How much do you know about diesel engine fuel pumps? This part is one of the most vital components, allowing for combustion to occur.
There are several different kinds of fuel pumps, including rotary, inline, and high-pressure common rail. In this post, we're going to take you through each of these and some signs to look out for if your pump is failing.
While each type of fuel pump works a little differently, they all serve the same purpose—to move fuel through the system and into the combustion chamber. The three types of fuel pumps we're covering today are: the rotary pump, the inline pump, and the high-pressure common rail pump.
As you might gather from the name, a rotary pump has more of a circular design. The output lines are positioned in a circle, and it has a distributor. This distributor is turned by a drive shaft. There are different types of rotary pumps you might see, including ones that are electronic. These are often found on older engines.
An inline pump is a bit different from the rotary pump. Where the rotary pump has the output lines in a circle, and inline pump has them all in a straight line. Unlike other types of fuel pumps, each cylinder on an inline pump operates on its own, also allowing them to fail separately.
A high-pressure common rail pump has a bit of a different design from the rotary and inline pumps. It is more similar to the HEUI oil pump.
A high-pressure common rail pump has revolving pistons, as well as one inlet and one or two outlets. In this design, the outlets are connected to a rail that supplies the pressure to the system. With an inline or rotary pump, you're getting a specific amount of pressure applied every time. A common rail pump lets the rail handle the pressure and the ECU takes care of the fuel distribution.
Are you having problems with your John Deere fuel pump? Check out our post featuring reman diesel engine fuel pumps for John Deere engines!
When you experience a failure in your diesel engine, you want to quickly identify the issue to get back up and running. Depending on the type of fuel pump you have, you could see different issues that point to a failing fuel pump.
If you have a rotary pump on your engine, you might see:
Failures on an inline pump include:
With a high-pressure common rail pump, you could experience:
There are other kinds of diesel engine failure that might produce similar symptoms. That's why proper diagnosis is the key to any repair.
Think you might be having trouble with a different fuel system component? Read our post explaining diesel engine fuel injectors.
If your fuel pump fails, you want to make sure you're putting the best quality part in your engine. That's where Highway & Heavy Parts comes in!
We know that with the tight tolerances and moving parts, diesel fuel pumps have a lot of failure points. Poor fuel system maintenance and the use of contaminated diesel fuel can wreak havoc on all the sensitive fuel system components, leading to expensive repairs.
HHP takes the risk out of buying parts! We only sell fuel system components that are built by reputable, OE-certified manufacturers that use the latest OE-approved diagnostic, calibration, and testing equipment available. Not only does this ensure that your fuel pump is manufactured to meet or exceed original OEM specifications, but it also is going to be the same pump your engine was built with.
With a fuel pump from HHP, you'll be getting reduced noise, higher torque, lower emissions, and better fuel economy than you would with a lesser quality pump from a non-OE supplier.
If you need a fuel pump or any other diesel engine replacement part, we can help you find the right fit for your engine! Give our ASE Certified Techs a call at 844-304-7688. Or, you can request a quote online.
We get it- when you need Diesel Engine Parts, time is of the essence. That's why we've developed the HHP Online Quoting System.
Just fill out the form with your name, engine information, and the parts you need, and our ASE-Certified Technicians will get back to you with an estimate. It's as close to magic as a diesel engine gets!