2004 MITSUBISHI PAJERO MINI

Typical onset: 60,000-100,000 mi

Symptoms: Loud ticking or tapping at idle that persists after warm-up, Rough cold starts with clattering noise, Loss of power or hesitation under load

Fix: The 4A30T uses hydraulic lifters that collapse when oil passages clog or oil quality degrades. Single lifter replacement is 3-4 hours; doing all lifters (recommended) is 6-8 hours including valve cover, cam carrier removal, and adjustment. Many shops pull the head for access, adding time.

Estimated cost: $800-1,500

Typical onset: 80,000-140,000 mi

Symptoms: White smoke from exhaust, especially after sitting, Coolant consumption with no visible leaks, Overheating under load or climbing hills, Milky oil or oil in coolant reservoir

Fix: Small turbo engines run hot; the 4A30T is especially sensitive to coolant neglect or turbo cooling issues. Head gasket job requires 10-14 hours: R&R head, resurface (usually warped 0.003-0.008 inch), new gasket set, timing belt while you're in there. Head studs instead of bolts recommended for turbo applications.

Estimated cost: $1,800-2,800

Typical onset: 70,000-120,000 mi

Symptoms: ATF puddles under front of vehicle, Transmission slipping or delayed engagement when low on fluid, Burnt ATF smell

Fix: Steel hardlines and rubber hoses to the external cooler crack from heat cycles and road salt (if driven in winter climates). Cooler itself can seep at crimps. Replacing lines is 2-3 hours; if the cooler is leaking, add another hour and the cost of the cooler. Flush and refill ATF afterward (another 1 hour).

Estimated cost: $400-900

Typical onset: 90,000-130,000 mi

Symptoms: Blue smoke on acceleration, Loud whistle or grinding noise from engine bay, Sudden loss of boost and power, Engine oil consumption increases noticeably

Fix: The tiny turbo spins fast and relies on clean oil. Skipped oil changes or running low kills the bearings. Replacement is 6-8 hours: remove heat shields, downpipe, oil feed/return lines, coolant lines. Aftermarket turbos available but OEM quality varies. Must address root cause (oil starvation, clogged oil return) or the new one fails quickly.

Estimated cost: $1,200-2,200

Typical onset: 100,000-150,000 mi

Symptoms: Vibration at idle or specific RPM ranges, Visible wobble of crankshaft pulley, Serpentine belt wear or squealing, Rubber ring separating from outer pulley

Fix: The rubber isolator in the harmonic balancer degrades with heat and age. Replacement is 2-3 hours: remove serpentine belt, pulleys, and press or pull the balancer off the crank snout. Must use proper puller to avoid crank damage. Timing belt access makes this easier if you combine jobs.

Estimated cost: $350-700

Typical onset: 120,000+ mi

Symptoms: Severe lifter noise that doesn't improve with fresh oil, Check engine light with cam/crank correlation codes, Metal shavings in oil filter during inspection, Rough running and misfires

Fix: Extreme neglect or running low on oil scores the cam lobes and journals. Camshaft R&R is 8-10 hours: head removal usually required for proper access, new cam, lifters, timing components, and often a head resurface. This is engine-out territory in some cases. Expect to find collateral damage (bearings, oil pump).

Estimated cost: $2,000-3,500