OM617A Sodium filled valves as Intake valves
OM617A Sodium filled valves as Intake valves
The question/hypothesis i have is, could you use the sodium filled exhaust valves in place of the solid stem intake ones, so then you would be running 10/10 cooler & lighter valves?
The exhaust valves are 23ish dollars each and only about $3 more expensive than the intake valves. I think they are the exact same size with 10mm shaft, but I have no proof on length /head shape yet, i havent been able to compare them.
Does anyone have any thoughts on this or a pair of spare valves to compare for me?
Much appreciated, thank you.
So the turbo model of the Om617, the om617a, comes with sodium filled exhaust valves in the head. The whole purpose as I understand it is that the sodium absorbs the heat and keeps the exhaust valves from burning up. An added bonus is that they are about 15% lighter than their solid stem intake amigos, which lightens up the valve train.
The question/hypothesis i have is, could you use the sodium filled exhaust valves in place of the solid stem intake ones, so then you would be running 10/10 cooler & lighter valves?
The exhaust valves are 23ish dollars each and only about $3 more expensive than the intake valves. I think they are the exact same size with 10mm shaft, but I have no proof on length /head shape yet, i havent been able to compare them.
Does anyone have any thoughts on this or a pair of spare valves to compare for me?
Much appreciated, thank you.
bullonezero
08-30-2018, 01:14 AM #2The exhaust valves are of a smaller diameter than the intake
1978 300D, 373,000km... OM617.912 with a Holset HX30W, 7.5mm IP, 711.113 5 speed (project car, 7 years off the road and counting ;/)
1977 250 270,000km (parts car)
1977 300D (ex 280) 500,000km
1981 240D 498,000
1975 HJ45 ???,000
2001 2.8TD Rodeo 4x2 - 456,000 - DD
There's lot of better mods before you worry about intake valves IMO
1978 300D, 373,000km... OM617.912 with a Holset HX30W, 7.5mm IP, 711.113 5 speed (project car, 7 years off the road and counting ;/)
1977 250 270,000km (parts car)
1977 300D (ex 280) 500,000km
1981 240D 498,000
1975 HJ45 ???,000
2001 2.8TD Rodeo 4x2 - 456,000 - DD
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Ex: 525tds 130kW, C250TD 160kW, E320CDI 200kW, ML400CDI 230kW, A6 R5TDI 130kW
Now: Q7 V8TDI 240kW, 320d 150kW, 335d 210kW
Sodium cooling efect will not take place at intake temps.
-------------------------------------------------------------------------------------------------------------------------
Ex: 525tds 130kW, C250TD 160kW, E320CDI 200kW, ML400CDI 230kW, A6 R5TDI 130kW
Now: Q7 V8TDI 240kW, 320d 150kW, 335d 210kW
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