Leaking fuel

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

J

jonbgood

Junior Member
Joined
Nov 21, 2024
Posts
15
Reaction score
6
Location
east bay area , California
First Name
Johnny
Truck Year
1977
Truck Model
c20
Engine Size
454
1977 gmc c25
You must be registered for see images attach
fuel is leaking out from this capped off spot. Is this supposed to be connected to anywhere? Also what’s the proper connection for this tube on valve cover? Heavy fuel and exhaust smell while driving, trying to properly connect it all back together . Thanks
You must be registered for see images attach
 
Strick

Strick

Full Access Member
Joined
Nov 25, 2020
Posts
1,425
Reaction score
3,523
Location
Dunn, NC
First Name
Harold
Truck Year
1979
Truck Model
C20 Crew
Engine Size
350
The crankcase vent is supposed to be routed back to the air cleaner. No fuel is supposed to come from any of the vacuum ports on the carb either.
 
J

jonbgood

Junior Member
Joined
Nov 21, 2024
Posts
15
Reaction score
6
Location
east bay area , California
First Name
Johnny
Truck Year
1977
Truck Model
c20
Engine Size
454
Strick said:
The crankcase vent is supposed to be routed back to the air cleaner. No fuel is supposed to come from any of the vacuum ports on the carb either.
Click to expand...
Do you know why it would be coming out of there? Is that vacuum port supposed to be connected anywhere?
 
Strick

Strick

Full Access Member
Joined
Nov 25, 2020
Posts
1,425
Reaction score
3,523
Location
Dunn, NC
First Name
Harold
Truck Year
1979
Truck Model
C20 Crew
Engine Size
350
That is supposed to be hooked to the charcoal canister I do believe. Maybe some fuel vapor but not liquid fuel exiting.

HS
 
R

Ricko1966

Full Access Member
Joined
Apr 11, 2017
Posts
5,603
Reaction score
9,128
Location
kansas
First Name
Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
jonbgood said:
Do you know why it would be coming out of there? Is that vacuum port supposed to be connected anywhere?
Click to expand...
Most likely float level is too high,maybe float is heavy,. Carbureator looks new my 1st guess is not put together correctly from the factory. Do not attach it to the charcoal cannister now,connect it after the problem is corrected. Fuel in the cannister ruins it.
 
fast 99

fast 99

Full Access Member
Joined
Dec 31, 2021
Posts
2,090
Reaction score
3,065
Location
Spokane, Washington
First Name
Brian
Truck Year
81,85
Truck Model
K20
Engine Size
350
Bottom picture finger is pointing at breather. Loops back around into the square hole in air cleaner. Breather filter is missing also needs clip to attach it to air cleaner, sometimes included with filter. Drivers side valve cover should have the PCV valve.
 
DoubleDingo

DoubleDingo

Full Access Member
Joined
Jul 3, 2012
Posts
11,325
Reaction score
17,372
Location
Right where I am
First Name
Bagoomba
Truck Year
1981
Truck Model
81-C20 Silverado Camper Special-TH400-4.10s
Engine Size
Carb'ed Vortec 350
jonbgood said:
1977 gmc c25
You must be registered for see images attach
fuel is leaking out from this capped off spot. Is this supposed to be connected to anywhere? Also what’s the proper connection for this tube on valve cover? Heavy fuel and exhaust smell while driving, trying to properly connect it all back together . Thanks
You must be registered for see images attach
Click to expand...
That carburetor looks like one of those new chinesium quadrajets. From my reading on those, no good. If there's a warranty, return it for a full refund and buy a rebuilt original that fits your application.
 
DoubleDingo

DoubleDingo

Full Access Member
Joined
Jul 3, 2012
Posts
11,325
Reaction score
17,372
Location
Right where I am
First Name
Bagoomba
Truck Year
1981
Truck Model
81-C20 Silverado Camper Special-TH400-4.10s
Engine Size
Carb'ed Vortec 350
jonbgood said:
Do you know why it would be coming out of there? Is that vacuum port supposed to be connected anywhere?
Click to expand...
Because it's a chinesium carburetor. They look great. That's all. Pure junk
 
J

jonbgood

Junior Member
Joined
Nov 21, 2024
Posts
15
Reaction score
6
Location
east bay area , California
First Name
Johnny
Truck Year
1977
Truck Model
c20
Engine Size
454
Ricko1966 said:
Most likely float level is too high,maybe float is heavy,. Carbureator looks new my 1st guess is not put together correctly from the factory. Do not attach it to the charcoal cannister now,connect it after the problem is corrected. Fuel in the cannister ruins it.
Click to expand...
Yea I removed it tonight, it has no numbers or identification.
 
J

jonbgood

Junior Member
Joined
Nov 21, 2024
Posts
15
Reaction score
6
Location
east bay area , California
First Name
Johnny
Truck Year
1977
Truck Model
c20
Engine Size
454
DoubleDingo said:
That carburetor looks like one of those new chinesium quadrajets. From my reading on those, no good. If there's a warranty, return it for a full refund and buy a rebuilt original that fits your application.
Click to expand...
Yea I got it off, probably just going to junk it. Came with truck when I recently purchased. It has no markings on it just a generic Chinese carb I guess
 
You must log in or register to reply here.

Similar threads

Shoote
1987 K10 factory set up dual tank small yellow line leaking fuel
Replies
3
Views
254
Redfish
Redfish
JoshuOne
Fuel return help needed
Replies
11
Views
2K
JoshuOne
JoshuOne
R
Quadrajet hard start fuel bleed off.
Replies
4
Views
762
squaredeal91
squaredeal91
77Matt
Qjet to Edelbrock 1400 vacuum line puzzle- I need help
Replies
13
Views
2K
77Matt
77Matt
G
Rough Idle and Stalling
Replies
6
Views
2K
75gmck25
75gmck25

Latest posts

Forum statistics

Threads
44,419
Posts
957,226
Members
36,758
Latest member
PapaD
Top