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<div>If you are going to use a steel or MLS gasket you are going to have to resurface the block and head. They need a finer finish than copper.</div>
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<div>Bill Lawrence</div>
<div>BN1 #554</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Healeys <healeys-bounces@autox.team.net> on behalf of Alan Seigrist <healey.nut@gmail.com><br>
<b>Sent:</b> Tuesday, January 26, 2021 2:54 AM<br>
<b>To:</b> Michael Oritt <michael.oritt@gmail.com><br>
<b>Cc:</b> Healey list <Healeys@autox.team.net><br>
<b>Subject:</b> Re: [Healeys] 100-4 engine head gasket?</font>
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<div dir="ltr">Hi Michael -
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<div>Sounds to me the smart thing to do is put in a steel head gasket because the head was rebuilt not that many miles ago, so I might have a low spot there. The head is torqued correctly so that's not it.</div>
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<div>Best,</div>
<div><br>
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<div>Alan<br>
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<div dir="ltr" class="x_gmail_attr">On Mon, Jan 25, 2021 at 10:27 PM Michael Oritt <<a href="mailto:michael.oritt@gmail.com">michael.oritt@gmail.com</a>> wrote:<br>
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<div class="x_gmail_default" style="color:rgb(51,51,255)">Probably blown gasket at the 3-4 bridge. My original head suffered from erosion of the metal at the 1-2 bridge, allowing the gasket to blow. I had it built up enough to work for a while but eventually
replaced the head with a DWR AL model. </div>
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<div class="x_gmail_default" style="color:rgb(51,51,255)">Best--Michael Oritt</div>
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<div dir="ltr" class="x_gmail_attr">On Mon, Jan 25, 2021 at 4:55 AM Alan Seigrist <<a href="mailto:healey.nut@gmail.com" target="_blank">healey.nut@gmail.com</a>> wrote:<br>
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<div dir="ltr">All -
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<div>My A90 just started running weird. So I took a compression tester and I'm getting (note the A90 is lower compression than the 100):<br>
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1 - 135 psi<br>
2 - 135 psi</div>
<div>3 - 60 psi</div>
<div>4 - 60 psi</div>
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<div>When I put the compression tester on number 3, I get blow back through #4 spark plug port. Then when I put it on #4 I get blow back through the #3 spark plug port.<br>
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Seems to me it's just a blown head gasket.... am I correct? as far as I'm aware, these heads usually crack between 2 & 3, correct?</div>
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<div>TIA<br>
<br>
Alan</div>
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