Do I need to adjust valves after having my head resurfaced? (1 Viewer)

Feb 22, 2017
SW Washington, USA
Thought I’d mention this.
With my head still in the shop and cleaning up the block, I recently chased the threads in the block with “THIS TAP”. The tap spun in easily quite a way with little to no resistance. Then for another 3 or maybe 4 turns, I had drag that felt like I was cleaning out existing threads that were there but had not been used. They felt crusty & corroded up. So, I’m thinking that on my F.5 anyway, that I have some wiggle room if my head gets a little machining. I’ll have to do some measuring when I get the head back to be sure.
This tap should work for my 5/73 1F, right?

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