[TR] Triumphs Digest, Vol 10, Issue 246

dave dave at ranteer.com
Thu Sep 21 19:54:15 MDT 2017


I'm going to disagree.  I put 89's in my TR4 and am very glad I did.  I'm
told that makes the displacement 2.4 liters if nothing else is changed.  Of
course, that's not true!  Anyway, I've got a polished and ported head and
mild cam (I did not do either of those) and this engine spins up like
nothing I've ever driven.  Its really fun to drive.  I figured its only a
few more bucks to go to the 89, why not?  So glad I did.

 

I did not rebuild the engine, but I know it has a special head gasket,
probably from TSI automotive or maybe BPNW.  With 89s, you have put in a
special gasket.

 

From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of j t
Sent: Thursday, September 21, 2017 5:54 PM
To: triumphs at autox.team.net
Subject: Re: [TR] Triumphs Digest, Vol 10, Issue 246

 

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 -   <http://brattleborocameraclub.com/> Brattleboro Camera Club

 

 




 

  _____  

From: Triumphs <triumphs-bounces at autox.team.net
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Sent: Thursday, September 21, 2017 2:00 PM
To: triumphs at autox.team.net <mailto:triumphs at autox.team.net> 
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
<mailto:jerryvv at roadrunner.com> >
To: <asg123 at centurylink.net <mailto:asg123 at centurylink.net> >,
<triumphs at autox.team.net <mailto:triumphs at autox.team.net> >
Cc: 'Friends of Triumph' <fot at autox.team.net <mailto: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 <mailto:asg123 at centurylink.net>  
Sent: Wednesday, September 20, 2017 1:51 PM
To: triumphs at autox.team.net <mailto: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 <mailto:terryrs at comcast.net> >
To: asg123 at centurylink.net <mailto:asg123 at centurylink.net> ,
triumphs at autox.team.net <mailto:triumphs at autox.team.net> 
Subject: Re: [TR] TR4A head gasket, 87 mm cylinders
Message-ID: <113222587.14812.1505942618617 at connect.xfinity.com
<mailto: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
<mailto: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 <mailto:triumphs at autox.team.net>  **
> 
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> 
 
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