Connecting Rod for Hyundai / Kia D4CB 2.5L Diesel — OEM 235104A400 (Set of 4)

This is a set of 4 connecting rods (con rods) precision-manufactured for the Hyundai/Kia D4CB 2.5-liter turbocharged diesel engine, as fitted to the Kia Sorento, Hyundai Starex/H-1, Kia K2500/Bongo, and Hyundai Porter II. The connecting rod is one of the most highly stressed components in any internal combustion engine — it converts the reciprocating linear motion of the piston into the rotating motion of the crankshaft, while simultaneously transmitting combustion forces that can exceed 15,000 N at peak cylinder pressure. A bent, stretched, or cracked connecting rod is a catastrophic failure that can punch through the engine block, destroy the crankshaft, and total the engine. Common causes include hydraulic lock from coolant ingestion, over-revving, or fatigue from high-mileage operation — making rod replacement essential during any major D4CB engine overhaul.

Each connecting rod is forged from heat-treated medium-carbon alloy steel (typically 40Cr or C70S6 grade) using closed-die forging for optimal grain flow alignment along the rod beam — a process that dramatically improves fatigue strength compared to cast or sintered rods. The big-end bore and small-end bushing bore are CNC-machined to exact OEM tolerances, ensuring correct bearing crush and wrist pin clearance. The cap mating surfaces are fractured-split (cracked) using the same technology as the factory rods, creating a unique interlocking surface that guarantees perfect cap-to-rod alignment and superior load transfer across the joint. Weight-matched in sets of four to within ±2 grams to maintain engine balance and minimize vibration. New big-end bolts or studs should always be used during installation.

Direct replacement for Hyundai/Kia D4CB engines in Kia Sorento 2.5 CRDi (2002-2009), Hyundai Starex/H-1 2.5 CRDi, Kia K2500/Bongo III, and Hyundai Porter II. Also fits Hyundai forklifts and industrial equipment utilizing the D4CB engine platform. Always replace with new big-end bearing shells, use assembly lubricant, and torque to factory specification using an angle-tightening procedure. For bearings, gaskets, and engine overhaul components, browse our engine parts collection. Reference OEM part numbers at Hyundai official website.

Technical Specifications

• SKU: 235104A400
• OEM Number: 235104A400
• Type: Forged Steel Connecting Rod — Set of 4
• Material: Heat-Treated Alloy Steel (40Cr/C70S6), Fracture-Split Cap
• Fitment: Hyundai / Kia D4CB 2.5L CRDi Diesel Engine
• Application: Kia Sorento, Hyundai Starex, K2500, Porter II, Forklifts

Compatible Vehicles & Equipment

Kingstream connecting rods are individually oil-wrapped, weight-matched, and packed in compartmentalized rigid cartons. QC includes dimensional inspection of big-end bore, small-end bore, and center-to-center length. 12-month warranty. Contact us for bulk pricing or technical fitment verification.