Turbo vs NA Cylinder Heads

[R.O.R-2.0]

Toby, grab an old TD exhaust (im sure you have 500 laying around) valve, and cut a notch in the valve stem. then throw it in a bucket of water.. tell us if it goes nuts once it touches the water..

i would totally cut a worn out TD valve, but i only have 4 exhaust valves, and they happen to be installed in a TD head right now..

[billybobf]

you know that in moist air that a sodium filled valve van do some serious damage right?

[Toby]

I have a set of TD exhaust valves on the bench and they look identical to the regular diesel stuff. So what would make me think they are sodium filled?

[bajacalal]

Toby, grab an old TD exhaust (im sure you have 500 laying around) valve, and cut a notch in the valve stem. then throw it in a bucket of water.. tell us if it goes nuts once it touches the water..

i would totally cut a worn out TD valve, but i only have 4 exhaust valves, and they happen to be installed in a TD head right now..

I thought the sodium was only in the center of the stem.

[R.O.R-2.0]

I have a set of TD exhaust valves on the bench and they look identical to the regular diesel stuff. So what would make me think they are sodium filled?

Toby, grab an old TD exhaust (im sure you have 500 laying around) valve, and cut a notch in the valve stem. then throw it in a bucket of water.. tell us if it goes nuts once it touches the water..

i would totally cut a worn out TD valve, but i only have 4 exhaust valves, and they happen to be installed in a TD head right now..

I thought the sodium was only in the center of the stem.

you guys know that water and sodium react right? sodium BURNS when you introduce water..

thats why i said to notch the stem of a valve.. that will expose the sodium, and allow the water to touch it, and react.

i wish someone would do it, and take a youtube video of it..

and i swear ive read somewhere in a bentley that it says to NOT GRIND THE VALVES on a TD, because of the valves being sodium filled?

[bajacalal]

you guys know that water and sodium react right? sodium BURNS when you introduce water..

thats why i said to notch the stem of a valve.. that will expose the sodium, and allow the water to touch it, and react.

i wish someone would do it, and take a youtube video of it..

and i swear ive read somewhere in a bentley that it says to NOT GRIND THE VALVES on a TD, because of the valves being sodium filled?

I know it does. I want to try this. But I think you would have to do more than "notch" the valve. I think you would have to saw the stem in half to get at the atomic sodium. I thought it was pretty well sealed in there. As far as grinding them, I don't know... maybe because they are hollow they are weaker? I don't think the sodium is that close to the surface though.

[R.O.R-2.0]

when i say to notch a valve, i mean to take a grinder, and cut a notch half way thru the valve stem.. or cut the valve stem in HALF. that will surely expose the sodium.

[Trips_B]

I will take a look when I get home, I may have an extra valve but im pretty sure they were all tossed when I got rid of my extra head

[bajacalal]

Other (usually turbo) engines had sodium filled valves, usually exhaust valves.

If you want to do a science experiment just make sure to wear eye protection and to put it on youtube.

[Dakotakid]

This is why the replacement TRW valves for the hydros are so damned expensive.
Oem TD solid exhausts were sodium from the factory.
Every Bentley I have ever had has this warning in it.
Less argumentation. More reading.

[Trips_B]

sorry guys, I just went through and cleaned the garage and alas I have no extra exhaust valves to try this