[Fot] [TR] Sealants used on Fo8 gaskets

Tony Drews tony at tonydrews.com
Sun Feb 7 16:14:21 MST 2021 

I suspect the reason so many sealants are successful is that it's not 
really required.  I personally use Gaskacinch on that surface, used to 
use it on head gaskets too before I switched to Cometic head gaskets.

Regards, Tony Drews

On 2/7/2021 11:06 AM, DAVE HOGYE via Fot wrote:
> I like the method of using an old liner to polish the gasket surface. 
> Although a light amount would be nice just to get a good clear image 
> of the surface condition.
> I used the red, High-Tack spray-on sealant with a copper gasket when I 
> put together my first and last and only TR engine build, which is now 
> apart for a refresh after 19 race weekends and a total of 5,500 
> miles.  I sprayed both sides of the gasket, let it tack up and set 
> them in place.  I haven't pulled the liners. I thought I'd just 
> replace the rings and bearings, check and polish the crank and refresh 
> the valves and seats and put it back together.
> I think Marcel has made a good point that it's possible no sealant is 
> necessary if all conditions are otherwise excellent.  The sealant is 
> just added insurance.
> Dave H.
>> On 02/07/2021 12:44 AM van.mulders.marcel--- via Fot 
>> <fot at autox.team.net> wrote:
>> It seems that about all sealants are performing well on the Fo8 
>> gaskets, maybe because there is no need for it? So, most products 
>> won't do any harm, but be aware of anaerobic gasket makers : these 
>> can cure very fast, forming an elastic layer of some thou thickness : 
>> the Fo8 gaskets won't leak, but the cylinderhead gasket will.
>> Marcel
>> ------------------------------------------------------------------------
>> *Van: *"fot" <fot at autox.team.net>
>> *Cc: *"Triumph List" <triumphs at autox.team.net>, "fot" 
>> <fot at autox.team.net>
>> *Verzonden: *Zondag 7 februari 2021 03:17:01
>> *Onderwerp: *Re: [Fot] [TR] Sealants used on Fo8 gaskets
>> Don’t know if it’s my trick or if everyone does it but...
>> Once I’ve got the liner landing as clean as I can get it, I use a old 
>> liner as a hone and by twisting is back and forth with some valve 
>> lapping compound, get a nice shiny ring on the block mating face. 
>> Clean it up good and then use your sealant of choice.
>> Greg “Lunker” Hilyer
>> Albuquerque NM
>>
>> On Feb 6, 2021, at 6:30 PM, Frank Fisher via Fot < fot at autox.team.net 
>> <mailto:fot at autox.team.net>> wrote:
>>
>>     hylomar.
>>     never sets up solid like silicone.
>>     that means you have time to set the liners and go have a scotch,
>>     come back, mess around.
>>     leave it overnight and take up the task again tomorrow.
>>     the best gasket dressing ever invented.
>>     Frank
>>     On Friday, February 5, 2021, 09:52:33 PM PST, Dan Cronin <
>>     adcronin at mi.rr.com <mailto:adcronin at mi.rr.com>> wrote:
>>
>>
>>     Folks
>>     Looking for some background information and recommendations on
>>     the preferred Fo8 gasket sealing compound that seems to have
>>     worked for each of you in your various engine re-builds.  And
>>      any comments / observations you choose to share either on or off
>>     list. The motor I am building has a 89 mm piston and liner kit
>>     from BFE along with Corrello rods / bolts and a Crower dummy main
>>     crank connected at the front with a ATI Super Damper and at the
>>     rear to a Fidanza Alloy Flywheel with diaphragm clutch, an HVDA
>>     conversion with alloy drive shaft to a Quaife 4.11:1 diff. and
>>     alloy back cover.  Stainless Steel valves with 0.050 oversize
>>     intake thru Mang. Bronze guides. H/S roller rockers on alloy
>>     pedestals.  BPNW 270 duration cam. The TR4A head has had 0.040
>>     removed mostly to true things up and remove prior imperfections.
>>      The head chambers have been mildly worked to smooth any sharp
>>     edges and even things out with a resulting chamber volume of
>>     60.5cc each.  I am planning on installing Gasket Works 0.022
>>     copper gasket with their 0.005 “O” compression rings on the head
>>     side of the gasket that will be sprayed with a copper coating on
>>     each side.  Gasket Works sent a set of Fo8 individual gaskets
>>     that has allowed me to obtain a liner protrusion of 0.0025 to
>>     0.003.  Am aiming at a compression ratio of around 9.75 to 1+/- .
>>     Looking forward to as many responses as possible to assist in
>>     trying to get this critical step as close to right as I can.
>>     DC
>>     <IMG_3668.jpeg>
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