The fuel pump is located in the fuel tank and the lock ring is utilized to secure the fuel pump and keep the seal leak-free.
Fuel tank lock ring operationOn many fuel-injected vehicles, the fuel pump can be found in the fuel tank and can have leaks and that is where the lock ring comes into play. The lock ring provides a tight seal and maintains that seal until damage has been done. If you notice damage or loss of pressure against the seal then you must replace the lock ring to get that leak-free seal.
Common issues with a faulty fuel tank lock ringA faulty fuel tank lock ring can cause the vehicle to have poor fuel economy, unusual smell, and a loss of pressure.