Final answer:
The tech is LEAST LIKELY to heat the wrist pin when pressing it into the piston and connecting rod. This step is not common as it could result in an improper fit or function.
Step-by-step explanation:
The step a technician is LEAST LIKELY to take when pressing the wrist pin into the piston and connecting rod is d) heating the wrist pin. This step is unconventional because heating the wrist pin could potentially alter its dimensions or material properties, leading to improper fit or function.
Typically, a technician will:
- Align the bores in the piston and connecting rod to ensure proper insertion.
- Heat the small end of the connecting rod, if necessary, to expand it for easier installation of the wrist pin.
- Make sure position marks on the piston and connecting rod are oriented properly for correct assembly.
Heating the small end of the connecting rod is a common practice as it makes the installation of the wrist pin easier by expanding the rod's material temporarily. In contrast, the wrist pin typically needs to remain cool to retain its precision measurement.