[Fot] TR intake gaskets

[Tony Drews]

One note of caution on the Remflex gaskets.  The pre-made ones have 
holes for the intakes that are - to me - too large for the narrow 
sealing surface of my weber cannon manifold.  I buy uncut material from 
them and then cut to size using a sharp knife.  That way the intake 
holes are exactly the same ID as the holes in the head and I get max 
sealing surface.  I think they are fine for stock intake manifolds.

I asked them about making ones with smaller holes and they were willing 
to do that if I paid the tooling costs (which weren't horrible).  I 
declined and just make my own gaskets.

I am a big fan of their gaskets.  They are not reusable generally if you 
care about that (I don't).

If you look at the picture shared of the blown out gasket you can see 
that the lower flange of the intake manifold had very little overlap 
with the gasket.

Cheers, Tony Drews

On 4/9/2025 9:08 PM, Lyman Scherer via Fot wrote:
> Phil… pretty sure you are correct on the mis-match of clamping, 
> headers are a mess, intakes ok. All sealing surfaces are good & flat. 
> Going to start from scratch. Remflex gaskets, nice 3/8 shoulder bolts 
> I have, fab new cross clamps, service headers even though had no 
> exhaust leaks. Thx for advice!
> Sent from my iPhone
>
>> On Apr 9, 2025, at 7:46 AM, Bob Kramer via Fot <fot at autox.team.net> 
>> wrote:
>>
>> 
>> Getting to the two bottom nuts gets even more difficult when you add 
>> a support bracketing to take the place of the OEM bolting of the 
>> intake to the exhaust manifold that we lose when using a header, thus 
>> it is easier to get it wrong.
>>
>> On Wed, Apr 9, 2025 at 7:48 AM yellow04 via Fot <fot at autox.team.net> 
>> wrote:
>>
>>     My money is on this one... Blowing out the bottom of the intake
>>     gaskets means you didn't get nearly enough pressure (if any) from
>>     that pesky lower mounting stud and clamp. I have found if you use
>>     anything other than a stock intake manifold and stock exhaust
>>     manifold, you must scrutinize the area where the clamps will sit
>>     to ensure the height is very similar. Or, modify the clamps by
>>     welding on something to make sure when the clamp rests on the
>>     appropriate bits of the intake and exhaust manifold, when the nut
>>     is tightened it puts equal pressure on both manifolds. Obviously,
>>     the mounting face on each manifold needs to be flat. Assuming you
>>     have everything in order, there is no reason a stock manifold
>>     gasket will not work, I have run them when I could not get my
>>     hands on the HD gaskets and they worked fine for me.
>>
>>     Last thought, the nuts that hold the manifolds on are notorious
>>     for loosening up in time, and especially after the first few heat
>>     cycles. And with everything installed, getting to the two bottom
>>     nuts can be a pain. But, failure to keep them properly torqued
>>     leads to blown out gaskets.
>>
>>
>>     On 2025-04-09 06:55, vfracing--- via Fot wrote:
>>
>>>     Lyman;
>>>      another possible cause is a mis match in the thicknesses of the
>>>     intake and exhaust manifold flanges.
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