[Healeys] Hardened seats in a cast iron 100 head

[Kees Oudesluijs]

In most cases hardened valve seats were/are not necessary. There was 
only a small handful of engines that gave trouble after introducing lead 
free petrol.

Op 26-8-2024 om 16:43 schreef Bob Spidell via Healeys:
> 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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