Chevy 3.4 head bolt loosening sequence?

There isn't a single, universally applicable Chevy 3.4L head bolt tightening/loosening sequence. The specific sequence depends on the *year* and *model* of the vehicle. The 3.4L engine was used in several different GM vehicles over a period of time, and the cylinder head design (and thus the bolt pattern and tightening sequence) varied slightly.

To find the correct sequence, you MUST:

1. Identify the exact year and model of your vehicle. This is crucial.

2. Find a reliable repair manual specific to that year and model. This manual will contain the correct torque specifications and the tightening/loosening sequence for your engine's cylinder head. Common sources include:

* Chilton's Repair Manual: Available online and in auto parts stores.

* Haynes Repair Manual: Similar to Chilton's.

* Factory Service Manual (FSM): These are the most accurate but can be harder to find and more expensive. Online resources sometimes offer these for download.

Why you can't rely on a generalized answer: Incorrect tightening/loosening sequence can lead to warped cylinder heads, blown head gaskets, and significant engine damage. Don't risk it. Always use the correct sequence from a reputable source.

General Note: The loosening sequence is usually the *reverse* of the tightening sequence. The repair manual will clearly show both.