1997 SUBARU SVX

Typical onset: 80,000-150,000 mi

Symptoms: Slipping between gears, especially 2nd-3rd shift under load, Delayed engagement when shifting from Park to Drive, Shuddering or hesitation during acceleration, Transmission overheating, burnt ATF smell

Fix: The 4EAT behind the H6 was marginal from the factory. Duty solenoid C failures are common early warning signs (3-4 hours labor), but most end up needing full rebuild or replacement. Rebuild with upgraded clutch packs runs 12-18 hours labor. Used transmissions are scarce and risky. External oil cooler upgrades are mandatory preventive measure.

Estimated cost: $2,800-4,500

Typical onset: 100,000-150,000 mi

Symptoms: Oil seepage at head-to-block mating surface, visible on engine underside, Coolant weeping from head gasket areas (less common than oil), Slight oil burning smell after highway runs, No typical Subaru 2.5L combustion leak symptoms—mostly external seepage

Fix: The EG33 H6 suffers external head gasket leaks, not the catastrophic internal failures of 2.5L engines. Still requires engine removal or extreme contortion due to firewall clearance in the SVX chassis. Book time 16-20 hours for both sides. Must replace timing belt, water pump, all coolant hoses, and cam/crank seals while in there or you're doing it twice.

Estimated cost: $3,200-5,000

Typical onset: 60,000-120,000 mi

Symptoms: ATF puddles under vehicle, often toward front, Rapid ATF level drop between checks, Corroded or weeping hard lines running to front-mounted cooler, Transmission running hot due to low fluid

Fix: Steel cooler lines rust through where they pass the subframe and encounter road salt. Replacement lines are NLA from Subaru; most techs fabricate custom lines or adapt generic transmission cooler hose with proper fittings. 3-5 hours labor depending on rust severity and whether subframe needs dropping for access. Always add auxiliary cooler while you're in there.

Estimated cost: $400-800

Symptoms: Windows drop slowly or stop mid-travel, Glass sits crooked in door, wind noise at highway speed, Regulator motor runs but glass doesn't move, Plastic regulator track clips break, glass derails

Fix: The SVX's signature frameless side glass looks great but the regulators are weak and parts are unobtanium. Used regulators from salvage are the only real option. Expect 2-3 hours per door for R&R and alignment tweaking. Window felt and run channel weatherstrip also deteriorates, compounding issues.

Estimated cost: $350-650

Typical onset: 80,000-130,000 mi

Symptoms: Clunking over bumps from front end, Wandering or vague steering on-center, Uneven inner tire wear, Play detectable when prying on control arms with vehicle on lift

Fix: The SVX's curb weight (3,600+ lbs) accelerates front suspension wear. Lower ball joints are pressed into control arms; some techs replace entire arm assemblies due to parts scarcity. Bushings often need cutting out and pressing new ones in. Plan 4-6 hours for both sides including alignment. OE-spec parts are drying up, quality aftermarket is hit-or-miss.

Estimated cost: $800-1,400

Typical onset: 120,000+ mi

Symptoms: No-start condition, fuel pump doesn't prime on key-on, Intermittent stalling when tank below 1/4 full, Whining or buzzing from rear of vehicle, Rough running under load, lean codes

Fix: Pump access requires dropping the rear subframe and fuel tank, not a simple hatch drop-in. 3-4 hours labor. Fuel filter is also in-tank and often clogged by 20+ year-old sediment. Corroded filler neck and vent lines are common in rust-belt cars, requiring additional fabrication. Use OE or Walbro pump; cheap aftermarket units fail quickly.

Estimated cost: $600-1,100

Typical onset: 100,000-140,000 mi

Symptoms: Battery warning light on dash, dim headlights at idle, No-charge condition, battery drains overnight, Squealing serpentine belt, especially when cold or wet, Voltage gauge reading low (below 13.5V with engine running)

Fix: H6 alternator is buried low on passenger side of engine. Removal requires raising vehicle and working from below, removing splash shields. 2-3 hours labor. Automatic belt tensioner spring weakens over time, causing slippage and premature alternator bearing wear. Replace tensioner with alternator or chase this problem repeatedly.

Estimated cost: $500-850