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<p>Terry,</p>
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<p> A few times today I ran my TR3 motor to the red line in 1st, 2nd, 3rd, and headed for it in forth but the road was not safe.</p>
<p><br>
</p>
<p> Again I have 89mm liners and skimmed the head 80thou with good head work and an Isky cam. Well balanced... it is held together with ARP nuts and bolts. It has the head gasket offered by Moss for the 89mm liners.</p>
<p><br>
</p>
<p> I would NOT do this again. I would stop at 87MM just because the manner these cars are used do not warrant the extra $$$.</p>
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<div id="Signature"><b><font face="Times New Roman" size="4" color="#ac193d"><em>CHEERS</em></font><br>
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</font><font class="ecxApple-style-span" face="Tahoma" size="4" color="#666666">John Taylor</font>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Triumphs <triumphs-bounces@autox.team.net> on behalf of triumphs-request@autox.team.net <triumphs-request@autox.team.net><br>
<b>Sent:</b> Thursday, September 21, 2017 2:00 PM<br>
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<b>Subject:</b> Triumphs Digest, Vol 10, Issue 246</font>
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Today's Topics:<br>
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1. Re: TR4A head gasket, 87 mm cylinders (Jerry Van Vlack)<br>
2. Re: TR4A head gasket, 87 mm cylinders (TERRY SMITH)<br>
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Message: 1<br>
Date: Wed, 20 Sep 2017 16:15:37 -0400<br>
From: "Jerry Van Vlack" <jerryvv@roadrunner.com><br>
To: <asg123@centurylink.net>, <triumphs@autox.team.net><br>
Cc: 'Friends of Triumph' <fot@autox.team.net><br>
Subject: Re: [TR] TR4A head gasket, 87 mm cylinders<br>
Message-ID: <5823653D3AFB4938BB70216ECA208B1F@UserTHINK><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
I?m interested in the responses too as I recently suffered a head gasket failure around the intake shroud of #4 using a 91 mm Cometic (very similar to the Lucas new improved one) In my case the head is milled .090 using 87 mm liners. The old Payen style lasted
30 or more years until I did a valve job 4 years ago. The Cometic lasted 4 years until it failed. I?ve discovered some extenuating circumstances which may have caused my failure but I am interested in the responses, especially from those who have moved up
to the 89 mm liners. How have you sealed the 89?s and or is it too early to report results? Also please indicate if you?ve milled the head and by how much.<br>
<br>
I?ve discussed this with some very reputable Triumph performance folks in the last week and gotten some good input but would like to broaden the discussion. Once we see some responses I?ll be pleased to share what I?ve discovered. Those who I?ve already discussed
this with can chime in or not, I will include your advice but not who you are unless I have your permission. But I?d like to hear some input from others before I do that.<br>
<br>
Regards,<br>
<br>
Jerry Van Vlack aka JVV<br>
66 TR4A<br>
<br>
<br>
<br>
From: asg123@centurylink.net <br>
Sent: Wednesday, September 20, 2017 1:51 PM<br>
To: triumphs@autox.team.net <br>
Subject: [TR] TR4A head gasket, 87 mm cylinders<br>
<br>
I have asked a similar question before but my mechanic and I are still undecided which rabbit hole to enter<br>
<br>
Does anyone have experience with which head gaskets hold up best against blowing out around the combustion chambers? I see the stainless steel composite gaskets which claim to be the best. But, some people, including the tech support at BPNW, say that the
OE copper gasket by Payen withstands high compression the best. How does the German made Payen copper gasket hold up compared to the Lucas OE type copper gasket? We had an OE copper head gasket blow out between cylinders #1 and #2 after only a few thousand
miles. It was using 93 octane gas with the timing retarded a couple degrees to keep down spark knock, but it still dieseled on when we tried to shut it off. A solid copper head gasket from Gasket Works custom milled to drop the compression to 130psi fixed
the spark knock and dieseling, but we had chronic problems with the oil and water weeping into each other no matter what sealants we tried. As always thanks for your responses. Arnold
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Message: 2<br>
Date: Wed, 20 Sep 2017 17:23:37 -0400 (EDT)<br>
From: TERRY SMITH <terryrs@comcast.net><br>
To: asg123@centurylink.net, triumphs@autox.team.net<br>
Subject: Re: [TR] TR4A head gasket, 87 mm cylinders<br>
Message-ID: <113222587.14812.1505942618617@connect.xfinity.com><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Hi, Arnold. I'm not sure about the 4A but suspect it's got cylinder liners. The real trick--ask me how I know!--is making sure the liners stand proud by .003 or close all the way around the cylinder. As I'm sure you already know, cinch the liners into the new
figure 8 gaskets using the head bolts and sockets until you get them right. List advice has always seemed to be that copper compressible gaskets serve better for a long-term seal than steel. ISTR that Payen was recommended as best, but am not sure it's available
anymore. My current head gasket is from TRF and is holding up extremely well, after all prep was meticulously done. Then again, I don't rev the engine over 4k despite my driving has historically been "spirited." Others on the List are certainly more qualified
than I, so hope they respond too.<br>
Terry Smith, '59 TR3A<br>
New Hamsphire<br>
<br>
<br>
> On September 20, 2017 at 1:51 PM asg123@centurylink.net wrote:<br>
> <br>
> I have asked a similar question before but my mechanic and I are still undecided which rabbit hole to enter<br>
> Does anyone have experience with which head gaskets hold up best against blowing out around the combustion chambers? I see the stainless steel composite gaskets which claim to be the best. But, some people, including the tech support at BPNW, say that
the OE copper gasket by Payen withstands high compression the best. How does the German made Payen copper gasket hold up compared to the Lucas OE type copper gasket? We had an OE copper head gasket blow out between cylinders #1 and #2 after only a few thousand
miles. It was using 93 octane gas with the timing retarded a couple degrees to keep down spark knock, but it still dieseled on when we tried to shut it off. A solid copper head gasket from Gasket Works custom milled to drop the compression to 130psi fixed
the spark knock and dieseling, but we had chronic problems with the oil and water weeping into each other no matter what sealants we tried. As always thanks for your responses. Arnold<br>
> <br>
<br>
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