[Healeys] Fuel from the manifold drip tubes

[Bob Spidell]

Had a thought (that didn't die of loneliness): 

The intake manifold sits atop the exhaust manifold (on later cars with the 'log' manifold). This is so the exhaust can keep the carbs warm to aid in atomization of fuel and prevent wall-wetting (most other carburetted cars pass warm coolant through the base of the carb to do the same thing). There should be a couple gaskets between, and I've never known for sure if the gaskets are to insulate the intake or to help pass the heat. Probably the former, but if it's the latter and yours are missing that MIGHT be part of the issue. If you've ever pressure-washed your engine you might have destroyed these gaskets. 

Bob 

----- Original Message -----

From: "Bob Spidell" <bspidell at comcast.net> 
To: "healeys" <healeys at autox.team.net> 
Sent: Thursday, November 12, 2015 5:07:47 AM 
Subject: Re: [Healeys] Fuel from the manifold drip tubes 

That's mostly normal when the engine's cold, but shouldn't happen much, 
if at all, once it's been warmed-up. The only explanation I can think 
of is running rich, due to the reasons Alan suggested. I have gotten it 
occasionally on my BJ8 when warm, though. 

Google 'wall wetting' for some technical info, although it mostly 
applies to injected engines (I always assumed it wouldn't happen with 
injected engines, but it can be a problem with them, too). 

Bob 

On 11/11/2015 8:39 PM, Elton Schulz wrote: 
> Fellow Listers, 
> I'm getting a small amount of fuel dripping out from the intake 
> manifold drip pipes from my BJ7 when idling. What causes that? The 
> engine is running well and it doesn't appear to be on the rich side. 
> Thanks, 
> Elton 
> 



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