26300-4Z300
26300-4Z300
Kia
2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996
Engine System
Engine Oil Filter
| Quantity: | |
|---|---|
Product Description
The 26300-4Z300 engine oil filter assembly is designed for light commercial diesel vehicle applications, integrating a die-cast aluminum housing, filter element and pressure relief valve into a single unit. Manufactured to Kia OEM specifications and compliant with ISO/TS16949 automotive quality standards, it is suitable for commercial fleet operators and authorized service centers, supporting bulk supply for vehicle maintenance and parts distribution.
Parameter Category | Specification |
OE Number | 26300-4Z300 (also written as 263004Z300) |
Official Name | FILTER ASSY-ENGINE OIL / COMPLETE OIL FILTER HOUSING |
Interchange OEM Numbers | 26300-4X300, 0K5511-4300A, 263004X300, 0K55114300A |
Applicable Engines | Kia D4BF / D4BH 2.5L turbocharged diesel engines |
Assembly Net Weight | Approx 5.00 kg (11.02 lbs) |
Spin-on Filter Dimensions | 94mm OD × 122mm H |
Filter Thread Size | M26 × 1.5 |
Bypass Valve Opening Pressure | 1.0 bar |
Package Size | 320 × 220 × 180 mm |
Main Housing Material | High-pressure die-cast ADC12 aluminum alloy |
Filter Media | Cellulose filter media, 5-30 micron filtration grade |
Sealing Gaskets | High-temperature oil-resistant nitrile rubber |
Fasteners | High-strength carbon steel with zinc plating |
Production Standard | Manufactured to Kia OEM standard, compliant with ISO/TS16949 automotive quality certification |
Alternative Aftermarket Part Numbers | OFA-HY-015, 661263004, KIA-OFH-4Z300 |
The main housing is produced via high-pressure die casting with ADC12 aluminum alloy, with an anodized surface treatment. The integrated design combines the filter mount, internal oil passages and pressure relief valve into a single cast unit. The spin-on filter uses cellulose filter media with a 5-30 micron filtration grade, designed to remove metal debris, sludge and contaminants from engine oil. Sealing gaskets are made of nitrile rubber with oil-resistant properties for elevated temperature operation.
The assembly includes a built-in bypass valve set to open at 1.0 bar. This valve allows continuous oil flow when the filter element becomes clogged, to prevent oil starvation during cold starts or high-contamination conditions. The aluminum housing supports heat dissipation to stabilize oil temperatures during operation.
This oil filter assembly is compatible with Kia Bongo, K2500, K2700, K3000, Pregio and Besta models, covering model years 1996-2020. It matches D4BF and D4BH 2.5L turbocharged diesel engines, with mounting hole positions and oil passage locations aligned with original equipment specifications, requiring no modification for installation.
Under regular maintenance conditions, the assembly has a service life of 60,000-80,000 km for commercial vehicle operations. For turbocharged diesel engines, oil and filter replacement is recommended every 5,000-7,500 km.
Always replace all gaskets and O-rings when installing a new assembly. Replace mounting bolts if they show signs of stretching or corrosion. Torque specifications are as follows: oil filter cap 31.5-38.5 N·m (23-28 lb-ft); housing mounting bolts 25-30 N·m (18-22 lb-ft); filter cap drain plug 8.8-10.8 N·m (6.5-8.0 lb-ft). Tighten housing bolts in a crisscross pattern for even load distribution.
Use ethylene glycol-based, aluminum-compatible coolant to prevent corrosion of internal components. Flush the cooling system every 40,000-60,000 km to remove accumulated contaminants.
For bulk orders, the minimum order quantity ranges from 500 to 1000 units. Packaging options include standard OEM packaging, neutral packaging and custom branded packaging to fit commercial procurement requirements.
Internal cooler core corrosion, thermal cycling fatigue, or manufacturing defects in bonding can cause cracks in the cooler core, leading to fluid mixing. Symptoms include a milky substance on the oil dipstick, oily residue on coolant, and simultaneous drops in fluid levels. If detected, stop operation immediately. Drain all contaminated fluids, replace the full assembly, and flush both systems before refilling with specified fluids.
Aged and hardened base gaskets, improper bolt torque, or corrosion and warping of the mounting surface can cause external leaks from the housing base. Symptoms include oil seepage at the housing-engine block junction, and gradual oil level drops. To resolve, remove the housing, clean both mating surfaces, install a new base gasket, and tighten bolts in a crisscross pattern to specified torque.
Worn or damaged O-rings, over-tightening causing O-ring distortion, or under-tightening with insufficient sealing pressure can cause leaks around the filter cap. To resolve, drain oil from the housing, remove the cap, replace the old O-ring, lubricate the new O-ring with clean engine oil, and tighten the cap to factory torque specification.
A bypass valve stuck open will reduce idle oil pressure and allow unfiltered oil to circulate, accelerating engine wear. A valve stuck closed will cause excessive oil pressure, which can damage filter seals and engine bearings. The bypass valve is an integral component and cannot be replaced separately; full assembly replacement is required if valve failure is confirmed.
Cracks in the aluminum housing can result from thermal stress, over-tightening, or impact damage. Cracked housings cannot be repaired reliably and may fail completely under engine operating pressure. Immediate replacement of the full assembly is recommended if cracks are detected.
