Monday, November 25, 2013
How to Remove Injectors From a Cummings 5 9
The Cummins 5.9-liter engine has six cylinders and uses diesel fuel. Its most common use is in agricultural machinery and full-size Dodge pickup trucks made from 1989 through 1998. The Cummins 5.9-liter engine uses direct fuel injection to deliver fuel to the combustion chamber with a pressure of at least 3,550 pounds per square inch, or PSI. The procedure for removing the fuel injectors is generally the same for all Dodge trucks with the 5.9-liter Cummins engine.
Instructions
- 1
Remove the cable from the negative battery terminal with a socket wrench. This prevents the engine from starting during the fuel injector removal.
2Disconnect the throttle linkage and its bracket with a socket wrench, if necessary, to access the fuel injectors. The fuel injectors for the 5.9-liter engine are on the left side of the cylinder head.
3Detach the fuel lines from the fuel injectors. Each of the six fuel injectors has its own high-pressure fuel line. Disconnect the mounting bolts for the fuel drain manifold with a socket wrench and remove the manifold from the engine.
4Unscrew the fuel injectors with a deep well socket and remove them from the injector bores. Discard the copper washer from the diesel injector and use a new washer when you install the fuel injector.
5Clean the injector bore and surrounding area with a wire brush to remove any combustion deposits.
