What is the function of a fuel injector leak off pipe?
The leak off pipes link the injectors to a spill rail, which takes excess fuel back to the injection pump and then back to the tank. They are small braided hoses that can wear over time and can introduce air into the system.
How diesel leak off pipes work?
The reason that diesel engine has a Diesel Leak Off Pipe is that the fuel is injected by the Injectors. There is another function that the Diesel Leak Off Pipe provides, is a pressure over flow port, in that way the fuel has some place to go when it gets too much pressure, and is released back to the tank.
Is a leaking fuel injector dangerous?
Leaking fuel injectors are a fire hazard and has the potential to cause severe and costly engine damage. It is important to identify them and take care of the problem as quick as possible.
How to fix a leaking CDI fuel injector?
After you’ve disconnected fuel and electrical parts (great care due to high pressure etc), you have to remove the two small screws which hold the injector clamp in place. You will probably need a form of slide-hammer which is screwed to the top of the injector, to get it out. Not a job for the feint-hearted!
What does it mean when your fuel injector is leaking?
Leaking fuel injectors can cause Oil Thinning At engine shutdown the fuel pressure should maintain operating pressure or just below that for a substantial period of time. Fuel injector pintle, ball or disc seat leaks as well as the bottom O-ring leak on a side feed injector will cause fuel to escape into the intake manifold.
What to do if you have a diesel injector problem?
Start the engine and watch for the darkening/spotting of the brown paper with diesel spray, this will indicate quite clearly where the problem lies. Once identified the work can begin – Run the engine until nice and warm then turn it off and remove the keys.
How long does it take to fix a leaking CDI?
Even if you have to spend another 50 or so on tools, it is cheaper than having this done at a dealer. After you have spent a half hour with the manual and are ready to start work, plan on about 2 hours per injector as an average time if you are working fairly quickly. Re: Mercedes C220 CDI – Easy to Fix Leaking Injectors?
Leaking fuel injectors can cause Oil Thinning At engine shutdown the fuel pressure should maintain operating pressure or just below that for a substantial period of time. Fuel injector pintle, ball or disc seat leaks as well as the bottom O-ring leak on a side feed injector will cause fuel to escape into the intake manifold.
Can a cracked fuel injector cause an engine fire?
Any external fuel injector leaks such as a cracked fuel injector body or bad fuel injector O-rings can cause an engine fire at any given time. At engine shutdown the fuel pressure should maintain operating pressure or just below that for a substantial period of time.
When to replace fuel injector seals and washers?
If the O-ring fitted to the injector is the problem; then replacing this O-ring will usually fix the leak. If the injector body; nozzle or internal components are cracked; then a new or refurbished injector is your only option. Replacement fuel injector seals and washers are cheap and are, fairly easy to install.
What causes wear and tear on fuel injectors?
Driving a car hard, combined with short start stop journeys, will increase the wear and tear on injectors. Letting the engine cool down, before shutting it off, will increase the lifespan of the injectors. This will also, benefit the rest of the engine too.