Diesel Injection Pump and Injectors FAQ

How much does a pump or injector repair cost?

Repair costs depend on the make, model and part number of your fuel injection pump or injectors. Nameplate information here. Oregon Fuel Injection has many rebuilt and new exchange units in stock at a set price so you know ahead of time how much it will cost. If we do not have one on the shelf we would provide an estimate to rebuild your pump or injectors, after disassembly.

Can you fix only what is wrong with my injection pump?

Yes. For example, you may have a leak around the throttle shaft that could be repaired without having to completely rebuild the pump. However, some “partial” failures are signs of what is going to happen to the rest of the pump in a short time. It would not make sense to do a partial repair if other parts in the pump are badly worn, or may fail shortly because two partial repairs are often more expensive than a complete overhaul.

How long will it take to fix my pump or injectors?

Repair times vary depending on the type of pump or injectors. In some cases we may be able to set an appointment ahead of time. For minor repairs or testing our service goal is 1 – 2 days turnaround. Rebuilding will usually vary from 2-7 days depending on model and parts availability. Contact Us with the part numbers, off of your unit, and we would be happy to let you know what kind of turnaround we can provide. We stock many rebuilt and new injection pumps and injectors so that the only downtime you should have is the time it takes to replace the old unit with the rebuilt one.

Do you repair Roosa Master injection pumps?

Yes. Stanadyne bought the Roosa Master brand, and we are a factory authorized service dealer for Stanadyne.

Do you repair CAV or Lucas CAV injection pumps?

Yes we do. CAV stood for Charles Anthony Vandervell, and the CAV brand was Lucas. Lucas CAV (Lucas Varity and Lucas Diesel Systems) were later purchased by Delphi Diesel Systems. We are a factory authorized service dealer for Delphi Diesel Systems.

Do you rebuild Diesel Kiki Injection Pumps and Injectors?

Yes, Diesel Kiki is now Zexel fuel systems, and we are a factory authorized service dealer for Zexel.

Is there a rebuild kit for my injection pump?

No, most injection pumps have a seal and gasket kit or there are separate seals and gaskets for them. Hard parts are a replaced after examination, when worn or if they fail testing. There are not rebuild kits like there are for an engine rebuild.

Can I rebuild my own injection pump?

Rebuilding an injection pump is more than just replacing seals. Replacing the seals and gaskets on an engine would not mean you have a rebuilt engine. Worn hard parts need to be replaced, settings made and pump calibration set. Disassembly and reassembly of an injection pump requires special tools to prevent damage and properly set for optimum operation. You could fix a fuel leak, but repairing problems such as rough run, miss, or excessive smoke will require examining and replacing hard parts and proper calibration.

Can I rebuild my own injectors?

Replacing the nozzle without lapping and testing is not our idea of a rebuild. Some injectors require special tools to prevent damage during disassembly. Two spring and common rail injectors require special tools to properly set, in order to pass testing. Settings are achieved with shims in various sizes, you will not know what size you need until settings or testing is done. We use a lapping block and polishing block to clean and flatten mating surfaces. Injectors are tested and must meet a maximum pressure and or flow specification.

Should I use a diesel fuel additive?

Yes, we recommend the Stanadyne Performance Formula. This fuel conditioner is beneficial for many engine and fuel systems applications as it provides cleaners and lubrication for the fuel system. It also provides a cetane boost for cleaner burning, more power and better mileage. DO NOT use a diesel fuel additive that claims to disperse water. Dispersing water in the fuel will allow it to pass through the fuel filter. If it passes through the fuel filter it will drop out in the injection pump or injectors and cause contamination damage.

Can I turn up the fuel to get more horsepower?

Depending on the application, there are often many ways to increase power without violating emissions laws. Just turning up the fuel, without air flow improvements or other changes, may create higher exhaust gas temperature (EGT), excessive smoke and is usually not emissions legal.