[Healeys] Hardened seats in a cast iron 100 head

[Bob Spidell]

My dad had our BN2/100M's head redone--valves, guides, etc.--by a local 
speed shop we trust (the machinist is a meticulous Kiwi who Dad said got 
really excited when he saw 'Weslake' cast in the head). Unfortunately, 
Dad isn't around to ask, but they almost certainly installed hardened 
exhaust valve seats; it's been SOP since, well, since lead was removed 
from gas. No issues, and I had it out on the road a couple weeks ago.


On 8/25/2024 7:44 AM, Michael Salter wrote:
> I am still using cast iron heads on both my 100's. Amazingly neither 
> have serious cracks as are so common on these.
> I am really picky and don't particularly like the different sound that 
> a 100 engine with an aluminium head makes so would like to continue 
> using these cast iron ones.
> I'm contemplating installing hardened seats in one.
> Hase anyone done this successfully?
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