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<div>That is one of the possible causes of the failure. But it does not explain why the failure is confined to the rear 3 cyls of the engine. Unless they are naturally hotter cylinders &/or they naturally receive less lubrication.</div>
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<div>I am still hoping to receive comments about Piper Cams.</div>
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<div>Thanks,</div>
<div>Gary Hodson <br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: Ed O'Neal <Ed@wadsworthoneal.com><br>
To: warthodson <warthodson@aol.com>; healeys <healeys@autox.team.net><br>
Sent: Mon, Mar 26, 2018 9:20 am<br>
Subject: RE: [Healeys] cam failure<br>
<br>
<div id="AOLMsgPart_2_ae2d009a-5680-4bc7-a61e-f076083f589b">
<style scoped="">#AOLMsgPart_2_ae2d009a-5680-4bc7-a61e-f076083f589b td{color: black;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;}@font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;}.aolReplacedBody p.aolmail_MsoNormal,.aolReplacedBody li.aolmail_MsoNormal,.aolReplacedBody div.aolmail_MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";}.aolReplacedBody a:link,.aolReplacedBody span.aolmail_MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;}.aolReplacedBody a:visited,.aolReplacedBody span.aolmail_MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;}.aolReplacedBody span.aolmail_EmailStyle17 {mso-style-type:personal-reply; font-family:"Arial","sans-serif"; color:windowtext; font-weight:normal; font-style:normal;}.aolReplacedBody .aolmail_MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";}@page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;}.aolReplacedBody div.aolmail_WordSection1 {page:WordSection1;}</style>
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<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>I trust the engine oil being used had the right concentration of</span><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>
</span><span lang="EN" style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Zinc dialkyldithiophosphate</span><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>? Proper concentrations should be 1500 to 1700 ppm. Current engine oils are
at about 500 – 600 ppm.</span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'> </span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'><a href="mailto:ed@wadsworthoneal.com" target="_blank" rel="noopener noreferrer">ed@wadsworthoneal.com</a></span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'> </span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Edward J. O’Neal, P.E., Pte.</span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Wadsworth O’Neal Associates, Inc.</span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>6418 Commerce Park Drive</span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>Fort Myers, Florida 33966</span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>phone: (239) 245-8728</span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'>cell: (239) 410-6174</span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'> </span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'> </span></div>
<div class="aolmail_MsoNormal"><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'> </span></div>
<div class="aolmail_MsoNormal"><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Healeys [<a href="mailto:healeys-bounces@autox.team.net?">mailto:healeys-bounces@autox.team.net</a>]
<b>On Behalf Of </b><a href="mailto:warthodson@aol.com">warthodson@aol.com</a><br>
<b>Sent:</b> Sunday, March 25, 2018 11:15 AM<br>
<b>To:</b> <a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a><br>
<b>Subject:</b> [Healeys] cam failure</span></div>
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<div>
<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>A friend recently had a reground cam fail after a few years of normal use. The engine had been professionally rebuilt. There are several possible explanations,
however one unusual thing he discovered is that the wear on the lobes & tappets is only apparent on cylinders 4,5 & 6. The worst visible wear is on the exhaust valve lobe/tappet of Cyl 6. & the least wear is on the exhaust valve lobe/tappet of Cyl 4.</span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Cyls 1,2 & 3 appear to be in very good condition. </span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Does this suggest any specific cause for the failure? </span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>He will be having the cam & tappets replaced & will be using a
<u>Piper Camshaft</u>, for an Austin Healey 3000, it is Part No. AH3BP270 (Fast Road) and is from a “billet” and not a regrind.</span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Are the Piper Cams generally considered good quality?</span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Any comments on this subject would be appreciated.</span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span></div>
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<div class="aolmail_MsoNormal"><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Gary Hodson</span></div>
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