What are typical compression test reading for a diesel engine in good condition?

The typical compression test readings for a diesel engine in good condition can vary depending on the engine's make, model, and size. Generally, the compression pressure for a diesel engine should be between 280 and 450 pounds per square inch (psi). However, it's important to consult the manufacturer's specifications for your specific engine to determine the recommended compression pressure range.

Here's a table showing the typical compression test readings for some common diesel engines:

| Engine Type | Compression Pressure (psi) |

|---|---|

| Small diesel car engines (e.g., 4-cylinder) | 280-350 psi |

| Medium-duty diesel engines (e.g., 6-cylinder) | 350-400 psi |

| Heavy-duty diesel engines (e.g., V8 or larger) | 400-450 psi |

It's important to note that these are just general guidelines and the actual compression pressure readings for a diesel engine may vary within a certain range. If you're concerned about the compression pressure of your diesel engine, it's best to have it tested by a qualified mechanic or technician who can accurately assess the engine's condition and provide any necessary repairs or adjustments.