Spent the day working on heads - valve seats and valve guides.
My valve guides were at .3885" or so, depending on the guide (they were enlarged .015" when rebuilt before I got the motor and valves with .015" oversize stems were installed). On some of the valves, the guide to valve stem clearance was as tight as .0005", and several exhaust valves were galled. I could have polished the galling out of the stems, but I ordered new exhaust valves instead. Tough to find with the oversize stems, but I found some.
In a perfect world, I'd get to .3895" or so on the intake (.0025" clearance) and about .3900" on the exhaust (.0030" clearance). I was able to source a K-Line 3.900" piloted reamer but they don't make one in .3890" or .3895".
So, I got the exhaust valve guides on one head to .3900" today using the reamer and some cutting fluid. Easy-peasy, since it only needed to enlarge the guide by .0015". That'll give me .003" clearance on the exhaust. Afterwards, I used the Brush Research flex hone - one stroke down and up using some honing oil - to get rid of any burrs and to leave a crosshatch pattern in the guide for oil retention.
I also hit each of the intake valve guides with two strokes with the flex hone and was thinking that would be good, since none of the intake valves were galled. However, in reviewing my data, I'm seeing that the clearance on three of the intake valve guides was .0005". That's too damn tight in my opinion -- from the factory, they're set up at about .0021" and the max allowable is .0055". I'm inclined to open up the intakes to .3900" with the piloted reamer as well, giving me .003" clearance on the intake, same as the exhaust. Only other option would be to polish the intake valve stems a bit and hit the guides with a few more passes of the hone.
From there, I put my new set of Neway cutters to work. Took a bit of getting used to, but when I was done, I had a three angle on all the seats, all the Prussian blue was gone, and the seat width was within spec - .065" - .095".
I still need to lap the valves, but my new exhaust valves haven't arrived yet, and my intake valves need to either be replaced or ground and I don't have a valve grinder. I'll either ask the machine shop to take care of these or order a new set unless I find a good deal on a valve grinder locally.
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