Answer :
Final answer:
In an overhead cam engine design, pushrods are not used, making them the correct answer to the question. Other components like lifters and rocker arms may still be present depending on the specific engine configuration. Therefore, the answer is OC: Pushrods.
Explanation:
Understanding Overhead Cam Engine Components
An overhead cam (OHC) engine design features the camshaft located above the cylinder head, allowing for direct operation of the engine's valves. In such a configuration, certain components typically found in traditional pushrod engines are absent.
Identifying the Non-OHC Component
When considering the listed components:
- Lifters: These are primarily used in pushrod engines and are not present in OHC designs.
- Rocker arms: Found in both OHC and pushrod engines, as they transfer the motion from the camshaft to the valves.
- Pushrods: Exclusive to traditional valve-train systems; they are not found in OHC engines.
- Timing chains: These are used in both OHC and pushrod engines to synchronize the crankshaft and camshaft.
Given this information, the correct answer to the question is OC. Pushrods, as they are NOT located in an overhead cam engine.
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