Caterpillar Engine Parts - New and Used

Caterpillar Components, Assemblies, and Parts

Where to find the Caterpillar engine serial number?

The Caterpillar Engine Serial Number (ESN) is most commonly found on a metal nameplate attached to the engine block. Typical locations include: the side of the block, near the oil cooler, or the valve cover. The ESN usually consists of a 3-character alphanumeric prefix (e.g., S6P, 5HK, 99C) followed by a string of digits. If the plate is unreadable, the serial number is often stamped directly onto the engine block casting or available in the machine's electronic control panel.

CAT Internal Combustion Engine Parts

Trust the experts who know every detail of CAT engines

In the construction and mining industries, there is no room for guesswork. Buying parts for a Caterpillar engine is an investment in operational continuity, and we know that every hour of downtime for an excavator or bulldozer is a real financial loss. Wibako is not just a distributor – we are practitioners. Our journey with the CAT brand began in the workshop, with hundreds of disassembled units and thousands of hours spent diagnosing HEUI or ACERT systems. At Wibako, you won't find random replacements. We only offer components that have passed our internal load tests and proven their value in the toughest working conditions. If a manufacturer has failed us – their parts will never reach your engine.

From the service experience:

Recently, a Caterpillar C9 engine came to our workshop after a premature injection system failure. The cause was low-quality injector tips that were "leaking" fuel, leading to a burnt piston after only 300 operating hours. This incident reminds us and our customers that saving on parts is often a false economy. At Wibako, we emphasize precision: whether it's injectors, oil pumps, or In-frame repair kits – we only provide proven solutions from OEM suppliers or original components. Quality verification at Wibako is the foundation on which we build your trust.

Professional Technical Advisory

Karol, your expert for Caterpillar engine parts

Choosing the right parts for a CAT engine is not just a matter of the catalog number - it's a matter of certainty that the machine will return to the site without the risk of another failure. At Wibako, we don't leave you alone with a catalog.

Karol is responsible for component selection in our team - our key spare parts specialist with 15 years of experience in the construction machinery industry.

Why is Karol's help crucial?

Overhaul cost optimization: Karol will advise you when it's worth investing in a complete repair set (Overhaul Kit) and when replacing individual elements is enough to restore the engine to full efficiency.

Access to Bosch and Motorservice partner knowledge: As an expert working for an official partner of these brands, Karol has direct insight into technical bulletins and changes in part numbering. He can instantly check if a given Bosch injector has been replaced by a newer, improved version, ensuring you access the latest technological solutions.

Real-time availability verification: Instead of searching through dozens of websites with outdated stock levels, one phone call to Karol gives you a clear answer.

Assembly precision and failure risk elimination in Caterpillar units

Expert component selection for CAT drivetrains

In Caterpillar engines, the regeneration process is not just about replacing components, but primarily about rigorous control of critical parameters. As a partner of MS Motorservice and Bosch, Wibako provides parts that must meet tolerances measured in micrometers. Our approach is based on eliminating assembly errors, which are the most common cause of secondary failures after an overhaul.

HEUI and ACERT Injection Systems - Purity and Calibration
In engines like CAT C7 or C9, the heart is the hydraulic-electronic unit injector (HEUI) system. At Wibako, we place great emphasis on advising regarding the purity of the oil system, which controls injection in these units. We remind you that oil contamination as small as 10 microns can lead to cavitation of the control valves in the injectors. When selecting Bosch injection tips, we always verify the serial numbers (ESN) to ensure perfect fuel dose mapping, which directly translates to engine performance and fuel consumption.

Crankshaft Fit and Lubrication Dynamics
When assembling repair kits for the "bottom-end" of the engine (e.g., for the legendary 3306 or 3406 series), a key stage is the analysis of the crankshaft journals. Caterpillar shafts are often surface-hardened, which requires precise selection of bearings. We verify bearing clearances, which for main journals must fall within tight tolerances (often within 0.070 - 0.150 mm). Too tight a fit under heavy machine load leads to oil film rupture, which is why at Wibako we select oversized bearings with surgical accuracy.

In-frame Repair Kits and Combustion Chamber Sealing
In C13 and C15 series units, "In-frame" overhauls are often performed (without removing the block from the machine). Here, the geometry of the cylinder liner seating is crucial. We verify the so-called liner protrusion, which in CAT engines must be identical for all cylinders (often with an allowable difference of only 0.05 mm between adjacent liners). Uneven protrusion is the most common cause of head gasket burnout under heavy load. At Wibako, we provide sealing kits with increased thermal resistance, guaranteeing head pressure stability for thousands of operating hours in difficult terrain.