[Fot] [TR] TR4A head gasket, 87 mm cylinders

Wed Oct 25 12:08:54 MDT 2017

Like some of you, I have had to buy multiple thicknesses of the liner
seals from Mordy to get the desired protrusion for each cylinder, since we
are talking about the thickness of a human hair.  

On Wed, Oct 25, 2017 at 10:20 AM, Mordy Dunst via Fot <fot at autox.team.net>
wrote:

> Tr4 cylinder sleeves/liners  compress no less than .001”at 100 ftlbs
> clamping.  Some may compress more than others.  Solid copper gasket
> installation requires attention to details.
>
> MDunst Headgasket.com 626.358.1616
> Fax 626.628.3777
> Triple R Munitions, Inc 626.201.9471
> T FFL 6,7 SOT 2
>
> On Wednesday, October 25, 2017, van.mulders.marcel--- via Fot <
> fot at autox.team.net> wrote:
>
>
> ..."copper fire ring is a must" : John, do you mean on the steel shim
> gasket, or also on the solid copper gasket? I wonder if a fire ring on the
> solid copper gasket is necessary when the sleeves are protruding above the
> block?
> Marcel.
> Van: "fot" <fot at autox.team.net>
> Aan: "Mordy Dunst" <gasket.works at verizon.net>
> Cc: "fot" <fot at autox.team.net>
> Verzonden: Dinsdag 24 oktober 2017 15:21:35
> Onderwerp: Re: [Fot] [TR] TR4A head gasket, 87 mm cylinders
>
> When I order my solid copper head gasket from Mordy, I ask that the
> scallop be made on the intake valve only.  There's no reason to scallop
> around the exhaust valve and reduce the sealing surface.  There's always an
> amount of fine tuning of the head gasket to match the scallop on the head
> and liners based on your milling.  Never used a steel shim gasket- too
> thin. Copper fire ring is a must.
>
>
> On Sat, Oct 21, 2017 at 10:51 AM, Mordy Dunst via Fot <fot at autox.team.net>
> wrote:
> The .032” copper headgaskets I supply to moss motors are pre- scalloped
> for  valve relief on head.  Hondabond or yammabond ( pain in the butt)
> seals.
>
> Best
> Mordy
>
>
> MDunst Headgasket.com 626.358.1616
> Fax 626.628.3777
> Triple R Munitions, Inc 626.201.9471
> T FFL 6,7 SOT 2
>
> On Friday, October 20, 2017, Joe Boruch via Fot <fot at autox.team.net>
> wrote:
>
> This has been an issue for years, and it has delayed me putting my TR3
> engine back together.  I have used a steel shim gasket for years with
> success, but it takes me 5 or so hours to put the gasket together, after
> grinding to properly fit the bores and then fitting the copper wire in the
> fire rings, then coating it with copper coat or Yamabond.
>
> It would be great to have a Cometic MLS gasket to just install and be
> done.  I spoke to Cometic about this some years ago and they wanted me to
> buy a large quantity (50 or 100, I forget) to justify the development
> costs.  I spoke with a couple of our TR part sellers, but since they had
> invested in tooling for steel shim gaskets (or others), they were not
> interested in pursuing this for their businesses.  The current Cometic
> gaskets do not account for the unshrouded intake valve.
>
> On a semi-related note, has anyone considered or tried having cylinder
> sleeves pressed into a block to eliminate the "wet" sleeves with the figure
> 8 gaskets at the bottom of the sleeve?  I am now racing a Honda S2000 and
> with my recent engine build I had Darton steel sleeves pressed in to
> eliminate the damaged aluminum bores (also 87mm bore).  There are Darton
> wet sleeves that completely eliminate the aluminum bores and dry sleeves
> that are pressed into bored out aluminum bores.  I was thinking that the
> Darton wet sleeves could maybe work in the TR3/4 block.  If sleeves are
> pressed in, the tops can be decked level with the block and eliminate the
> need to have the sleeves protrude above the block deck.   Joe(B)
>
>
> ---------- Original Message ----------
> From: patrickmannion1 via Fot <fot at autox.team.net>
> To: Jerry Van Vlack <jerryvv at roadrunner.com>, asg123 at centurylink.net,
> triumphs at autox.team.net
> Cc: 'Friends of Triumph' <fot at autox.team.net>
> Subject: Re: [Fot] [TR] TR4A head gasket, 87  mm cylinders
> Date: Wed, 20 Sep 2017 18:18:13 -0700
>
> Hi Jerry, I'm about to use Moss Motors supplied 89mm liners. For years
> we've used standard liners, milled the head for 10:1 and higher street use.
> Carefully removing the lip on the head around the intake valve and notching
> and indexing each liner to match material removed from the cylinder head
> shrouding. Using 89mm liners (bigger bore) you will remove less material
> from the head to raise compression. If liner projection is correct we've
> used the steel shim head gasket BPNW have the correct gasket, be
> conservative in removing material. The heagasket also needs to be trimmed
> to compensate for material removed from the liner/intake port shroudind on
> the head. In modifying the head gasket you do not want it to "hang into"
> the combustion chamber or you will get detionation and gasket damage.
> Finally carefully use contact cement and glue a single strand of .012"
> Copper wire into the groove that is around the circumference of each
> cylinder of the gasket. I think I have pictures or can take some this
> weekend. We've done this for many years on lots of TR and Morgan race
> engines and have had great success and no failures.
>
>
>
>
>
>
> t
>
>
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