How should you tighten the bolts when replacing an exhaust manifold?

• A. Randomly until snug
• B. Using hand tight only
• C. According to the TO or manual
• D. With a power tool only

Answer: (C)

When replacing an exhaust manifold, it is essential to tighten the bolts according to the torque specifications provided in the technical orders (TO) or manufacturer's manual. This ensures that the manifold is secured correctly without over-tightening or under-tightening the bolts.

Following the specified torque values is vital as it affects the performance of the manifold and prevents issues such as warping, leaks, or potential damage to the engine components. The manual provides not only the correct torque specifications but often includes the proper tightening sequence, which is crucial for maintaining even pressure across the manifold.

Using the correct method enhances the reliability and longevity of the exhaust manifold and contributes to the overall efficiency of the vehicle's exhaust system.