Peeps,

Hi. I have a '65 Barracuda with a 360ci engine that has a Weiand Stealth intake.

I'm trying to narrow down a hideous smell in the cabin when I drive the car. It could be exhaust or something else. Hard to tell since I can barely smell. But I don't like it.

Looking around I found a puddle of oil on the starboard side of intake just underneath the carburetor where I discovered two holes that somehow previously escaped my attention. Maybe gasses are escaping from there.

What are they? See photos. Thanks!

that is the sideways heat riser passage. not sure what device goes in those 2 holes but yes it would emit exhaust/oil fumes.

Is that something for a mechanical choke? <no idea>

The oil pooling might be caused by oil traveling up the threads of the intake bolts. I've had it happen a few times when I still had a small block. RTV on the threads cures it.

Huh. Who knew?

I think what happened is that they were covered over with the powder coating years ago and then the gas pressure eventually popped them open.

Thanks for the great information.

-m.

Some of the first Edelbrock CH4B intakes had a hole in the exhaust cross over for heat tube to the choke housing mounted on the carb.

On what? A chevy? Cause the choke housing on a MoPar is in the intake and there is no heat tube. The only MoPar intake I am aware of that uses heat tubes is the long horn cross ram set up and you will never see one of those o a 360.

I'm not talking about a 360,don't know about that manifold but all Chrysler in line 2x4 engines be it 361/383/413 used a exhaust manifold heat tube to the choke housing as do the Hemi,the early CH4B had that provision from the heat cross over instead of from the exhaust manifold.I would "assume" all after market intakes of that period could have that provision as the manufacturer would have no idea of what a customer would use as a fuel system and that would cover using a carb with a heat tube is the person chose that route.

Then why bring it up?

We aren't talking about big blocks, we aren't talking about dual inline setups.

Useless information to confuse people.

And [ Moparts Family Site - Keep it Friendly ] is that picture supposed to be of? I see no intake.

Aftermarket manifolds are required to follow the factory choke format? One hole could be for a clean air source and the other supplies heated air for the choke.

Most mopar small blocks used a bi-metal spring to work the choke. It did not use a gas tube (Ford did if I recall). The stock intakes had a cup cast into it and it basically functioned off radiant heat. Much better design than those gas tubes that leak and plug up.
I say most because im not familiar with the older stuff like the old 318 wide blocks and anything pre 65.

Maybe some very early Edelbrock intakes had heat tube holes drilled in the crossover, possibly so various carbs could be used. They weren't there by the late '60s.

I doubt the OP's intake in question was drilled by Weiand. It's too new. The Stealth series didn't come out till 1990-1992 or so.

I don't recall any of the Edelbrock or Weiands having heat tubes for Mopar small blocks.

Mybig block Weiand intake had a similar hole thingy, but it was on the underside of the heat riser, facing down at the valley pan. Like yours, it almost looked like it had a small roll pin shoved into it.

Never leaked or had an issue with it though.

Heat source for choke and most likely not the source of your odor. Unless you or a previous owner drilled down into them they are blind holes from the Weiand factory, in fact the inboard one is probably more of a dimple than a hole.

You can tap the outer hole and and attach a type of divorced choke commonly found on Q Jets of other brands. The inner hole probably would need to be drilled either to tap into a cast passage or heat pipe run through the base of the intake casting. My LD340 on the shelf has a small heat pipe running from one side to the other. Not sure what the stealth has because I'm not going to pop it off the engine or take a drill to it to satisfy my curiosity.

Have you probed the holes to see if they go anywhere? I doubt they do. If either had hot exhaust pouring out of it it would be discolored or soot stained around the hole opening.

Here are the same holes on the stealth intake I bought new. Inboard is a just a dimple outboard is about 1/2 inch deep blind hole.

Also pics of the same "holes" visible beside the carburetor pad on a big block edelbrock, and an LD340 with the q-jet divorced choke added and one without.

Guess back when they first cast these manifold its was cheaper or faster to make a provision for the brand x choke than molding a proper cup for mounting for one of the factory style chrysler chokes.

Actually if you look up the SBM stealth on summit you can see those holes in the stock photo.

That is a 62 300H carb,same as Hemi that requires a heat tube source for the choke,I guess we are talking about two different heat tubes.As for why bring it up,there are applications other than long ram that you stated is the only one require a heat tube of some configuration,the OP ask about the hole in the intake,I merely stated that the early Edelbrock and possibly others had a provision for manifold heat for the choke,and the [ Moparts Family Site - Keep it Friendly ] wasn't necessary !!