Engine Dimensions & Weights

The dimension tables below, organized by engine family, list the nominal length, width, height, and weight of common engine models. Note that dimensions may vary due to model year changes and optional equipment, including single alternator vs dual alternator versions. Measuring an engine within an engine bay is not an exact science, but these dimensions will give you a general idea and good starting point in planning your engine swap or diesel conversion.

Power Stroke Diesel Engine Dimensions

Engine	Length	Width	Height	Weight
7.3 Power Stroke V-8	34.0 inches	32.0 inches	36.0 inches	920 lbs (dry)
6.0 Power Stroke V-8	35.0 inches	38.3 inches	40.7 inches	966 lbs (w/ oil)
6.4 Power Stroke V-8	32.0 inches	34.0 inches	38.0 inches	1,130 lbs (w/ oil)
6.7 Power Stroke V-8	44.4 inches	33.3 inches	33.7 inches	1,100 lbs (w/ oil)
3.2 Power Stroke I-5	---	---	---	514 lbs (w/ oil)
3.0 Power Stroke V-6	34.7 inches	30.0 inches	27.9 inches	501 lbs (w/ oil)

Cummins Diesel Engine Dimensions

Engine	Length	Width	Height	Weight
5.9 Cummins 6BT I-6	34.75 inches ^[1]	24.9 inches	37.9 inches	975 lbs (w/oil)
5.9 Cummins ISB I-6	34.75 inches ^[1]	24.9 inches	37.9 inches	1,100 lbs (w/ oil)
6.7 Cummins ISB I-6	41.7 inches	28.6 inches	37.8 inches	1,150 lbs (dry)
3.9 Cummins 4BT I-4 ^[2]	30.6 inches	24.6 inches	37.7 inches	745 - 782 lbs (dry)
4.5 Cummins QSB I-4	32.2 inches	28.1 inches	34.5 inches	818 lbs (w/ oil)
2.8 Cummins R2.8 I-4	25.1 inches	25.0 inches	28.0 inches	503 lbs (w/ oil)
5.0 Cummins ISV V-8	---	---	---	899 lbs (dry)

[1] - Length measured from rear of engine block to front engine mount; this length is approximately 0.5 inches longer than that measured from the rear of the engine block to the front of the cooling fan.
[2] - Dimensions and weights vary slightly with application type and related accessory equipment; models designated for vehicle applications may differ than those intended for machinery applications.

Duramax Diesel Engine Dimensions

Engine	Length	Width	Height	Weight
6.6 Duramax V-8 (all gens)	30.0 inches	30.0 inches	32.0 inches	835 lbs (dry)
2.8 Duramax I-4	25.4 inches	25.8 inches	34.1 inches	520 lbs
3.0 Duramax I-6	35.75 inches	35.98 inches	35.55 inches	467 lbs

Additional Engines | Ford IDI, GM 6.2/6.5, EcoDiesel Engine Dimensions

Engine	Length	Width	Height	Weight
International 6.9/7.3 IDI V-8	30.0 inches ^[1]	27.0 inches	27.0 inches ^[2]	995 lbs (dry)
6.2 GM/Detroit V-8	30.0 inches	26.0 inches	26.0 inches	750 lbs (dry)
6.5 GM/Detroit V-8 ^[3]	30.0 inches	26.0 inches	26.0 inches	750 lbs (dry)
3.0 EcoDiesel V-6	27.3 inches	28.7 inches	27.4 inches	505 lbs (w/ oil)

[1] - Length measured from rear of engine block to front of accessory drive; does not include cooling fan.
[2] - Height measured from bottom of engine block to top of engine; oil pan sump not included and varies with application (i.e. pickup versus medium duty).
[3] - Overall dimensions are larger for turbocharged 6.5 diesels; turbocharger hangs off of the passenger side exhaust manifold.

Highlights

When it comes to diesel conversions and engine swaps, physical dimensions are only half the battle; diesel engines tend to be hefty and their weight must be taken into consideration, particularly in smaller vehicles.
Big engines require a big cooling system; ensure that the there is adequate space in your converted vehicle for an appropriately sized radiator and engine cooling fan.
Certain engines listed above may have additional packaging restraints that includes accessory drive components, an intercooler, turbocharger, or other necessary equipment.