1G Cylinder head geometry (valves & springs)

[bryanzomg]

I’ve got my head in the machine shop, what specifications should I give them for my installed valve height & valve spring install height?

 

[1990TSIAWDTALON]

The spring manufacturer has those exact specs to give them.
This is an older thread but the poster is/was a very good machinist so I trust what he posted.

https://www.dsmtuners.com/threads/4g63t-valve-spring-info.341209/

 

[bryanzomg]

The spring manufacturer has those exact specs to give them.
This is an older thread but the poster is/was a very good machinist so I trust what he posted.

https://www.dsmtuners.com/threads/4g63t-valve-spring-info.341209/

Thank you I just checked kigglys website and they show what the pressure should be at install height specifications I was not too sure that was the install height I thought it was universal thing for 4g63s

 

[1990TSIAWDTALON]

You can shim valve springs to get the install height and pressure correct but spring manufacturers always have their specs particular to their product. Usually pretty close on height but pressure will vary depending on wire size and number of coils.