<div dir="ltr">I read a couple of people talking about milling the block deck. I have seen two blocks that were milled, one on a club member's car that had head gasket issues and another on a block I was checking to build a race engine. No doubt that both had been milled with the block flat on the milling table. With liners in place, boring plate installed, the deck surface was off by 2 thousands side to side. Not very head gasket friendly. I did some measuring and realized that the figure 8 surface was also off by the same amount. Both could have been the result of sloppy machine work but I came to the conclusion that the factory block deck and figure eight machining was done at the same time. I haven't yet decked a block but if I did I would measure the figure 8 surface relative to the deck first. YMMV.<div><br><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Bob Kramer</div></div></div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Aug 1, 2020 at 4:51 AM Phil Gott via Fot <<a href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Michael;<div>It is also critical that the liners protrude above the block by .005 to .007” to ensure a good seal. This is before any compression of the figure 8 gaskets. If the protrusion is less, the top of the block should be milled to achieve the proper protrusion.</div><div>If you have milled the head more than about .060 you should consider staking the head around the bores between cylinders two and three per the Kastner book. It is weak in this area.</div><div>The rest of the advice you’ve received is pretty sound, but I have not tried all of it.</div><div>Depending on how much you’ve milled the head and what you have done with the combustion chambers, you may need to reshape the fire ring area of your gasket. It must not protrude at all into the combustion chamber.</div><div>Phil<br><br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Jul 31, 2020, at 6:25 PM, Jack Wheeler via Fot <<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div dir="ltr"><span><cite>I've read all of the comments, but haven't heard anything about Cometic. I had rebuilt my TR-3 engine a number of years ago, using the stock head gasket. I built the engine as I would have built one of my race engines in the day, except with a milder cam and less compression (10.5:1). From day 1 it never really ran right. I began to suspect coolant was getting into the combustion chamber, so I bought one of those test kits where you pull some coolant out while the engine is running and add a chemical which tests for hydrocarbons. Sure enough, hydrocarbons were getting into my coolant system. That says bad head gasket or crack in the head. Since I'd had the head magnafluxed during the rebuild, I assumed it was the head gasket.</cite></span></div><div dir="ltr"><span><cite><br></cite></span></div><div dir="ltr"><span><cite>I began asking around about where I could get a good gasket. A guy at a local engine shop (primarily Ford engines) recommended Cometic. I had never heard of them, and told him the engine was over 50 years old, so surely they would not make a gasket for it. He encouraged me to check the internet, and sure enough, they make a whole bunch of them for the TR engine. It's been a few years ago, but as I recall, they had gaskets for different bores (i.e. 83MM, 86MM, 87MM, etc.) and you could order different thicknesses. They stacked steel gaskets on top of each other to get to the thickness desired. I think I ordered a 3 layer gasket. It all sounded a little fishy, but based on the strong recommendation I had received, I ordered one.</cite></span></div><div dir="ltr"><span><cite><br></cite></span></div><div dir="ltr"><span><cite>I removed the bad head gasket and replaced it with the Cometic gasket, and suddenly the engine ran great. I have put almost 7.000 miles on the car since then and haven't had a problem. It runs cool (even on 95 degree days, as tested recently), pulls strong, and no sign of any coolant leaks. By the way, I noticed someone else recommended Hylomar gasket cement. I also used that. A light coat on all sealing surfaces does the trick. Do not spray a thick coat. Below is the link to the Cometic web site. Check it out.<br></cite></span></div><div dir="ltr"><span><cite><br></cite></span></div><div dir="ltr"><a href="https://www.cometic.com/" rel="nofollow" target="_blank">Cometic Gasket - Sealed Under Extreme Pressure</a></div><div><br></div><div id="gmail-m_2554743525888803341ydp48b58523enhancr_card_6247372032" style="max-width:400px;font-family:YahooSans,"Helvetica Neue","Segoe UI",Helvetica,Arial,sans-serif"><a href="https://www.cometic.com/" style="text-decoration:none solid currentcolor;color:rgb(0,0,0)" rel="nofollow" target="_blank"><table style="max-width:400px" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td width="400"><table style="max-width:400px;border-width:1px;border-style:solid;border-color:rgb(224,228,233);border-radius:2px" width="100%" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td><table style="background-color:rgb(255,255,255);background-repeat:repeat;background-image:none;background-size:auto;width:100%;max-width:400px;border-radius:0px 0px 2px 2px;border-top:1px solid rgb(224,228,233)" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td style="background-color:rgb(255,255,255);padding:16px 0px 16px 12px;vertical-align:top;border-radius:0px 0px 0px 2px"></td><td style="vertical-align:middle;padding:12px 24px 16px 12px;width:99%;font-family:YahooSans,"Helvetica Neue","Segoe UI",Helvetica,Arial,sans-serif;border-radius:0px 0px 2px"><h2 style="font-size:14px;line-height:19px;margin:0px 0px 6px;font-family:YahooSans,"Helvetica Neue","Segoe UI",Helvetica,Arial,sans-serif;color:rgb(38,40,42);max-width:314px">Cometic Gasket - Sealed Under Extreme Pressure</h2><p style="font-size:12px;line-height:16px;margin:0px;color:rgb(151,155,167)">Cometic Gasket supplies hi-performance gaskets for a variety of motorsports markets: ATV, Drag Race, Domestic Au...</p></td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table></a></div>Jack<div><br></div><div><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div><br></div>
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On Friday, July 31, 2020, 5:27:49 PM EDT, mleccese1--- via Fot <<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>> wrote:
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<div><font size="2">Phil, Dave,</font></div>
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<div><font size="2">I may have compromised my head gasket last weekend at Lime Rock (Green TR4 #802), can you or someone recommend one that is robust.</font></div>
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<div><font size="2">Thank you</font></div>
<div><font size="2">Michael L<br>
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