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Gary=2C
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=2C 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 mille=
d 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 ex=
plains a lot. It also displayed very poor workmanship by the last machine s=
hop having a very heavy and irregular tool pattern that militated against g=
asket 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=2C a modern high tech gasket a=
nd a good rebuilt cylinder head (Needs a crack repair of course.) I'm hopin=
g to see a lot of miles disappearing in my rear view mirrors again soon. An=
d maybe even gain a little control my oil consumption.
Bill Lawrence
Date: Thu=2C 29 Oct 2015 10:52:47 -0400
From: warthodson@aol.com
To: healeys@autox.team.net
Subject: [Healeys] head gaskets
=0A=
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=2C also ca=
st iron heads=2C but the ad did not state that.=0A=
=0A=
I know they are not alone in offering improved head gaskets.=0A=
=0A=
Being a cynic=2C I have to wonder if steel gaskets are really better that c=
opper gaskets or are they just cheaper to manufacture? =0A=
=0A=
Being an engineer=2C I have to wonder if a steel gasket is really a good ch=
oice for an aluminum head=2C especially in the sealing ring area around the=
cylinders?=0A=
=0A=
Gary Hodson=0A=
_______________________________________________=0A=
Archive: http://www.team.net/archive=0A=
=0A=
Healeys@autox.team.net=0A=
http://autox.team.net/mailman/listinfo/healeys=0A=
=0A=
sn.com =
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<body class=3D'hmmessage'><div dir=3D'ltr'><br><br><div>Gary=2C</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=2C but it was impossible to seal the oil and water passage=
s so I've long had massive oil leaks and oil contaminating the coolant. I'v=
e 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 en=
gine. (I drove it  =3Bas long as I could before pulling the engine.) Th=
e machinist who milled the top of the block said that it resembled a ski ju=
mp. 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 tha=
t militated against gasket sealing. =3B</div><div><br></div><div>In res=
earching 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 Stee=
l gaskets consist of three layers of steel with their outer faces coated wi=
th a resilient teflon layer that is the actual sealing medium. The three la=
yers of steel can slide over each other to a certain extent allowing the he=
ad and block to expand differentially in relation to one another without st=
ressing or damaging the gasket. The resilient layer seals and fills unevenn=
ess 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). Fortunat=
ely that is the standard for most engines these days anyway and is easily d=
one. 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 proble=
ms that are so common on the 4 cylinder and it can be reused twice in most =
cases. With a smooth flat engine block=2C a modern high tech gasket and a g=
ood rebuilt cylinder head (Needs a crack repair of course.) I'm hoping to s=
ee a lot of miles disappearing in my rear view mirrors again soon. And mayb=
e even gain a little control my oil consumption.</div><div><br></div><div>B=
ill Lawrence</div><div><br></div><div>Date: Thu=2C 29 Oct 2015 10:52:47 -04=
00<br>From: warthodson@aol.com<br>To: healeys@autox.team.net<br>Subject: [H=
ealeys] head gaskets<br><br><font color=3D"black" size=3D"2" face=3D"arial"=
>=0A=
<div><font face=3D"Arial=2C Helvetica=2C sans-serif" style=3D"background-co=
lor:transparent=3B">I thought I could get a good argument started on the su=
bject of head gaskets. AH Spares recently announced that they are offering =
multi-layered all steel head gaskets for Healeys. Suitable for both competi=
tion &=3B street engines and aluminum heads to cast iron or aluminum blo=
cks. Presumably=2C also cast iron heads=2C but the ad did not state that.</=
font></div>=0A=
=0A=
<div>I know they are not alone in offering improved head gaskets.</div>=0A=
=0A=
<div>Being a cynic=2C I have to wonder if =3Bsteel gaskets are really b=
etter that copper gaskets or are they just cheaper to manufacture? =3B<=
/div>=0A=
=0A=
<div>Being an engineer=2C I have to wonder if a steel gasket is really a go=
od choice for an aluminum head=2C especially in the sealing ring area aroun=
d the cylinders?</div>=0A=
=0A=
<div>Gary Hodson</div>=0A=
</font><br>_______________________________________________=0A=
Archive: http://www.team.net/archive=0A=
=0A=
Healeys@autox.team.net=0A=
http://autox.team.net/mailman/listinfo/healeys=0A=
=0A=
sn.com</div> </div></body>
</html>=
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_______________________________________________
Archive: http://www.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
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