Chevy S-10 Head Bolt Torque Specsby Michael Butler
Chevrolet produced the S-10 line of trucks between 1990 and 2004. Originally, the line had regular cab, extended cab and blazer models. The blazer model was discontinued after 1994. A crew cab model was introduced in 2001. In 2004, Chevrolet did away with with the various cab models and just produced one S-10 before discontinuing the entire line the next year. The line featured two different engines: a 2.2 L S4 and a 4.3 L V6.
Head Bolt Torque
Head bolt torque refers to the amount of rotational force that must be applied to the cylinder head bolts for a safe and secure connection either to the engine block or another cylinder head depending upon the engine. After the desired torque is reached, some bolts then require further rotation of a few degrees.
2.2 L S-10
The 2.2 L engine used in the S-10 had two different sizes of bolts: a long and a short size. The long bolts require 46 foot-pounds of torque followed by a rotation of 90 degrees. The short bolts require 43 foot-pounds of torque followed by a 90-degree rotation.
4.3 L S-10 Prior to 1996
Prior to 1996, the head bolts in this vehicle required 65 foot-pounds of torque.
4.3 L S-10 After 1996
This engine had three sizes of bolts referred to as short, medium and long. The short bolts required 22 foot-pounds of torque and then a 55-degree rotation. The medium-head bolts need 22 foot-pounds of torque and a 65-degree rotation. The long cylinder head bolts required 22 foot-pounds of torque and a 75-degree rotation.
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