2002 HYUNDAI ACCENT

Typical onset: 80,000-130,000 mi

Symptoms: White smoke from exhaust, especially on cold starts, Milky oil on dipstick or oil cap, Coolant loss with no visible leaks, Rough idle and misfires across multiple cylinders, Overheating episodes that come and go

Fix: The G4ED aluminum head is prone to microcracking between valves, often requiring complete head replacement rather than just gasket. Machine shop inspection shows these cracks even when gasket looks blown. Figure 8-12 hours labor for head removal, inspection, resurfacing if savable, new timing belt kit, and reassembly. Many shops quote head replacement because used heads are $200-400 and avoid comeback risk.

Estimated cost: $1,200-2,200

Typical onset: 90,000-140,000 mi

Symptoms: Deep knocking sound from lower engine, worse under load, Metallic rattling at idle that disappears above 2000 RPM, Sudden oil pressure warning light, Metal shavings visible in oil during changes, Catastrophic failure: engine locks up while driving

Fix: Rod bearings wear rapidly if oil change intervals exceed 5k miles or engine runs low on oil. Once knocking starts, damage is done—metal is already embedded in crank journals. In-chassis rebuild requires 16-20 hours: crank removal, machining .010 or .020 under, new bearings, piston inspection, reassembly. Most owners opt for used engine swap (6-8 hours) because machine work costs exceed junkyard engine prices.

Estimated cost: $2,000-3,500

Typical onset: 70,000-110,000 mi

Symptoms: Transmission fluid puddles under front of car, Rough shifting or slipping after fluid loss, Transmission overheating warning (if equipped), Visible rust on metal cooler lines at radiator connection

Fix: Steel cooler lines rust through where they connect to radiator, especially in salt states. Replacement requires draining trans fluid, disconnecting lines at trans and radiator, snaking new lines through chassis. Aftermarket line kits available but OE-style have better routing clips. 2-3 hours labor plus full fluid refill (4 quarts Hyundai SP-III or equivalent).

Estimated cost: $300-550

Typical onset: 60,000-90,000 mi

Symptoms: Squealing or grinding from front of engine, Coolant leak from water pump weep hole, Check engine light with cam/crank correlation codes, Visible belt wear or cracking on inside surface, Engine won't start after belt skip or break

Fix: This is an interference engine—belt failure means bent valves and likely head damage. Timing belt interval is 60k but many owners skip it. Hydraulic tensioner fails internally, allowing belt slack and potential skip. Always do water pump, tensioner, idler, and seals as kit. 4-5 hours labor, straightforward job. If belt already failed, add valve job or head replacement to the bill.

Estimated cost: $450-750

Typical onset: 80,000-120,000 mi

Symptoms: Loud clunk when shifting from Park to Drive or Reverse, Excessive engine movement visible when revving in Park, Vibration through shifter and center console, Drivetrain feels loose or sloppy during acceleration

Fix: Front transmission mount (also called roll restrictor) uses soft rubber that deteriorates, allowing drivetrain to rock excessively. Replacement requires supporting engine/trans from below, removing through-bolt, swapping mount. 1-1.5 hours. While there, inspect front and rear engine mounts—if one failed, others are close.

Estimated cost: $150-280

Typical onset: 60,000-100,000 mi

Symptoms: Hard starting, especially when hot, Stumbling or hesitation during acceleration, Loss of power on highway on-ramps, Check engine light with lean codes (P0171/P0174), Stalling at idle after long drives

Fix: Inline fuel filter under car near tank clogs with sediment, starving engine of fuel and straining pump. Filter is cheap but often overlooked—Hyundai spec is 30k replacement but nobody does it. 0.5 hour job: relieve fuel pressure, disconnect lines, swap filter. If filter wasn't changed and pump failed, expect both repairs: pump is in-tank requiring tank drop, 3-4 hours labor.

Estimated cost: $80-150