2011 MITSUBISHI PAJERO MINI

Typical onset: 80,000-130,000 mi

Symptoms: loud ticking or clattering on cold start that may persist when warm, loss of power and rough idle, check engine light with misfire codes, valve adjustment does nothing because lifters are hydraulic

Fix: Replacing all lifters requires cylinder head removal on the 4A30T due to cam tower design. You're looking at 8-10 hours labor for head R&R, lifter replacement, new head gasket, and valve cover gasket. Many shops resurface the head while it's off since warping is common. If one lifter is collapsed, replace all twelve.

Estimated cost: $1,800-3,200

Typical onset: 90,000-150,000 mi

Symptoms: white smoke from exhaust on startup, coolant loss with no visible leaks, overheating under load or in traffic, milky oil on dipstick or cap, rough idle and misfires

Fix: The 4A30T runs high boost for a kei engine and the OEM multi-layer steel gaskets fatigue. Head removal, resurface (almost always needed—check for warpage over 0.003 inches), new gasket set, ARP studs recommended if available, timing belt while you're in there. Budget 10-12 hours labor. Do not reuse the old head bolts.

Estimated cost: $2,200-3,800

Typical onset: 70,000-120,000 mi

Symptoms: ATF puddles under engine bay, driver side, burnt transmission fluid smell, transmission slipping or delayed engagement when fluid is low, visible corrosion on steel cooler lines at crimps

Fix: The steel lines rust through at the crimped fittings or where they pass the subframe. Replacement lines are hard to source; many techs fabricate custom lines or use universal transmission cooler hose with AN fittings. Also inspect the small external cooler itself for leaks. 2-3 hours labor if lines are available, longer if fabricating.

Estimated cost: $400-900

Typical onset: 100,000-140,000 mi

Symptoms: severe vibration at idle that smooths out above 1500 RPM, visible wobble of the crank pulley when engine is running, serpentine belt walking off or shredding, rumbling or knocking from front of engine

Fix: The rubber isolator in the harmonic balancer separates or the outer ring shifts. This will destroy the crank seal, alternator bearings, and eventually the crank itself if ignored. Replacement requires pulley puller and installer tools; some models need impact method. 2-3 hours labor. OEM part is NLA in some markets—aftermarket quality varies.

Estimated cost: $500-950

Typical onset: 80,000-130,000 mi

Symptoms: clunk when shifting from Park to Drive or Reverse, excessive engine movement visible when revving in Park, vibration through floorboard at idle, transmission lever feels notchy or catches

Fix: The rear transmission mount (crossmember side) fails from age and oil contamination. It's rubber and usually soaked in ATF from the cooler line leaks. Replacement is straightforward: support trans with jack, remove four bolts, swap mount. 1-1.5 hours labor. Always inspect for ATF leaks while you're under there.

Estimated cost: $180-350

Typical onset: 120,000+ mi

Symptoms: catastrophic valvetrain noise (grinding, scraping), severe loss of power, metal shavings in oil, cam position sensor codes, engine may not start or runs on two cylinders

Fix: Usually caused by neglected oil changes or running low on oil. The 4A30T has small oil passages and the turbo demands clean oil. Cam lobes wear flat, scoring the head. Requires cylinder head removal, new camshaft, all lifters, head resurface, and sometimes new rocker arms. If bearings are damaged, you're into full head rebuild or replacement. 12-16 hours labor minimum.

Estimated cost: $3,500-6,000