<div dir="auto">Always excellent advice for all of us, Paul. Thank you.<div dir="auto"><br></div><div dir="auto">Rick</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jan 19, 2021, 4:59 AM PaulHunt73 <<a href="mailto:paulhunt73@virginmedia.com">paulhunt73@virginmedia.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div bgcolor="#ffffff">
<div><font size="2">I had the same problem with the V8 (aluminium heads) using the
one from a 1/2" drive socket set which measured 1.1" OD, but did have one that
fitted at 1.087". When I changed the heads that did not fit either,
but a 3/8" drive socket did at 1.070".</font></div>
<div><font size="2"></font> </div>
<div><font size="2">Be very careful tightening them, after decades of doing
plugs in cast-iron heads I loosened and tightened the same way, and after many
years and tens of thousands of miles stripped a thread. Repaired that but
subsequently stripped another, hence changing the heads and a lot more
circumspect about tightening - reputedly 15-22 ft lb for gasket seal plugs as
opposed to 26 to 30 in cast iron. Another issue is said to be differential
expansion, another recommendation is to only remove them fully cold or fully
hot, not part warm. Another consideration is applying anti-seize to
the threads - some recommend it, but only if the plug body is black or plain
steel. If applied to pre-coated or nickel-alloy bodied plugs the torque
should be reduced by 30%-40%.</font></div>
<div><font size="2"></font> </div>
<div><font size="2">PaulH.</font></div>
<div><font size="2"></font> </div>
<div><font size="2"></font> </div>
<blockquote style="BORDER-LEFT:#000000 2px solid;PADDING-LEFT:5px;PADDING-RIGHT:0px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px">
<div style="FONT:10pt arial">----- Original Message ----- </div>
<div><font size="2"></font><font size="2"></font><br></div>I tried to install new
plugs in my 1969 MGB GT today. I was not successful. I don't know what
genius designed the aluminum head, but a normal spark plug socket for a 14mm
spark plug does not go all the way dow to fully engage the
head.</blockquote></div>
_______________________________________________<br>
<br>
<a href="mailto:Mgs@autox.team.net" target="_blank" rel="noreferrer">Mgs@autox.team.net</a><br>
Donate: <a href="http://www.team.net/donate.html" rel="noreferrer noreferrer" target="_blank">http://www.team.net/donate.html</a><br>
Suggested annual donation $12.75<br>
<br>
Archive: <a href="http://www.team.net/pipermail/mgs" rel="noreferrer noreferrer" target="_blank">http://www.team.net/pipermail/mgs</a> <a href="http://autox.team.net/archive" rel="noreferrer noreferrer" target="_blank">http://autox.team.net/archive</a><br>
<br>
Unsubscribe: <a href="http://autox.team.net/mailman/options/mgs/richardolindsay@gmail.com" rel="noreferrer noreferrer" target="_blank">http://autox.team.net/mailman/options/mgs/richardolindsay@gmail.com</a><br>
</blockquote></div>