|
PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,575
|
Likely. Knurling the valve guides to tighten them up was common in the days of cast iron heads without replaceable guides. In old school engines, it worked well enough. When the head was rebuilt, the guides could be knurled if they weren't worn out, or bored oversize and oversize valves installed, or bored out and new guides pressed in.
__________________
1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
|