Used Truck Crankshafts, Crankshaft Gears & OEM Engine Parts

Used truck Crankshafts

Crankshafts are one of the most important rotating components inside a truck engine. The crankshaft converts piston movement into rotational force, transfers power through the flywheel and driveline, and works together with bearings, gears, timing components, oil supply and the engine block. On a heavy commercial vehicle engine, even small differences in crankshaft specification, journal size, gear arrangement or timing drive layout can affect fitment and reliability. For workshops, fleet operators and engine rebuilders, matching the correct used OEM crankshaft or related crankshaft component is therefore a technical purchase, not a simple visual match.

This Crankshafts category is part of the Engines & Components section for lorry and truck parts. Stock is based on vehicles dismantled by VRA Truckparts, so the exact items listed can change depending on donor trucks available at the time. Current and related listings may include crankshafts themselves, crankshaft gears and associated drive components. One example from this category is a used genuine MAN crankshaft gear for MAN TGA, TGS and TGX applications, listed with references 51021150278, 51.02115-0278 and 51021150216. As with any used engine component, buyers should check each listing carefully for the included part, part numbers, visible condition, photos and compatibility notes.

What you will find in the Crankshafts category

The Crankshafts category is intended for used OEM crankshaft-related engine parts for commercial vehicles. Because heavy truck engines vary by manufacturer, engine code, emission generation and build specification, availability can be narrow and highly part-number dependent. Depending on current stock and donor vehicles, this category may include:

• Used truck Crankshafts removed from dismantled engines where available, normally requiring careful matching by engine type and OEM reference.
• Crankshaft gears such as MAN TGA, TGS and TGX crankshaft gear parts used in the engine timing and gear train assembly.
• OEM-referenced crankshaft components listed with numbers such as 51021150278, 51.02115-0278 and 51021150216 when shown on the part or confirmed from the donor vehicle.
• Timing drive and gear train parts connected to the crankshaft drive system, where they are best grouped with Crankshafts for buyer navigation.
• Engine rebuild components suitable for workshops replacing damaged, worn or missing crankshaft-related parts with genuine used OEM alternatives.
• Donor-vehicle matched parts photographed after removal so buyers can compare tooth profile, bore, keyway, mounting face, size and visible wear.

Truck brands & typical applications

Crankshafts and crankshaft gears are usually brand and engine specific. The current product example in this category is for MAN TGA, MAN TGS and MAN TGX vehicles and is listed as a genuine MAN crankshaft gear with part number references 51021150278 / 51.02115-0278 and 51021150216. These models cover heavy-duty MAN tractor units and rigids used across UK and European fleets, but compatibility must still be confirmed against the exact engine and part reference. Other truck makes may appear in this Crankshafts category when suitable donor vehicles are dismantled, but buyers should not assume interchangeability between MAN, DAF, Volvo, Scania, Mercedes-Benz, Iveco or Renault engines unless the listing and part numbers support it.

• MAN TGA crankshaft-related parts may vary by engine family, build year and Euro standard.
• MAN TGS applications should be checked against engine code, gear train layout and OEM reference.
• MAN TGX parts must be matched carefully because similar-looking engine gears can have different specifications.
• Commercial vehicle engine rebuilds often require comparing the removed part directly with the listing photos before ordering.
• Fleet and workshop purchases should use registration, VIN, engine code and part number checks where possible.

Why Crankshafts matters

The crankshaft and its drive components are central to engine operation. The crankshaft carries high combustion loads through the connecting rods, keeps rotational movement balanced and drives other engine systems through gears, pulleys or flywheel connections. A crankshaft gear must mesh correctly with the engine timing gear train so camshaft timing, injection timing and auxiliary drives remain accurate. Incorrect gear specification, damaged teeth, poor fitment or mismatched timing components can lead to noise, vibration, timing errors, oil contamination, poor running or major engine damage.

For a heavy truck that spends long periods under load, the quality and compatibility of crankshaft-related parts affects uptime and repair cost. A used OEM crankshaft gear from the correct engine can be a practical option where the original part is worn, damaged or missing, particularly when the listing provides clear photos and genuine reference numbers. However, Crankshafts and related components should always be selected with care, as these parts sit inside critical engine assemblies and are not normally suitable for guesswork or approximate matching.

Typical reasons to replace Crankshafts or crankshaft components

Workshops may look for used OEM Crankshafts or related parts for many different repair situations. Some replacements are part of an engine rebuild, while others are required because a specific gear or drive part has been damaged during failure, strip-down or previous repair work.

• Worn, chipped or damaged crankshaft gear teeth causing noise, poor mesh or timing drive concerns.
• Engine failure where the crankshaft, gear train or related rotating parts have been damaged by debris or oil starvation.
• Incorrectly fitted aftermarket or non-matching parts discovered during rebuild or inspection.
• Keyway, bore, mounting face or locating surface damage on a crankshaft gear or drive component.
• Corrosion, storage marks, heavy staining or visible wear beyond what is acceptable for the repair standard.
• Missing crankshaft-related components after a partial engine, stripped engine block or incomplete donor assembly has been purchased.
• Replacement during preventative rebuild work where the old component shows excessive wear or impact damage.

How to choose the correct Crankshafts

Correct matching is essential with Crankshafts and crankshaft gears because many parts look similar but are not interchangeable. Before ordering, compare the old part and the vehicle data with the listing in detail. Useful checks include:

• Truck make and model such as MAN TGA, TGS or TGX where shown in the listing.
• Engine type and engine code, as crankshaft and gear train parts are often tied to a specific engine family.
• Euro or emissions generation where the engine design changed during production.
• OEM number and alternative references, for example 51021150278, 51.02115-0278 and 51021150216 on the MAN crankshaft gear example.
• Tooth count, tooth profile and gear diameter where the component is a crankshaft gear rather than a complete crankshaft.
• Bore size, keyway, locating features and mounting face compared directly with the removed part.
• Visible condition shown in the photos, including wear marks, staining, oil residue, corrosion and storage marks.
• Donor vehicle details and any notes in the item description about removal, inspection or included parts.

If you are unsure which Crankshafts listing is suitable, use how to find the right truck part for the information normally needed before ordering. For part-number matching, VIN support and vehicle identification guidance, see compatibility and VIN checks. Supplying the registration, VIN, engine code, OEM reference and photos of the old part helps reduce the risk of ordering a visually similar but technically different component.

Used OEM parts from dismantled trucks

VRA Truckparts specialises in used genuine OEM truck parts removed from dismantled commercial vehicles. Crankshafts, crankshaft gears and related engine components are removed from donor trucks, visually inspected where practical, photographed and listed with available part references. The MAN crankshaft gear example is described as visually inspected from all sides after removal and showing normal used wear, light storage marks, oil residue and minor cosmetic staining. This type of detail is important for engine parts because buyers need to understand both the reference numbers and the visible used condition before fitting.

Used OEM parts can be a sensible choice for HGV repairs when new availability is limited, the vehicle is older, or the workshop wants a genuine part rather than an uncertain pattern equivalent. Condition notes and photographs should always be read carefully. Used engine components may require cleaning, measurement or further workshop inspection before installation depending on the repair being carried out. You can read more about the way parts are handled on our dismantling and quality process.

Checking condition before fitting

Because Crankshafts and related parts operate under load and inside the engine, inspection does not stop when the part arrives. Workshops should compare the delivered component against the original part, clean away storage oil or residue where required, and check all functional surfaces before assembly. For a crankshaft gear, this may include inspecting the teeth, bore, keyway, locating face and any timing marks. For a complete crankshaft, checks may include journal condition, measurement, straightness, bearing compatibility and whether any machining is required. VRA Truckparts provides the listing information available at the point of sale, but final fitting decisions should always be made by a competent mechanic or engine rebuilder.

Related categories and engine part support

Crankshafts sit within the wider engine system, so related parts are often purchased alongside other engine components during repair or rebuild work. If you are replacing a crankshaft gear, it may also be sensible to inspect the timing gear train, oil system, bearings, flywheel area and surrounding engine casing before reassembly. Stock changes regularly as different trucks are dismantled, so related engine listings may appear in other VRA Truckparts categories depending on what has been removed and catalogued.

For help identifying parts from donor trucks, visit trucks we dismantle. If you need to understand condition wording before buying used Crankshafts or crankshaft-related parts, see warranty and part condition. These guidance pages are useful for trade buyers who need to confirm whether a used OEM part is appropriate for the job before committing to an engine repair.

Delivery, payment & returns

Before ordering Crankshafts, check that the listing photos, OEM references and vehicle details match your requirement. Engine parts can be heavy, technical and time-sensitive for workshops, so it is worth confirming details before purchase rather than relying on model name alone. Delivery options and shipping information are available on delivery and shipping, while payment and VAT information can be found at payment and VAT. If a part is not suitable, the returns process and conditions are explained on returns and refunds. Always retain packaging and compare the part before installation, as fitted engine components may be subject to different return considerations depending on condition and handling.