What are the torque specs for head bolts on a 5.3L Chevrolet?

The torque specifications for the head bolts on a 5.3L Chevrolet engine may vary depending on the specific model and year of the vehicle. Here are the general torque specifications for head bolts on some common 5.3L Chevrolet engines:

1. 5.3L Chevrolet LS4 Engine (2005-2007):

- Step 1: 22 ft-lb (30 Nm)

- Step 2: 44 ft-lb (60 Nm)

- Step 3: 66 ft-lb (90 Nm) + 90 degrees

- Final Step: 66 ft-lb (90 Nm) + 90 degrees

2. 5.3L Chevrolet L33 Engine (2008-2013):

- Step 1: 22 ft-lb (30 Nm)

- Step 2: 44 ft-lb (60 Nm)

- Step 3: 66 ft-lb (90 Nm) + 90 degrees

- Final Step: 66 ft-lb (90 Nm) + 90 degrees

It's important to note that these are general guidelines, and the actual torque specifications may vary based on the specific engine variant and model year. Refer to the vehicle's service manual or consult with a certified mechanic to obtain the exact torque specifications for your specific 5.3L Chevrolet engine.