What size thread is a 2azfe head bolt?
The typical thread size for a 2AZ-FE cylinder head bolt is M12 x 1.25. This thread specification is commonly used on Toyota’s 2AZ-FE 2.4L engines found in models such as the Camry, RAV4, and Highlander, though you should verify the exact spec for your year and market.
The Toyota 2AZ-FE is a 2.4-liter inline-four introduced in the mid-2000s and used across several Toyota platforms. Like most modern engines, its cylinder head is secured with high-strength bolts whose size and pitch are standardized to the engine design. Variations can exist between model years, regions, and revisions, so consulting the official service manual or checking the bolts you have on hand is advisable before purchasing replacements.
Details you should know about the bolt size
Below is a concise overview of the key aspects related to the 2AZ-FE head bolts and where the thread size fits into the broader servicing context.
- Thread size and pitch: M12 diameter with a 1.25 mm pitch.
- Bolt type: high-strength cylinder-head bolts designed for Toyota engines.
- Replacement practice: in many cases, head bolts are specified as single-use; always follow the service manual’s guidance for re-use or replacement.
- Model/year variation: while M12 x 1.25 is typical, confirm the exact specification for your specific vehicle and production year.
In summary, knowing the standard thread size helps when sourcing bolts or evaluating a repair kit, but always verify against your vehicle’s official documentation or OEM fastener kit to ensure exact compatibility.
Summary
The 2AZ-FE head bolts commonly use an M12 x 1.25 thread size, a standard for many Toyota 2AZ-FE applications. Because engine revisions can vary by year and market, always confirm with the vehicle’s service manual or OEM fastener spec before purchasing or installing new head bolts.
