Valve, Intake/Exhaust

If valve guides are damaged, or are larger than specifications allow, install repair insert as follows:

1. Drill out valve guide, then ream the drilled bore to correct size for insert sleeve.
2. Chill insert in dry ice, then carefully press insert in place.
3. Finish insert with reamer to specified valve guide diameter. Reface valve seat after valve guide has been reamed, then, using a suitable scraping tool, break the sharp corner at top of valve guide.