN%20CRATE%20ENGINES..png?height=40&name=IN%20CRATE%20ENGINES..png)

Open main navigation

Close main navigation

- English
  
  Show submenu for translations
- Go to www.blueprintengines.com

 Go to www.blueprintengines.com

 How can we help you?

- There are no suggestions because the search field is empty.

1. [Knowledge Base](https://knowledgebase.blueprintengines.com/knowledge?hsLang=en)
2. [Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/engine-specs?hsLang=en)

# What Are the Torque Specifications and Tightening Sequences for BluePrint Ford, Small Block Chevy, and LS Engine Cylinder Heads?

### ***Ford 302-347 and 407-427 Cylinder Head Torque Sequence***

Tighten head bolts from the center outward using the sequence shown below: **Top Row:** 9 → 5 → 1 → 3 → 7  
**Bottom Row:** 10 → 6 → 2 → 4 → 8

### Ford 302-347 Head Bolt Torque

 Torque the cylinder head bolts in three steps:

1. **40 ft-lbs**
2. **60 ft-lbs**
3. **80 ft-lbs Final Torque**

### Ford 407-427 Head Bolt Torque

 Torque the cylinder head bolts in three steps:

1. **40 ft-lbs**
2. **70 ft-lbs**
3. **100 ft-lbs Final Torque**

---

### ***Small Block Chevy Cylinder Head Torque Sequence***

Follow the numbered sequence shown below, starting with the center fasteners and working outward.

### SBC Head Bolt Torque

 Torque all cylinder head bolts in three steps:

1. **22 ft-lbs**
2. **44 ft-lbs**
3. **65 ft-lbs Final Torque**

### SBC Rocker Arm Stud Torque

**Torque rocker arm studs to 45 ft-lbs.** **Important:** Apply an oil-resistant RTV sealant to all intake-side rocker arm studs during installation.

---

### ***LS Cylinder Head Torque Sequence***

Follow the tightening sequence shown in the LS Head Bolt Tightening Sequence diagram.

### LS Cylinder Head Torque Procedure

**Short M8 Head Bolts**

- First Pass: **22 ft-lbs**
- Final Pass: **22 ft-lbs + 50 degrees**

**Long M11 Head Bolts**

- First Pass: **22 ft-lbs**
- Second Pass: **90 degrees**
- Third Pass: **70 degrees**

### Important LS Notes

- Always use the proper torque-angle procedure.
- Torque-to-yield head bolts should not be reused.
- Follow the bolt sequence exactly to ensure proper gasket sealing.

---

### ***LS Intake Manifold Bolt Tightening Sequence***

Follow the sequence shown in the LS Intake Manifold Bolt Tightening Sequence diagram.

### LS Intake Manifold Torque Specification

 Torque all intake manifold bolts to: **44 in-lbs (5 N·m) First Pass** **89 in-lbs (10 N·m) Final Pass** Work through the sequence shown and complete both torque passes before installation is considered complete.

---

***Installation Tips***

- Verify all threaded holes are clean and free of debris.
- Apply thread sealant to any fasteners that enter coolant passages.
- Use the lubricant specified by the fastener manufacturer.
- Always torque fasteners in multiple stages.
- Use a calibrated torque wrench.
- Follow aftermarket fastener manufacturer specifications when they differ from those listed above.

 

- [General Support](https://knowledgebase.blueprintengines.com/knowledge/general-support?hsLang=en)
- [Technical Support](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#main-content)

    - [General Engine FAQ](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#general-engine-faq)
    - [BluePrint GM Style Engines](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#blueprint-gm-style-engines)
    - [BluePrint Ford Style Engines](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#blueprint-ford-style-engines)
    - [Transmissions](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#transmissions)
    - [Fuel Systems](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#fuel-systems)
    - [Parts and Accessories](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#parts-and-accessories)
    - [Carburetors](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#carburetors)
    - [Alternator](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#alternator)
    - [Term X](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#term-x)
    - [Valve Train](https://knowledgebase.blueprintengines.com/knowledge/technical-support?hsLang=en#valve-train)
- [Factory Five FAQ](https://knowledgebase.blueprintengines.com/knowledge/factory-five-faq?hsLang=en)
- [Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/engine-specs?hsLang=en)
- [Discontinued Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/discontinued-engine-specs?hsLang=en#main-content)

    - [Engine Support](https://knowledgebase.blueprintengines.com/knowledge/discontinued-engine-specs?hsLang=en#engine-support)

[![Chill listening crop-3](https://knowledgebase.blueprintengines.com/hs-fs/hubfs/IN%20CRATE%20ENGINES..png?width=92&height=24&name=IN%20CRATE%20ENGINES..png "Chill listening crop-3")](http://navy-blueprint-logo)

www.blueprintengines.com Help Center

Copyright © 2026, BluePrint Engines