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OK, who knows what "sodium cooled" means in reference to our intake valves?

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Old 05-31-2002, 05:51 AM
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Default OK, who knows what "sodium cooled" means in reference to our intake valves?
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Old 05-31-2002, 05:52 AM
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Default sodium is in the metal compound that the valve is composed of. It has a higher heat tolerance and
tends to run cooler.Sodium filled valves aid heat
transfer from the head of the exhaust valve up the stem.
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Old 05-31-2002, 05:54 AM
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I thought they are filled with sodium
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Old 05-31-2002, 05:54 AM
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extra salt in the mix
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Old 05-31-2002, 05:56 AM
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Default sure if you ever get in a bind and the drive through is 4 miles back
you can always bust open a valve to salt your fries.
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Old 05-31-2002, 05:58 AM
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Default well, I heard quite a few years back about valves
(on exhaust side though) filled inside with metallic sodium. When heated, sodium would become liquid and help disperse heat. I wonder if Audi did the same for intake valves...
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Old 05-31-2002, 05:59 AM
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I think you are right
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Old 05-31-2002, 06:00 AM
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you are right I updated my post.
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Old 05-31-2002, 06:02 AM
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Default but the funny thing is, it says INLET valves are sodium cooled
I thought it was only done for exhaust valves...
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Old 05-31-2002, 06:03 AM
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Default Sodium is used as a coolant in exhaust valves
The exhaust valves are hollow, and filled with sodium.

Sodium is solid at room temp, but liquid at operating temps.
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