healeyguy@aol.com wrote:
> Mike
> I used six cylinder exhaust valves in my 100. Can't recall at present,
> rebuilt it over 10 years ago, but I think I recall they were for an
> early (intergrated intake) head and were slightly larger diameter.
> Aloha
> Perry
>
> -----Original Message-----
> From: Mike MacLean <macleans@earthlink.net>
> To: healeys@autox.team.net
> Sent: Wed, 04 May 2005 13:42:36 -0700
> Subject: Oversize Valve Seats
>
> Does someone know where I can get slightly oversize exhaust valves for
> my BN2? The head I am using came off a 100M car. Somewhere in the
> past, someone put some oversize exhaust seats in it for whatever
> reason. A stock exhaust valve from Moss (correct head size BTW) only
> just engages the seat with the outside edge of the valve. Not a good
> situation. The intakes are O.K. Any place to buy slightly oversize
> valves? Anyone else seen this before?
> Mike MacLean
> 56 BN2
> 60 AN5
>
Maybe some one on the list has the measurements of the head of a six
cylinder valve. The measurement of the standard 100-4 valve head is
1.415" - 1.420", or about 36mm. I rough measured the exhaust valves I
got from Moss and they were about 36mm in diameter. This is correct
according to the 100-4 service manual. The machinist today pointed out
that the valve seats were very close together and he would not replace
them for this fact. In effect, he said what I have is what I will be
using. A few people on the list pointed out exotic possibilities like
Porsche valves. I suspect somewhere in the past someone used a Chevy
valve as was suggested to me by Ed Kahler. It makes sense due to the
fact that Chevy valves were more easily obtainable anywhere in the
country. More research in order. I've got a lot of possibilities to
check out now. I love this list.
Mike MacLean
56 BN2
60 AN5
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