<div dir="ltr"><div dir="ltr">Hi Bob -<div><br></div><div>I learned a little something this time, what was on there was a ford style valve seal (see <a href="https://www.summitracing.com/parts/edl-9725">https://www.summitracing.com/parts/edl-9725</a>). I was confused because the parts book shows something called a "valve shroud" (item 49 here <a href="https://mossmotors.com/austin-healey-100-100-6-3000/engine-performance/cylinder-head/cylinder-head-100-4">https://mossmotors.com/austin-healey-100-100-6-3000/engine-performance/cylinder-head/cylinder-head-100-4</a>) but I now understand this is something completely different than what I took off my car. This original "shroud" is NLA.</div><div><br></div><div>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. </div><div><br></div><div>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?</div><div><br></div><div>Best,</div><div><br></div><div>Alan</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 23, 2021 at 12:09 AM Bob Spidell <<a href="mailto:bspidell@comcast.net">bspidell@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
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).<br>
<br>
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).<br>
<br>
So, Alan, what did you decide?<br></div>
</blockquote></div></div>