Used Car Engine Knocking: Checks to Make Before Buying

Swan.my.id - Jakarta, used car engine knocking is one condition prospective buyers should check before completing a purchase. The symptom may indicate an engine problem and deserves attention during an inspection.

Engine condition remains an important parameter when choosing a used car. Buyers should not only look at the vehicle’s appearance, but also pay attention to how the engine behaves while idling and during acceleration.

Hans Steven, owner of Speed'Z Performance, a specialist workshop in Cipondoh, Tangerang, explained several signs that can help identify engine knocking. The check can begin while the engine is idle and continue with a short driving test.

Used Car Engine Knocking Requires an Idle Check

According to Hans, knocking symptoms can be felt when the engine is running at idle. This makes the initial inspection possible even before the car is driven.

After the engine reaches its normal operating temperature, observe whether the engine speed remains unstable. If the revs continue to fluctuate, the condition may indicate knocking and should be examined further.

Buyers can also observe the engine directly from the engine compartment. An engine that continues to shake while the car is idling may be a warning sign during the inspection.

Compare Engine Movement During Different Conditions

Hans explained that a normal engine may shake when the car is started and when the accelerator pedal is pressed. However, the movement should not continue in the same way while the vehicle remains at idle.

Because of that, buyers need to compare the engine’s movement at several moments. First, watch the engine immediately after starting. Then, allow it to reach normal temperature and check whether the shaking or unstable engine speed remains.

This simple comparison can help reveal a condition that may not be obvious from the exterior of the car. It also gives buyers a clearer basis for deciding whether the vehicle needs a more detailed inspection.

Continue the Check with a Short Drive

The inspection should not stop at the idle position. From idle, the buyer can drive the car and press the accelerator pedal through a kickdown action, as suggested by Hans.

This step allows the engine to be observed under a different condition. Buyers should pay attention to the engine’s response while the accelerator is pressed and compare it with the behavior noticed during idle.

If the engine shows suspicious symptoms during these checks, prospective buyers should avoid making a quick decision. The signs should be considered before proceeding with the purchase, especially because engine knocking can be an indication of engine damage.

Why the Inspection Matters

Engine problems can affect the value and condition of a used car. Therefore, checking for knocking symptoms should become part of the buying process rather than an optional step.

The inspection does not require complicated equipment at the initial stage. Buyers can begin by listening and observing the engine at idle, waiting until it reaches normal temperature, and continuing with a controlled drive.

By following these checks, buyers can identify warning signs earlier. A careful inspection also helps prevent the engine’s condition from being overlooked simply because the vehicle looks good from the outside.

In short, unstable engine speed after reaching normal temperature, continued shaking while idling, and suspicious behavior during kickdown deserve attention. These signs should be evaluated carefully before a used car purchase is finalized.