1998 SUBARU LEGACY

Typical onset: 80,000-150,000 mi

Symptoms: Oil seepage or coolant weeping at cylinder head mating surface, visible as crusty buildup on block sides, Low coolant level without visible external leaks elsewhere, Oil mixed with coolant in overflow tank (severe cases), White exhaust smoke on cold start if coolant reaches combustion chamber

Fix: Both heads must come off. Requires head resurfacing, new MLS gaskets, timing belt/water pump/tensioners while you're in there, valve cover gaskets, and all coolant hoses. Book time 12-16 hours for a careful job including head prep at machine shop.

Estimated cost: $2,200-3,500

Typical onset: 120,000-180,000 mi

Symptoms: Coolant consumption with no visible external leak and no white smoke, Milky oil or oil mixed into coolant overflow, Overheating that returns shortly after topping off coolant, Bubbles in coolant reservoir when running

Fix: This is a casting defect where coolant migrates through porous cylinder wall into oil passages. No gasket fix works. Requires used or remanufactured shortblock. Labor 14-18 hours includes pulling engine, swapping all accessories, timing components, reseal everything.

Estimated cost: $3,500-5,000

Typical onset: 100,000-180,000 mi

Symptoms: Harsh or delayed 2-3 upshift, especially when cold, Check engine light with codes P0743 or P0748, Transmission hangs in gear or won't shift smoothly under light throttle, ATF that smells burnt or is dark brown instead of red

Fix: Solenoid is internal, requires transmission pan removal and valve body drop. If fluid has been neglected, internal clutch damage is likely and full rebuild becomes necessary. Solenoid replacement alone: 3-4 hours. Rebuild: 12-16 hours.

Estimated cost: $600-1,200 solenoid only; $2,500-3,800 full rebuild

Symptoms: ATF dripping or spraying from lines near radiator, especially after winter salt exposure, Sudden total ATF loss leading to transmission slip or no movement, Visible rust perforation on steel hard lines running to radiator

Fix: Steel lines rust through at bends and mounting points. Replacement requires new OEM or aftermarket lines, sometimes radiator removal for access. 2-4 hours labor depending on line routing. Flush system and check for metal contamination if failure was sudden.

Estimated cost: $400-800

Typical onset: 100,000-160,000 mi

Symptoms: Grinding or whining noise from alternator pulley area, worse with electrical load, Battery light flickers or stays on at idle, Voltage drops below 13.5V with lights and accessories on, Serpentine belt wear or tracking issues from wobbling pulley

Fix: Alternator is accessible from top on 2.2L, requires AC compressor removal on 2.5L for clearance. Remanufactured unit recommended over rebuild. 1.5-2.5 hours depending on engine.

Estimated cost: $400-650

Symptoms: Sudden clunking noise from front suspension, vehicle sits noticeably lower on one side, Broken spring end visible protruding through dust boot or poking toward tire, Vehicle pulls to side of broken spring under braking, Tire wear on inside edge from sudden camber change

Fix: NHTSA recall 98V176000 addressed this but many weren't repaired. Spring replacement requires strut removal. Replace both sides and do alignment. 2.5-3.5 hours labor.

Estimated cost: $500-850

Typical onset: 80,000-150,000 mi

Symptoms: No-start that resolves after sitting 10-30 minutes, Stalling when hot, especially in traffic or after highway driving, Tachometer drops to zero while driving, engine cuts out briefly then recovers, Check engine light with P0335 or P0340 codes

Fix: Sensor located on front of engine block below intake manifold. Requires removing air intake and working from top or jacking engine slightly. Connector corrosion common—clean and dielectric grease before condemning sensor. 1-1.5 hours.

Estimated cost: $250-400