[TR] Triumphs Digest, Vol 10, Issue 246
j t
jat1127 at hotmail.com
Thu Sep 21 16:53:39 MDT 2017
Terry,
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.
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.
I would NOT do this again. I would stop at 87MM just because the manner these cars are used do not warrant the extra $$$.
CHEERS
Johnny
~~~~~~~~~~~~~~~~~~~~~
John Taylor
Greenfield, MA 01301 USA ~ Life is not a race.....you do not want to finish first.
My Flickr Album<https://www.flickr.com/photos/taylored-photos>
Member - Brattleboro Camera Club<http://brattleborocameraclub.com/>
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Sent: Thursday, September 21, 2017 2:00 PM
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Subject: Triumphs Digest, Vol 10, Issue 246
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Today's Topics:
1. Re: TR4A head gasket, 87 mm cylinders (Jerry Van Vlack)
2. Re: TR4A head gasket, 87 mm cylinders (TERRY SMITH)
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Message: 1
Date: Wed, 20 Sep 2017 16:15:37 -0400
From: "Jerry Van Vlack" <jerryvv at roadrunner.com>
To: <asg123 at centurylink.net>, <triumphs at autox.team.net>
Cc: 'Friends of Triumph' <fot at autox.team.net>
Subject: Re: [TR] TR4A head gasket, 87 mm cylinders
Message-ID: <5823653D3AFB4938BB70216ECA208B1F at UserTHINK>
Content-Type: text/plain; charset="utf-8"
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.
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.
Regards,
Jerry Van Vlack aka JVV
66 TR4A
From: asg123 at centurylink.net
Sent: Wednesday, September 20, 2017 1:51 PM
To: triumphs at autox.team.net
Subject: [TR] TR4A head gasket, 87 mm cylinders
I have asked a similar question before but my mechanic and I are still undecided which rabbit hole to enter
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
Date: Wed, 20 Sep 2017 17:23:37 -0400 (EDT)
From: TERRY SMITH <terryrs at comcast.net>
To: asg123 at centurylink.net, triumphs at autox.team.net
Subject: Re: [TR] TR4A head gasket, 87 mm cylinders
Message-ID: <113222587.14812.1505942618617 at connect.xfinity.com>
Content-Type: text/plain; charset="utf-8"
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.
Terry Smith, '59 TR3A
New Hamsphire
> On September 20, 2017 at 1:51 PM asg123 at centurylink.net wrote:
>
> I have asked a similar question before but my mechanic and I are still undecided which rabbit hole to enter
> 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
>
> ** triumphs at autox.team.net **
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