What can cause a fuel tank to collapse?
What can cause a fuel tank to collapse?
A tank collapses because a complete vacuum has been created in the plumbing system and, due to the tank having the largest surface area, it is generally one of the weaker points in the plumbing system; relatively speaking. A vacuum is the absence of pressure.
Why is my fuel tank collapsing on my GMC Sierra?
I’m also having this problem with my 2000 GMC Sierra SL c2500 5.7. It creates a vacuum and collapses the fuel tank. Im on my third fuel tank but didn’t realize at first a vacuum was crushing it. Any ideas? It seems the more I read, the more possibilities that could cause it but its getting expensive with the tanks and pumps.
What causes high pressure in a gas tank?
High pressure can occur if any part of the EVAP system fails, becomes clogged or is restricted. The most common points of failure are a kinked fuel vapor line, a clogged EVAP canister or a failure in the purge control or vent solenoid.
Why is my fuel tank not venting properly?
If not, the problem is in the canister or purge circuit. The canister captures the vapors, which are drawn into the engine through the purge valve on the manifold. The vapors should not be escaping to atmosphere. Thanks for the info, both of you.
How is fuel venting done on a GM Truck?
The gas cap is sealed, the venting is done through the line Tim mentioned. There are three lines to the tank. 3/8, 5/16, and 1/4 inch. 3/8 is the supply line. Fuel is pumped through this line from the tank to the fuel metering body. (No TBI on a 97 Vortec). The 5/16 returns excess fuel from the metering body back to the tank.
I’m also having this problem with my 2000 GMC Sierra SL c2500 5.7. It creates a vacuum and collapses the fuel tank. Im on my third fuel tank but didn’t realize at first a vacuum was crushing it. Any ideas? It seems the more I read, the more possibilities that could cause it but its getting expensive with the tanks and pumps.
If not, the problem is in the canister or purge circuit. The canister captures the vapors, which are drawn into the engine through the purge valve on the manifold. The vapors should not be escaping to atmosphere. Thanks for the info, both of you.
The gas cap is sealed, the venting is done through the line Tim mentioned. There are three lines to the tank. 3/8, 5/16, and 1/4 inch. 3/8 is the supply line. Fuel is pumped through this line from the tank to the fuel metering body. (No TBI on a 97 Vortec). The 5/16 returns excess fuel from the metering body back to the tank.
Why is my gas tank making a thunk noise?
Heard some noise in the general area of the gas tank, hard to describe but not the fuel pump whine I heard in the past. On a whim, removed the gas cap (I had actually heard the gas tank making a ‘thunk’ sound while having the problems, and it relieved a bunch of pressure.
