2023 DAIHATSU HIJET

Typical onset: 80,000-120,000 mi

Symptoms: Rattling noise on cold starts that subsides after warm-up, Check engine light with timing correlation codes, Rough idle or hesitation, Metal shavings in oil during changes

Fix: Timing chain, guides, and tensioner replacement requires 8-10 hours labor due to tight engine bay access. Engine must be supported and motor mounts loosened to gain clearance. Often find worn cam gears during inspection requiring additional parts. This is the big-ticket item on these engines.

Estimated cost: $1,800-2,800

Typical onset: 60,000-100,000 mi

Symptoms: Persistent ticking or tapping from valve cover especially when cold, Noise that doesn't quiet down after 30 seconds of running, Rough running or misfires in advanced cases, Oil pressure warning if lifter fragments circulate

Fix: Individual lifter replacement takes 4-5 hours, but most techs recommend doing all 6 cylinders while you're in there (6-7 hours total). Requires valve cover removal and careful tracking of rocker arm positions. Oil passages should be flushed. Extended oil change intervals accelerate this issue significantly on the KF engine.

Estimated cost: $800-1,200

Typical onset: 90,000-140,000 mi

Symptoms: White smoke from exhaust, Coolant loss without visible leaks, Oil milky on dipstick, Overheating under load, Bubbles in coolant reservoir

Fix: Head gasket job on the KF requires 12-14 hours including head removal, surface milling, and reassembly. Turbo trucks run higher cylinder pressures making this more common than naturally aspirated versions. Always check head for warpage—resurfacing adds 2 hours and $150-250. Timing components and water pump typically replaced during this job.

Estimated cost: $2,200-3,500

Typical onset: 70,000-110,000 mi

Symptoms: Transmission fluid spots under vehicle, Pink or red fluid mixing with coolant in overflow tank, Harsh or delayed shifts when transmission overheats, Transmission slipping after highway driving

Fix: The internal oil cooler in the radiator develops leaks allowing coolant and ATF to mix—a death sentence for the transmission if not caught early. Requires radiator replacement and complete transmission fluid flush. If contamination reached transmission, expect rebuild or replacement adding $2,500-4,000. Takes 3-4 hours for cooler/radiator replacement alone.

Estimated cost: $600-900

Typical onset: 100,000-150,000 mi

Symptoms: Vibration that worsens with RPM, Serpentine belt wear or tracking issues, Visible separation between hub and outer ring, Squealing from belt area, Check engine light with crank position sensor codes

Fix: The rubber isolator in the harmonic balancer degrades over time, especially in hot climates. Replacement takes 2-3 hours requiring removal of accessory belts and front engine components. Use OEM or quality aftermarket—cheap replacements fail within 20,000 miles. If balancer comes apart while driving, expect collateral damage to timing cover and sensors.

Estimated cost: $400-650

Typical onset: 50,000-90,000 mi

Symptoms: Clunking when shifting from park to drive or reverse, Excessive vibration at idle in gear, Visible sagging of transmission when inspected from below, Shifter feels loose or imprecise

Fix: The rubber transmission mount deteriorates faster on these trucks due to the engine position and torque characteristics of the turbo three-cylinder. Replacement takes 1.5-2 hours and requires supporting the transmission. Always inspect engine mounts at same time—they typically fail within 10,000 miles of each other. Easy DIY job for home mechanics with a floor jack.

Estimated cost: $200-350