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[Healeys] 100-4 engine head gasket?

To: Healey list <Healeys@autox.team.net>
Subject: [Healeys] 100-4 engine head gasket?
From: Alan Seigrist <healey.nut@gmail.com>
Date: Mon, 25 Jan 2021 17:55:32 +0800
Delivered-to: mharc@autox.team.net
Delivered-to: Healeys@autox.team.net
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All -

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):

1 - 135 psi
2 - 135 psi
3 - 60 psi
4 - 60 psi

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.

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?

TIA

Alan

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<div dir=3D"ltr">All -<div><br></div><div>My A90 just started running weird=
.=C2=A0 So I took a compression tester and I&#39;m getting (note the A90 is=
 lower compression than the 100):<br><br>1 - 135 psi<br>2 - 135 psi</div><d=
iv>3 - 60 psi</div><div>4 - 60 psi</div><div><br></div><div>When I put the =
compression tester on number 3, I get blow back through #4 spark plug port.=
=C2=A0 Then when I put it on #4 I get blow back through the #3 spark plug p=
ort.<br><br>Seems to me it&#39;s just a blown head gasket.... am I correct?=
=C2=A0 as far as I&#39;m aware, these heads usually crack between 2 &amp; 3=
, correct?</div><div><br></div><div>TIA<br><br>Alan</div></div>

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