GM Genuine Engine Components and Tightening Fasteners - Cylinder Head Repairs
If you are working on any engine cylinder repairs for replacement or to optimize the operation of the engine – fasteners are an important part to consider.
Here are the different types of methods for tightening fasteners and why certain fasteners must be replaced.
There are three different methods for the specification of tightening fasteners:
1. Torque (T): Is a fastener with a Torque (T) specification that can be tightened with a conventional torque wrench.
Tip: Generally, externally threaded fasteners (bolts, screws, studs) tightened to this specification method can be reused, unless otherwise specified in the Service Information.
2. Torque Plus Angle (TA): Is a fastener with a Torque Plus Angle (TA) specification that must be tightened first to the torque part of the specification and then must be tightened further by the addition of the specified angle.
Tip: Generally, externally threaded fasteners tightened to this specification method can be reused, unless otherwise specified in the Service Information.
3. Torque Plus Angle to Yield (TAY) Is a fastener with a Torque Plus Angle to Yield specification. The (TAY) is tightened in the same way as the fastener with the Torque Plus Angle (TA) specification.
The difference between a Torque Plus Angle (TA) specification and a Torque Plus Angle to Yield (TAY) specification is the tightening results in permanent deformation of the externally threaded fastener.
Tip-Replace the Bolt: Externally threaded fasteners tightened to this specification method must not be reused and must ALWAYS be replaced if loosened. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
Popular GM Genuine Engine Cylinder Head Bolt – Part Number 11546959
The next time you’re looking for a bolt for a GM vehicle, ask your supplier for Part Number 11546959.
This part covers 127 applications of GM vehicles and is the TAY bolt that fit your repair for Cadillac, Chevrolet and GMC vehicles. Ensure to use the CONNECTION catalogue to search for related parts.
Related Parts - Part No. 11611976 engine cylinder head bolt may also need to be ordered for this same repair on certain applications depending on engine code and covers 98 GM applications.
For more Tech Tips, visit our blog page by clicking here.
If you are working on any engine cylinder repairs for replacement or to optimize the operation of the engine – fasteners are an important part to consider.
Here are the different types of methods for tightening fasteners and why certain fasteners must be replaced.
There are three different methods for the specification of tightening fasteners:
- Torque (T)
- Torque Plus Angle (TA)
- Torque Plus Angle to Yield (TAY) - sometimes referred to Torque To Yield (TTY)
1. Torque (T): Is a fastener with a Torque (T) specification that can be tightened with a conventional torque wrench.
Tip: Generally, externally threaded fasteners (bolts, screws, studs) tightened to this specification method can be reused, unless otherwise specified in the Service Information.
2. Torque Plus Angle (TA): Is a fastener with a Torque Plus Angle (TA) specification that must be tightened first to the torque part of the specification and then must be tightened further by the addition of the specified angle.
Tip: Generally, externally threaded fasteners tightened to this specification method can be reused, unless otherwise specified in the Service Information.
3. Torque Plus Angle to Yield (TAY) Is a fastener with a Torque Plus Angle to Yield specification. The (TAY) is tightened in the same way as the fastener with the Torque Plus Angle (TA) specification.
The difference between a Torque Plus Angle (TA) specification and a Torque Plus Angle to Yield (TAY) specification is the tightening results in permanent deformation of the externally threaded fastener.
Tip-Replace the Bolt: Externally threaded fasteners tightened to this specification method must not be reused and must ALWAYS be replaced if loosened. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.
Popular GM Genuine Engine Cylinder Head Bolt – Part Number 11546959
The next time you’re looking for a bolt for a GM vehicle, ask your supplier for Part Number 11546959.
This part covers 127 applications of GM vehicles and is the TAY bolt that fit your repair for Cadillac, Chevrolet and GMC vehicles. Ensure to use the CONNECTION catalogue to search for related parts.
Related Parts - Part No. 11611976 engine cylinder head bolt may also need to be ordered for this same repair on certain applications depending on engine code and covers 98 GM applications.
For more Tech Tips, visit our blog page by clicking here.