Got a diesel newbie question...

[great white]

What's a "pre-cup"?

Is it the pre-combustion chamber in an IDI diesel?

I hear the terms "diamond cut precup" occasionally on the forum and am not sure what it is.....

 

[bison]

yep.

there's diff cups for diff yrs and HP,i believe diamonds are the latest

 

[ak diesel driver]

it's not diamond cut it's an identifing mark

 

[great white]

it's not diamond cut it's an identifing mark

Ah, now that makes more sense....