When to overhaul injectors on older Mercedes diesel engine?
When the injectors are getting old, the spray pattern will not be optimal and it will also release pressure at the wrong pressure. This impairs performance and fuel economy. In the long run the time and investment overhauling the injectors will quickly surpass fuel expenses and frustration over poor performance.
What kind of injectors does a Mercedes OM617 use?
I got my OM617 engine down to using only 6.5L/100km after replacing the nozzles to a new Monark type and overhauling the injectors. That’s absolutely incredible for a 3.0L diesel engine with technology dating back from the 70s.
What do you use to test Mercedes injectors?
Of the special tools needed for the job, the most significant for testing the release pressure and spray pattern, is the fuel injector pressure tester, this tool is so awesome so it can even be used on Mercedes gasoline injectors.
Can you change the injectors on a Mercedes 617?
There is no point of doing this job unless you did the valve adjustment prior (check out How to Adjust the Valves on a Diesel 617-engine). When the injectors are getting old, the spray pattern will not be optimal and it will also release pressure at the wrong pressure.
What should I do if my Mercedes fuel pressure is zero?
If your Mercedes doesn’t start, check the fuel pressure. If you are getting zero reading, you either have an electrical problem or a bad fuel pump. If the check engine light is on, consider yourself “lucky” as it can make your diagnosis easier. Note that not all faults will trigger the check engine light.
How to change nozzles on Mercedes diesel engine?
Before changing the nozzles, a fuel system purge should be done. Use special diesel engine fuel cleaner by disconnecting the fuel line to the tank and running the engine straight from a little container with the fuel return line pouring it in to this container. Run the engine until the diesel cleaner is used up.
What causes a Mercedes Benz fuel pump to fail?
Typically problems related to the fuel pump and fuel pressure include: Under normal operation conditions, the fuel pump provides a constant flow of fuel. A failing fuel pump typically delivers too little fuel from the gas tank or in certain cases too much. Mercedes-Benz cars use an electrical fuel pump to pump the fuel to the fuel injectors.
If your Mercedes doesn’t start, check the fuel pressure. If you are getting zero reading, you either have an electrical problem or a bad fuel pump. If the check engine light is on, consider yourself “lucky” as it can make your diagnosis easier. Note that not all faults will trigger the check engine light.
How do you break a Mercedes fuel injector?
Breaking fuel injectors loose with breaker bar, extension and 27mm socket. 1. Start by cleaning out the base of the opening where the new crush washer will sit (nozzle plate). Use a paper towel or good shop towel to clean out any carbon or debris. Try not to let anything drop into the pre-chamber. 2.
How can I tighten my fuel injector line?
Tighten the injector line nuts at the pump, if you tightened the nuts at the injectors, back them off a turn or two so we can bleed the air out of the lines. This is the bottom of the washer and should point down. 6. Install new return line hose.
What do I need to overhaul my injectors?
Injector tools and parts for overhauling the injectors. Most notably is the pressure tester. You will also need a shim set for adjusting and brass cleaning tools. Before changing the nozzles, a fuel system purge should be done.
When the injectors are getting old, the spray pattern will not be optimal and it will also release pressure at the wrong pressure. This impairs performance and fuel economy. In the long run the time and investment overhauling the injectors will quickly surpass fuel expenses and frustration over poor performance.
What kind of fuel injectors do I Need?
1. Fuel injectors. Make sure you have the correct quantity and type for your car. 240D,TD-4 units, 300D,CD,TD and 300SD-5 units thru 1985. 2. Heat shields/crush washers. One for each injector. 3. Fuel return line. One meter cut properly will give you enough to replace the line between the injectors, the end plug and the return to the fuel tower.
How do you remove a fuel injector in a Mercedes?
1. Remove the fuel injector hard lines with the 17mm open end. Depending on the body of your wrench you will have to tilt the wrench at an angle to break it loose. Keep the lines together as a set and place them in a clean area.
1. Remove the fuel injector hard lines with the 17mm open end. Depending on the body of your wrench you will have to tilt the wrench at an angle to break it loose. Keep the lines together as a set and place them in a clean area.
Is there an error with my fuel injector?
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