<p>An engine cooling apparatus includes a block water jacket (3) formed in a cylinder block (2). The block water jacket (3) includes a coolant inlet (5) through which coolant is introduced into the block water jacket (3). In a cylinder head, a head water jacket (7) is formed. A water jacket spacer is fitted into the block water jacket (3). A flow-directing plate (9) is formed integrally with the block water spacer. Immediately after the flow-directing plate (9) directs the coolant toward the head water jacket (7), the coolant flows into the head water jacket (7). Then, the coolant is circulated in the head water jacket (7) until warming-up is completed. After the warming-up is completed, the coolant flows into the block water jacket (3) from the head water jacket (7) to cool the cylinder block (2).
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