HELP - carb gasket question

[Kaz the Minotaur]

I took off the plastic carb mounting block, the brown one that mounts to the engine, and the carb mounts to it. I noticed a small, factory made, hole on the lower half of the intake, in the center, to the left of the lower mounting bolt hole. This hole has a matching passage way through the mounting block that lines up with a small hole on the carb. The small carb hole is centered below the buterfly. It doesn't look like it goes anywhere. What is this hole? Will it hurt anything if I get RTV gasket maker in it?


There isn't much room below the gasket to spread a bead of gasket maker around.

 

[RampageHopUps]

That hole needs to be clean. I just poke it through with a nail and clean out the rtv.

 

[MOfroggy]

Rob,


Do you put RTV on all of your gaskets or just the intake side? If you do put RTV on do you put it on both sides of a gasket or just one side?

 

[RampageHopUps]

I put RTY on both sides of all gaskets. Not sure if its right, but it seems to work for me.

 

[Kaz the Minotaur]

Will it work right with only RTV?


What will happen if that hole is obstructed?

 

[RampageHopUps]

RTV only, as in no gasket will be a bad idea. The machined surfaces aren't tight enough for that.


That hole is some kind of pressure release I think. When the piston comes down, that pressure has to go somewhere.

 

[MOfroggy]

I put RTY on both sides of all gaskets. Not sure if its right, but it seems to work for me.

If it works for you I will be doing it from now on!! Any particular "brand" you prefer?

 

[RampageHopUps]

I just use auto store stuff.

 

[MOfroggy]

I will give it a try, eliminating any possible air leaks should be a top priority to keep you from going crazy getting cranked!


I have access to some high temp RTV from Auto Zone.

 

[Kaz the Minotaur]

The kind I have is made by Permatex.


Assuming that the RTV gasket maker is too thin the engine will just run bad right? Presumably it won't hurt it unless it is run like that for a long time? What would happen if a dried peice was sucked into the engine? It is pretty soft even when dried.

 

[RampageHopUps]

You aren't trying to form a gasket like in a car application. You are helping the paper gasket to stay sealed. A light application is all thats needed.

 

[lancier]

What is RTV ot RTY?

 

[Kaz the Minotaur]

It is like silicone only it withstands high temperatures and is designed to be used in place of a traditional gasket.