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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>…exactly what I had with the Ward Spl motor after a tyre kicking non-buyer floored the throttle in overdrive top at about 40kph going uphill! Detonation big time! I put some crack testing penetrating dye in no3. Spun the motor over then checked no.4 with some paper towel – bingo red dye in no.4 = blown gasket.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Cheers<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Peter Linn<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Brisbane<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Healeys <healeys-bounces@autox.team.net> <b>On Behalf Of </b>Alan Seigrist<br><b>Sent:</b> Monday, 25 January 2021 7:56 PM<br><b>To:</b> Healey list <Healeys@autox.team.net><br><b>Subject:</b> [Healeys] 100-4 engine head gasket?<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>All -<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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><br>1 - 135 psi<br>2 - 135 psi<o:p></o:p></p></div><div><p class=MsoNormal>3 - 60 psi<o:p></o:p></p></div><div><p class=MsoNormal>4 - 60 psi<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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><br>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?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>TIA<br><br>Alan<o:p></o:p></p></div></div></div></body></html>