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<font size="2"><font face="Courier 10 Pitch">Listers,<br>
<br>
The tri-carb intake parts are:<br>
</font></font>
<ul>
<li><font size="2"><font face="Courier 10 Pitch">intake manifold</font></font></li>
<li><font size="2"><font face="Courier 10 Pitch">gasket</font></font></li>
<li><font size="2"><font face="Courier 10 Pitch">heat shield</font></font></li>
<li><font size="2"><font face="Courier 10 Pitch">gasket</font></font></li>
<li><font size="2"><font face="Courier 10 Pitch">1/4" insulator</font></font></li>
<li><font size="2"><font face="Courier 10 Pitch">gasket</font></font></li>
<li><font size="2"><font face="Courier 10 Pitch">HS4 carb</font></font></li>
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<p>The gaskets are all the same, shaped like the carb base with two
holes for the carb mounting studs. I have a reoccurring issue of
the gaskets tearing and blocking the air stream. A couple weeks
ago we found the two gaskets on either side of the heat shield
were bad on the front carb. <br>
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<img src="cid:part1.k0LL8R0L.EQLkgjQe@earthlink.net"
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<p>Today it looks like the gasket between the intake manifold and
the heat shield is bad on the center carb. The first time was a
couple of years ago.</p>
<p>The only non-standard parts I have fitted are the 1/4" insulating
spacer and the nuts that hold everything together. I got sticker
shock for the spacers - $40+/each. So I made my own using a 1/4"
thick linen phenolic laminate sheet, a router and a MGB HS4 spacer
for the pattern. Instead of nuts and lock washers, used AN half
height lock nuts. Had also fitted a PCV valve to the first intake
manifold, but have recently removed it.</p>
<p>Any thoughts as to why the gaskets are being destroyed? <br>
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Cheers,
Bob Haskell
Austin Healey 3000 BN7/BT7 registrar</pre>
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