[Healeys] 100/4 / A90 old style valve seals
healey.nut at gmail.com
Mon Feb 22 18:32:52 MST 2021
Hi Bob -
I learned a little something this time, what was on there was a ford style
valve seal (see https://www.summitracing.com/parts/edl-9725). I was
confused because the parts book shows something called a "valve shroud"
(item 49 here
but I now understand this is something completely different than what I
took off my car. This original "shroud" is NLA.
Ultimately the A90 is low compression/low power/single valve spring so I'm
not really too concerned to get it all perfectly set up. I just replaced
the little o ring seal and put the valve back together - good enough for
government work - I don't mind a little blue smoke when I start it... makes
me feel like I'm firing up the wright cyclone as I'm heading out in my SBD
looking for the Akagi.
The main thing is the valve has been lapped and seated properly. Head is
easy enough to pull so if I have to do it again, it's not a big deal. If
I'm motivated I might put the ford type seals on the car... meh?
On Tue, Feb 23, 2021 at 12:09 AM Bob Spidell <bspidell at comcast.net> wrote:
> That thought crossed my mind. I use silicone grease to lube oil filter
> gaskets, and putting silicone dielectric grease in our ancient electrical
> connectors--my dad's Model As used the same type--seems to help prevent
> some of the Lucas gremlins. I use a silicone 'oil' where light lubrication
> is needed and dirt and dust can build up (speedo cables and Bendix gears on
> starters come to mind).
> I'm taking the '50 to 75' years 'spec' with a grain of sodium chloride;
> cars of that era were designed and built to last for only a few years
> before being traded-in or scrapped, but my BJ8 has over 205K miles and is
> going strong (but shows her age).
> So, Alan, what did you decide?
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