Well, good grief again. The machine shop refused to charge me for re-seating the valve seat.
This causes consternation, frankly.
I did not Dykum Blue, but rather, Sharpie Blacked the valve seat and rotated the valve to see if the seating surface had gone off or out of concentric. Passed:
As I was sticking valves back in the head, I saw this:
That is a cracked exhaust guide boss on #1. The machine shop who did not put the seat in all the way, must have hammered the guide home without heating the head or chilling the guide, because that thar is what happens when there is too much interference.
After cleaning the outer perimeter of the seats and smoothing the combustion chamber to ports radii, I sanded down the perimeter wall as best I could, and rounded the corners of the boss, and smoothed the radius to the head surface to, I don't know, help it?
Did a final oil wipe of the 1 & 2 cylinders:
.. .. .. and stuck that head on with a prayer:
Another two-hour fiddlef**k with the horrifically formed Air-Cooled.Net right side sled tin to make it drop into place with screw holes lined up:
Then I shut off the lights and took my work truck home:
2019 Annual Funding Drive!
BobD - 1978 Bus . . . . . . . . . . .111,155 miles
Chloe - 1970 bus . . . . . . . . . . . 206,820 miles
Naranja - 1977 Westfalia . . . . . 97,179 miles
Pluck - 1973 Squareback . . . . . 55,510 miles
Alexus - 1991 Lexus LS400 . . . 77,717 miles