What should you do if you notice that head bolts are not tightened in sequence?

When head bolts are not tightened in sequence, it is essential to follow the standard tightening sequence. This practice is critical because tightening bolts out of order can lead to uneven pressure on the cylinder head, which can result in warping or damage to the engine components.

Following the correct sequence ensures that the cylinder head is seated evenly against the engine block, allowing for proper sealing of the gaskets and preventing issues like oil leaks or coolant leaks. The recommended sequence is typically outlined in the vehicle's service manual and is designed based on the engine's specific design to distribute stress uniformly.

Ignoring the issue can lead to more significant problems down the road, and while re-torquing them manually might seem like an option, it does not guarantee that the pressure will be applied evenly without following the proper sequence. Consulting a mechanic may also be helpful, but adhering to the standard tightening sequence is a proactive step that can prevent potential engine malfunctions.