Here's a breakdown of what contributes to the weight:
* Engine block: Around 150-200 pounds.
* Crankshaft: Around 60-70 pounds.
* Connecting rods and pistons: Around 40-50 pounds.
* Cylinder heads: Around 80-90 pounds per head.
* Valvetrain (camshaft, lifters, pushrods, rockers): Around 20-30 pounds.
* Oil pan: Around 10-15 pounds.
* Other components: Timing chain, water pump, etc.
Note: This is just a general estimate, and the actual weight can be higher or lower depending on the specific engine build. For example, an engine with aftermarket components or a larger displacement could weigh more.