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Bill,
FYI, I have a good head coming up in the rotation very soon. Pretty
sure the customer will be willing to part with it..
Dave
On 10/29/2015 9:09 PM, WILLIAM B LAWRENCE wrote:
>
>
> Gary,
>
> I've had a chronic problem keeping head gaskets in my 2660. A standard
> gasket would last a couple months before it burned in two between #2
> and #3 cylinders. I bought a solid copper gasket and it solved the
> burn through problem, but it was impossible to seal the oil and water
> passages so I've long had massive oil leaks and oil contaminating the
> coolant. I've tried o-ringing the oil and water passages which helped
> somewhat but didn't last. I recently experienced a burned piston and
> so am rebuilding the engine. (I drove it as long as I could before
> pulling the engine.) The machinist who milled the top of the block
> said that it resembled a ski jump. The block was low on one corner and
> he had to take 0.012" off of it to make it flat. That explains a lot.
> It also displayed very poor workmanship by the last machine shop
> having a very heavy and irregular tool pattern that militated against
> gasket sealing.
>
> In researching theoretical fixes for head gasket problems I took to
> the internet and read up on the new technology which is the MLS
> gasket. Multi Layer Steel gaskets consist of three layers of steel
> with their outer faces coated with a resilient teflon layer that is
> the actual sealing medium. The three layers of steel can slide over
> each other to a certain extent allowing the head and block to expand
> differentially in relation to one another without stressing or
> damaging the gasket. The resilient layer seals and fills unevenness in
> the mating surfaces. in order to work the mating surfaces have to be
> machined very smooth (to a maximum roughness average (RA) of 60).
> Fortunately that is the standard for most engines these days anyway
> and is easily done. I'm in the middle of the rebuild now and I've
> purchased an MLS gasket from Denis Welch Motorsport. They claim it
> solves the gasket leakage problems that are so common on the 4
> cylinder and it can be reused twice in most cases. With a smooth flat
> engine block, a modern high tech gasket and a good rebuilt cylinder
> head (Needs a crack repair of course.) I'm hoping to see a lot of
> miles disappearing in my rear view mirrors again soon. And maybe even
> gain a little control my oil consumption.
>
> Bill Lawrence
>
> Date: Thu, 29 Oct 2015 10:52:47 -0400
> From: warthodson@aol.com
> To: healeys@autox.team.net
> Subject: [Healeys] head gaskets
>
> I thought I could get a good argument started on the subject of head
> gaskets. AH Spares recently announced that they are offering
> multi-layered all steel head gaskets for Healeys. Suitable for both
> competition & street engines and aluminum heads to cast iron or
> aluminum blocks. Presumably, also cast iron heads, but the ad did not
> state that.
> I know they are not alone in offering improved head gaskets.
> Being a cynic, I have to wonder if steel gaskets are really better
> that copper gaskets or are they just cheaper to manufacture?
> Being an engineer, I have to wonder if a steel gasket is really a good
> choice for an aluminum head, especially in the sealing ring area
> around the cylinders?
> Gary Hodson
>
> _______________________________________________ Support Team.Net
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--
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM
87107 505-352-1378 Go HERE: my world www.porterbikes.com/
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Bill,<br>
FYI, I have a good head coming up in the rotation very soon. Pretty
sure the customer will be willing to part with it..<br>
Dave<br>
<br>
<div class="moz-cite-prefix">On 10/29/2015 9:09 PM, WILLIAM B
LAWRENCE wrote:<br>
</div>
<blockquote cite="mid:SNT149-W31BB8C8746E4801D478FC8A52F0@phx.gbl"
type="cite">
<style><!--
.hmmessage P
{
margin:0px;
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body.hmmessage
{
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font-family:Calibri
}
--></style>
<div dir="ltr"><br>
<br>
<div>Gary,</div>
<div><br>
</div>
<div>I've had a chronic problem keeping head gaskets in my 2660.
A standard gasket would last a couple months before it burned
in two between #2 and #3 cylinders. I bought a solid copper
gasket and it solved the burn through problem, but it was
impossible to seal the oil and water passages so I've long had
massive oil leaks and oil contaminating the coolant. I've
tried o-ringing the oil and water passages which helped
somewhat but didn't last. I recently experienced a burned
piston and so am rebuilding the engine. (I drove it as long
as I could before pulling the engine.) The machinist who
milled the top of the block said that it resembled a ski jump.
The block was low on one corner and he had to take 0.012" off
of it to make it flat. That explains a lot. It also displayed
very poor workmanship by the last machine shop having a very
heavy and irregular tool pattern that militated against gasket
sealing. </div>
<div><br>
</div>
<div>In researching theoretical fixes for head gasket problems I
took to the internet and read up on the new technology which
is the MLS gasket. Multi Layer Steel gaskets consist of three
layers of steel with their outer faces coated with a resilient
teflon layer that is the actual sealing medium. The three
layers of steel can slide over each other to a certain extent
allowing the head and block to expand differentially in
relation to one another without stressing or damaging the
gasket. The resilient layer seals and fills unevenness in the
mating surfaces. in order to work the mating surfaces have to
be machined very smooth (to a maximum roughness average (RA)
of 60). Fortunately that is the standard for most engines
these days anyway and is easily done. I'm in the middle of the
rebuild now and I've purchased an MLS gasket from Denis Welch
Motorsport. They claim it solves the gasket leakage problems
that are so common on the 4 cylinder and it can be reused
twice in most cases. With a smooth flat engine block, a modern
high tech gasket and a good rebuilt cylinder head (Needs a
crack repair of course.) I'm hoping to see a lot of miles
disappearing in my rear view mirrors again soon. And maybe
even gain a little control my oil consumption.</div>
<div><br>
</div>
<div>Bill Lawrence</div>
<div><br>
</div>
<div>Date: Thu, 29 Oct 2015 10:52:47 -0400<br>
From: <a class="moz-txt-link-abbreviated"
href="mailto:warthodson@aol.com";>warthodson@aol.com</a><br>
To: <a class="moz-txt-link-abbreviated"
href="mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br>
Subject: [Healeys] head gaskets<br>
<br>
<font size="2" color="black" face="arial">
<div><font style="background-color:transparent;"
face="Arial, Helvetica, sans-serif">I thought I could
get a good argument started on the subject of head
gaskets. AH Spares recently announced that they are
offering multi-layered all steel head gaskets for
Healeys. Suitable for both competition & street
engines and aluminum heads to cast iron or aluminum
blocks. Presumably, also cast iron heads, but the ad did
not state that.</font></div>
<div>I know they are not alone in offering improved head
gaskets.</div>
<div>Being a cynic, I have to wonder if steel gaskets are
really better that copper gaskets or are they just cheaper
to manufacture? </div>
<div>Being an engineer, I have to wonder if a steel gasket
is really a good choice for an aluminum head, especially
in the sealing ring area around the cylinders?</div>
<div>Gary Hodson</div>
</font><br>
_______________________________________________
Support Team.Net <a class="moz-txt-link-freetext"
href="http://www.team.net/donate.html";>http://www.team.net/donate.html</a>
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<pre wrap="">_______________________________________________
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/archive";>http://www.team.net/archive</a>
Forums: <a class="moz-txt-link-freetext"
href="http://www.team.net/forums";>http://www.team.net/forums</a>
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href="http://autox.team.net/mailman/listinfo/healeys";>http://autox.team.net/mailman/listinfo/healeys</a>
</pre>
</blockquote>
<br>
<div class="moz-signature">-- <br>
Dave Porter
Porter Custom Bicycles
2909 Arno St. NE
Albuquerque, NM 87107
505-352-1378
Go HERE: my world <a class="moz-txt-link-abbreviated"
href="http://www.porterbikes.com/";>www.porterbikes.com/</a>
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