Air bleeds - Chevelle Tech
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post #1 of 8 (permalink) Old Oct 3rd, 19, 9:46 PM Thread Starter
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Jack
 
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Air bleeds

I have notice on my carb around the air bleeds there is fuel stains.. I removed one of the hsab and a little bit of fuel came out...What would cause this ??

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post #2 of 8 (permalink) Old Oct 3rd, 19, 10:18 PM
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Tom
 
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Re: Air bleeds

Have you noticed any flooding? If your float sticks fuel comes out of all kinds of places. It could also be percolating when the engine is hot. Pretty common. As long as it's not a sticking float or debris in the needle and seat it's probably nothing to worry about. I'm guessing this is a Holley design?

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post #3 of 8 (permalink) Old Oct 3rd, 19, 10:25 PM
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Scott Foxwell
 
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Re: Air bleeds

Could be pull-over fuel form the pump squirter nozzle.

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post #4 of 8 (permalink) Old Oct 3rd, 19, 10:32 PM
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Tom
 
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Re: Air bleeds

On most Holley designs the squirter outlet is lower and inboard of the bleeds and pullover occurs with airflow going away from the bleeds. Not saying it isn't possible but I haven't seen pullover cause fuel on the bleeds. It would be good to check that the needle is in fact under the squirter just for GP.

70 Camino...Roller

69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt

76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt
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post #5 of 8 (permalink) Old Oct 3rd, 19, 11:06 PM Thread Starter
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Jack
 
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Re: Air bleeds

Quote:
Originally Posted by Tommy the Cat View Post
Have you noticed any flooding? If your float sticks fuel comes out of all kinds of places. It could also be percolating when the engine is hot. Pretty common. As long as it's not a sticking float or debris in the needle and seat it's probably nothing to worry about. I'm guessing this is a Holley design?
No flooding.. I turn off the electric fuel pump a few seconds before I shut the engine off. Just to drain down the fuel bowls. Yes holley design..

Matthew 22: 37-39
R.I.P. Mike Romeo

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post #6 of 8 (permalink) Old Oct 3rd, 19, 11:07 PM Thread Starter
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Jack
 
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Re: Air bleeds

Quote:
Originally Posted by steelcomp View Post
Could be pull-over fuel form the pump squirter nozzle.
What can be done to prevent it...

Matthew 22: 37-39
R.I.P. Mike Romeo

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post #7 of 8 (permalink) Old Oct 4th, 19, 12:02 AM
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Tom
 
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Re: Air bleeds

I didn't realize you were talking about a Dominator. Those squirters are actually above the bleeds so in theory it could happen. Like I said earlier, make sure the weight is under the nozzles and make sure the gaskets are in good shape. It would be unusual to pull fuel out of there. Could it be running down from the vents? What sort of air cleaner do you run?

70 Camino...Roller

69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt

76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt
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post #8 of 8 (permalink) Old Oct 4th, 19, 7:21 AM
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Re: Air bleeds

I have the same carb and the same issue. Ive noticed fuel seep from the bottom of the squirters when pushing the acc pump lever. Ive replaced the squirter gasket, doubled up the gasket, tried new squirters, new squirter bolt, replaced acc pump umbrella, checked needle weight, even lightly filed squirter mounting surface to insure it is flat.
S
Still seeps fuel.

I gave up and just let it seep.
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