At some point in time, you'll probably need to know where the engine serial number is on your Navistar engine. Having this number can help ensure that you're getting the correct diesel engine replacement parts when you shop.

Like with other diesel engines, this can be tricky to find if you don't know where to look. We're here to help you find your Navistar diesel engine serial number!

The engine serial number for Navistar engines can be found stamped on a pad on the block. Navistar keeps the location pretty simple. For engines that were built before 2000, that pad can be found on the left side of the block, just under the head-to-block parting line.
. When verifying 6.0L serial numbers, look at the entire serial number to determine build origin. If the sixth digit is the letter Y, then the engine was built in Huntsville, AL and the serial number ends in a range of 0-94,580 for 2003 and 94,581-current for engines built after 2003. If the engine serial number ends within the 6,000,000 series.
All I know is that its the original engine that came in my truck. The International DT530. I've given my vin number hoping that it would help. If there are any other number that may help, please tell me locations and I will forward those number to you.

International Engine Serial Number Location

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How to Find Your Navistar Engine Serial Number

The engine serial number for Navistar engines can be found stamped on a pad on the block. Navistar keeps the location pretty simple. For engines that were built before 2000, that pad can be found on the left side of the block, just under the head-to-block parting line. For engines newer than that, the pad is on the right side of the block, between the oil cooler and the top of the block.

For most Navistar engines that were built after 1993, you will need more than just the engine serial number. You will also need the engine model, model year, horsepower rating, and torque rating, which can all be found on the emission label. The emission label is located on the top of the rocker cover or intake manifold.

Read our blog dedicated to diesel engine serial numbers if you want to know more!

Navistar Engine Serial Number Format

Navistar uses a standard format for their engine serial numbers, which is incredibly helpful for giving information about the engine.

The first three (or four, in some cases) digits indicate the engine model.For example, 466 or 570H.
The number after the engine model indicates the configuration; B is for turbo JWAC, D is for naturally aspirated, G is for turbo air to air, H is for HEUI, and T is for turbo engines.
The next number and letter combination indicates the application; A2 means a service vehicle and M2 means a truck.
The next letter will be the same for all, and is a U, which indicates that the country of origin is the United States.
The last seven digits indicate the unit number, which is the part that will be different for each different engine.

Looking for a rebuild kit? Take a look at our product spotlight on this Navistar inframe kit! It might be the one for you!

The Importance of Your Navistar Engine Serial Number

Engine serial numbers are incredibly important when you have a heavy duty diesel engine. If you have a heavy duty diesel engine, you probably already know that they dont follow the Make-Model-Year formula that automotive engines do. An engine thats a particular model is not guaranteed to be exactly the same as another engine of that same model. Engine serial numbers are a surefire way to get a list of the exact parts that are in your engine.

Gm Engine Serial Number Location

When youre working on your engine and you go to order parts, well need to know your ESN so we can get that list of parts in your engine. This will guarantee that we get you the right stuff. The only additional thing we would need to know is if you have over-sized bearings, or have otherwise changed the engine specifications, as that would not be accounted for in the ESN.

If youre ordering your parts over the phone, you can just tell your salesperson your ESN. If youre ordering online, you will see thatsome product pageshave a field underneath the price where you can input your engine serial number when placing an order. If this field exists on a page, we will need your ESN. Even if you dont supply it when placing the order, youll still probably get a call or email from us asking for it. So, to get your order processed without delays, be sure to input it when you order.

Got questions? HHP has a team of ASE Certified Techs on staff to answer even your toughest questions. Give us a call at 844-304-7688! You can alsorequest a quote online.

Originally Posted November 1, 2017; Edited November 29, 2019

The 7.3L Power Stroke turbodiesel is characterized by its HEUI (hydraulic electric unit injector) injection system, which uses highly pressurized engine oil as a medium for creating fuel pressure directly in the injector body, as a opposed to a system requiring a typical injector pump. In lieu of an injection pump, the 7.3L Power Stroke utilizes a high pressure oil pump (HPOP) and a low pressure lift pump in order to create fuel pressures up to 21,000 psi. In comparison to the prior mechanical injection system, the transition to HEUI promised improved performance, lower emissions, and better fuel economy stemming from increased fuel atomization and greater control over injection events.

The popularity of Ford's International powered F-Series pickups is distinguishable in its production numbers, which greatly exceeded that of any competing manufacturer's diesel sales. By 1999, 1 million Power Stroke equipped trucks had been delivered to dealerships. As demand soared following Ford's introduction of the Super Duty platform, the 2 millionth 7.3L Power Stroke equipped F-Series rolled off the assembly line in 2002. The 7.3L Power Stroke has earned praise as one of the most popular engines offered in a pickup truck, its name synonymous with reliability and longevity.

A greater demand for fuel economy and significantly lower emissions ultimately led to the retirement of the 7.3L during the 2003 model year. For the 2003 MY, the 7.3L Power Stroke was offered alongside the new, smaller 6.0L Power Stroke. By the beginning of the 2004 MY, the 6.0L Power Stroke had completely replaced the 7.3L.

7.3L Power Stroke Specs

Engine:	7.3L Power Stroke diesel V-8
B10 Life:	200,000 miles (~320,000 km)
B50 Life:	350,000 miles (~560,000 km)
Years Produced:	1994.5 - 2003 model years
Universe stylize vhs. Displacement:	7.3 liters, 444 cubic inches
Block/Head Material:	Cast iron block, cast iron cylinder heads

International Engine Serial Number Location