Help me with my leaking Carb

[matthud]

Can someone tell me what this part of the carb does, and why it would leak gas up from underneath around the rod. Thanks.

 

[photovette]

It's the accelerator pump. The o-ring seal is worn out--time to rebuild the carb.



Either that or the gas is too scared to go down the throat of that 427...

 

[matthud]

Is this linked to the idle circuit at all? My car seems to be idling very rough since this started leaking.

 

[photovette]

If that seal is leaking, then the others are leaking too for sure--air is getting in where it shouldn't no doubt--and messing up the idle. Rebuilding the carb will fix it. It's not that hard, just go slow and lay everything out in the order it came off.

 

[matthud]

Where is the best place to get a rebuild kit? And is everything that I need in 1 kit?

 

[photovette]

I've gotten them at Carquest and had no complaints; everything is in there. You'll need a couple cans of carb cleaner and a nylon brush. There's only a few parts inside; they're just a bit tricky to get back in--but they will go eventually.

 

[wishuwerehere82]

Good call Photovette!

You can get a rebuild kit from Advance auto for about $30.00
Here's an article from Corvette Fever that will walk you through doing it yourself.
http://www.corvettefever.com/howto/53360/

 

[photovette]

That's a good link--it looks a little scary in the black&white images though--kind'a like the 'tear the engine down' section in Chilton's. 2 hours for a dirty carb and a beginner, 20 minutes if you've done it before.

 

[wishuwerehere82]

Matthud,

Is this the 69 you were looking at in Scottsdale?

 

[matthud]

Yes it is. I'm surprised anyone remembered that posting.

 

[wishuwerehere82]

Memory like an elephant here. From your other postings, it sounds like it's a good weekend to rebuild that carb. You will be very pleased with the results. It's easy.

 

[matthud]

Unfortunately the car is 900 miles away, so thats out of the question right now.

 

[JohnZ]

Get the numbers from the driver's side of the carb near the rear (stamped vertically on the rib); you'll need them to get the right rebuild kit (it may or may not be the original carb).

 

[MMM]

I really bet the float is bad and that is why gas is coming up around the accelerator pump shaft. That would also explain the idle problems. Strongly recommend you purchase and install a new float along with the carb kit. The composite plastic floats used in Q-Jets are the #1 reason for problems with the carbs. I always replace the float everytime I rebuild a Q-jet. The two types of plastic floats used are those that have failed and those that are about to fail.

Mike