<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I have 86mn pistons, do I need a 91mm to outskirt the liners? Is Comtic the best head gasket for aluminum heads?</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Straightedge show no sign of warpage, and no visible damage any where now that it is cleaned. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Tom, how hot and how long in the oven? Can I just sneak it in under Momma's biskets?</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Many thanks to all,</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Bill</div><div id="AppleMailSignature"><br><br>Sent from my <span style="background-color: rgba(255, 255, 255, 0);">Altair 8800</span></div><div><br>On Apr 4, 2017, at 10:34 AM, Tony Drews <<a href="mailto:tony@tonydrews.com">tony@tonydrews.com</a>> wrote:<br><br></div><div>
Definitely has the symptoms of blown head gasket. I've had much
better luck with compressible gaskets than solid ones. Solid ones
need liner protrusion to be PERFECT.<br><br>
The Aluminum heads have the intake valves unshrouded like you'd get if
you milled a stock head. My latest head gaskets have been Cometic
ones. On line their store lists 88 mm gaskets but if you call you
can get a 91 mm gasket. This is almost large enough diameter to
keep the fire ring completely out of the combustion chamber. Steve
Yott was having some 92 mm ones made of a similar design.<br><br>
I can't comment much on the head itself - I know one of my racing
competitors ran an aluminum head for a few years and had constant head
gasket problems so went back to iron at some point.<br><br>
Regards, Tony<br><br>
At 06:53 PM 4/3/2017, Bill Beecher wrote:<br>
<blockquote type="cite" class="cite" cite="">Content-Type:
multipart/alternative;<br>
<x-tab> </x-tab>
boundary="----=_NextPart_000_001C_01D2ACAB.9B3A25B0"<br>
Content-Language: en-us<br><br>
<font face="Calibri" size="2">Happy Monday List,<br>
<br>
Have had a problem with some water up in the rocker area of the TR3(TR4A
Motor) ever since I bought it last year. Just now getting to a
point where I can pull the head and see if I can see what the issue
is. Below are my observations:<br>
1. Did not know it was an aluminum head until today, re-torqued it last
year when I first saw this problem at 95lbs. Learned today it
should be 70lbs.<br>
2. Runs great, compression checks out good at 150-55 across all.
But after getting up to highway speeds then coming back to town it
quickly overheats and blows the water past the rad cap.<br>
3. Cannot see any damage to the solid copper head gasket. Is this
the right type gasket for an aluminum head?<br>
4. Cannot see any damage to the head, how do you check an aluminum
head? I would think that magnaflux would not work here.<br>
5. Drained and checked the oil last fall, no water present in the
case.<br>
<br>
Any suggestions from the collective wisdom would be greatly appreciated,
seems this motor was intended for some level of performance as it also
has Moss�s roller rockers. <br>
<br>
Many thinks to all,<br>
<br>
Bill B<br>
TS30800L<br>
<br>
<br>
<br>
<br>
</font><br>
** <a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a> **<br><br>
Donate:
<a href="http://www.team.net/donate.html" eudora="autourl">
http://www.team.net/donate.html</a><br>
Archive:
<a href="http://www.team.net/archive" eudora="autourl">
http://www.team.net/archive</a><br>
Forums:
<a href="http://www.team.net/forums" eudora="autourl">
http://www.team.net/forums</a><br>
Unsubscribe/Manage:
<a href="http://autox.team.net/mailman/options/triumphs/tony@tonydrews.com" eudora="autourl">
http://autox.team.net/mailman/options/triumphs/tony@tonydrews.com</a>
</blockquote>
<br>
</div></body></html>