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Ratwell sanoo seuraavasti "The designers came up with additional cooling solutions such as using sodium filled valves. The sodium liquifies at operating temperatures and the liquid is flung from the head to the tip inside the valve stem by the action of the valve to help to cool it. Some of the 1.8L Type 4 VW engines  used sodium valves and you can identify them by the dimple in the center of the head andthe 0.008" valve adjustment specification for this model instead of the normal 0.006" clearance."

 

he designers came up with additional cooling solutions such as using sodium filled valves. The sodium liquifies at operating temperatures and the liquid is flung from the head to the tip inside the valve stem by the action of the valve to help to cool it. Some of the 1.8L Type 4 VW engines used sodium valves and you can identify them by the dimple in the center of the head and the 0.008" valve adjustment specification for this model instead of the normal 0.006" clearance.The designers came up with additional cooling solutions such as using sodium filled valves. The sodium liquifies at operating temperatures and the liquid is flung from the head to the tip inside the valve stem by the action of the valve to help to cool it. Some of the 1.8L Type 4 VW engines used sodium valves and you can identify them by the dimple in the center of the head and the 0.008" valve adjustment specification for this model instead of the normal 0.006" clearance.

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