blakemcelroy2000
Member
- Joined
- Oct 18, 2017
- Location
- Portland OR
Hey all. Ive been reading up on here about the truly horrible design of the exhaust port ceiling on B18/B20 heads. I saws some guides on removing the "hump" around where the exhaust valve guide comes through the ceiling. None of the posts however mentioned anything about what should be done with the valve guide. Should it be removed, the ceiling ground, then a stock length guide reinstalled? Or should a shorter valve guide (like an intake valve guide) be installed in its place to limit its protrusion into the flow? Or can the guide simply be left in the head, and ground down smooth with the rest of the ceiling, and then the ground side of the guide de-burred? Any disadvantage to running shorter guides? Thanks.