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Bill (side topic),=20
How did you know you had a burned piston; i.e. what were the symptoms?=20
TIA,=20
Bob=20
----- Original Message -----
From: "Alan Seigrist" <healey.nut@gmail.com>=20
To: "WILLIAM B LAWRENCE" <ynotink@msn.com>=20
Cc: "healeys" <healeys@autox.team.net>=20
Sent: Friday, October 30, 2015 1:31:21 AM=20
Subject: Re: [Healeys] head gaskets=20
If you are worried about galvanic corrosion, copper gaskets are far worse f=
or aluminum than steel!=20
Yeah, if you can get MLS gaskets for our cars now (I didn't know you could)=
, use it for sure!!!=20
On Fri, Oct 30, 2015 at 11:09 AM, WILLIAM B LAWRENCE < ynotink@msn.com > wr=
ote:=20
Gary,=20
I've had a chronic problem keeping head gaskets in my 2660. A standard gask=
et would last a couple months before it burned in two between #2 and #3 cyl=
inders. I bought a solid copper gasket and it solved the burn through probl=
em, but it was impossible to seal the oil and water passages so I've long h=
ad massive oil leaks and oil contaminating the coolant. I've tried o-ringin=
g the oil and water passages which helped somewhat but didn't last. I recen=
tly experienced a burned piston and so am rebuilding the engine. (I drove i=
t as long as I could before pulling the engine.) The machinist who milled t=
he 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 expla=
ins a lot. It also displayed very poor workmanship by the last machine shop=
having a very heavy and irregular tool pattern that militated against gask=
et sealing.=20
In researching theoretical fixes for head gasket problems I took to the int=
ernet and read up on the new technology which is the MLS gasket. Multi Laye=
r Steel gaskets consist of three layers of steel with their outer faces coa=
ted with a resilient teflon layer that is the actual sealing medium. The th=
ree 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 with=
out stressing or damaging the gasket. The resilient layer seals and fills u=
nevenness 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). Fo=
rtunately that is the standard for most engines these days anyway and is ea=
sily done. I'm in the middle of the rebuild now and I've purchased an MLS g=
asket 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.=20
Bill Lawrence=20
Date: Thu, 29 Oct 2015 10:52:47 -0400=20
From: warthodson@aol.com=20
To: healeys@autox.team.net=20
Subject: [Healeys] head gaskets=20
I thought I could get a good argument started on the subject of head gasket=
s. AH Spares recently announced that they are offering multi-layered all st=
eel head gaskets for Healeys. Suitable for both competition & street engine=
s and aluminum heads to cast iron or aluminum blocks. Presumably, also cast=
iron heads, but the ad did not state that.=20
I know they are not alone in offering improved head gaskets.=20
Being a cynic, I have to wonder if steel gaskets are really better that cop=
per gaskets or are they just cheaper to manufacture?=20
Being an engineer, I have to wonder if a steel gasket is really a good choi=
ce for an aluminum head, especially in the sealing ring area around the cyl=
inders?=20
Gary Hodson=20
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<html><body><div style=3D"font-family: Arial; font-size: 12pt; color: #0000=
00"><div>Bill (side topic),<br></div><div><br></div><div>How did you know y=
ou had a burned piston; i.e. what were the symptoms?<br></div><div><br></di=
v><div>TIA,<br></div><div>Bob<br></div><div><br></div><div><br></div><hr id=
=3D"zwchr"><div style=3D"color:#000;font-weight:normal;font-style:normal;te=
xt-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;">=
<b>From: </b>"Alan Seigrist" <healey.nut@gmail.com><br><b>To: </b>"WI=
LLIAM B LAWRENCE" <ynotink@msn.com><br><b>Cc: </b>"healeys" <heale=
ys@autox.team.net><br><b>Sent: </b>Friday, October 30, 2015 1:31:21 AM<b=
r><b>Subject: </b>Re: [Healeys] head gaskets<br><div><br></div><div dir=3D"=
ltr">If you are worried about galvanic corrosion, copper gaskets are far wo=
rse for aluminum than steel!<div><br></div><div>Yeah, if you can get MLS ga=
skets for our cars now (I didn't know you could), use it for sure!!!</div><=
div><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quot=
e">On Fri, Oct 30, 2015 at 11:09 AM, WILLIAM B LAWRENCE <span dir=3D"ltr">&=
lt;<a href=3D"mailto:ynotink@msn.com"; target=3D"_blank">ynotink@msn.com</a>=
></span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div dir=3D"ltr"><br><div><br></div><div>Gary,</div><div><br></div><di=
v>I've had a chronic problem keeping head gaskets in my 2660. A standard ga=
sket would last a couple months before it burned in two between #2 and #3 c=
ylinders. I bought a solid copper gasket and it solved the burn through pro=
blem, 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-ring=
ing the oil and water passages which helped somewhat but didn't last. I rec=
ently 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 wa=
s low on one corner and he had to take 0.012" off of it to make it flat. Th=
at explains a lot. It also displayed very poor workmanship by the last mach=
ine shop having a very heavy and irregular tool pattern that militated agai=
nst gasket sealing. </div><div><br></div><div>In researching theoretic=
al 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 tef=
lon 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 ex=
pand differentially in relation to one another without stressing or damagin=
g 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 smo=
oth (to a maximum roughness average (RA) of 60). Fortunately that is the st=
andard for most engines these days anyway and is easily done. I'm in the mi=
ddle of the rebuild now and I've purchased an MLS gasket from Denis Welch M=
otorsport. They claim it solves the gasket leakage problems that are so com=
mon on the 4 cylinder and it can be reused twice in most cases. With a smoo=
th 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 di=
sappearing 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><d=
iv><br></div><div>Date: Thu, 29 Oct 2015 10:52:47 -0400<br>From: <a href=3D=
"mailto:warthodson@aol.com"; target=3D"_blank">warthodson@aol.com</a><br>To:=
<a href=3D"mailto:healeys@autox.team.net"; target=3D"_blank">healeys@autox.=
team.net</a><br>Subject: [Healeys] head gaskets<br><div><br></div><span sty=
le=3D"color: black; font-family: arial; font-size: small;" data-mce-style=
=3D"color: black; font-family: arial; font-size: small;" face=3D"arial" col=
or=3D"black" size=3D"2">
<div><span style=3D"background-color: transparent; font-family: Arial,Helve=
tica,sans-serif;" data-mce-style=3D"background-color: transparent; font-fam=
ily: Arial,Helvetica,sans-serif;" face=3D"Arial, Helvetica, sans-serif">I t=
hought 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 engin=
es and aluminum heads to cast iron or aluminum blocks. Presumably, also cas=
t iron heads, but the ad did not state that.</span></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 bette=
r 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 th=
e cylinders?</div>
<div>Gary Hodson</div>
</span><br></div></div></div></blockquote></div></div><div><br></div></div>=
<div><br></div></div></body></html>
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