turbo wastegate seat erosion help

-
pishta

pishta

I know I'm right....
Joined
Oct 13, 2004
Messages
23,821
Reaction score
13,677
Location
Tustin, CA
My CT26 turbo integral wastegate seat is burned so its leaking boost. Just looks like its eroded or burned. Do you think a 31mm copper exhaust seat cut for and pressed in would survive? Its where the flapper sits inside the hot side.
s-l225.jpg
 
Last edited:
Melting point of copper is 1981° F. Yeah it should work for you.
 
How much force is the valve applying, and how rapidly? Is that truly a copper valve seat, or a hardened alloy of/with copper? if it's very soft, it would hammer out quickly. If it's actually made for exhaust valves, it should be awesome.

I only ask because I've not seen 'copper' valve seats.
 
jos51700 said:
How much force is the valve applying, and how rapidly? Is that truly a copper valve seat, or a hardened alloy of/with copper? if it's very soft, it would hammer out quickly. If it's actually made for exhaust valves, it should be awesome.

I only ask because I've not seen 'copper' valve seats.
Click to expand...

Looks like bronze to me.
 
It's only a waste gate flapper valve that opens slightly when the turbo boost gets too high to vent exhaust around the turbine. It doesn't get hammered, just closes with spring pressure when there is low or no boost. It will see extended exhaust gas velocity when WOT and won't have a traditional valve to absorb any of its heat. How hard would it be to cut the valve seat pocket with no arbor (valve) hole to guide cutter? Mill work?
 
Last edited:
I think there are better materials than that.

There are beryllium-copper valve seats that can take the heat but "they" say the dust that comes off it while machining is carcinogenic.

I switched to nickel-bronze and it worked as well and machined easier.
 
You must log in or register to reply here.
-

Back
Top