1993 VOLVO 240

Typical onset: 150,000-250,000 mi

Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Rough idle or misfires, Milky oil on dipstick or cap, Overheating gauge readings

Fix: The B230F redblock overheats due to failed radiators, water pumps, or clogged systems—then blows head gaskets. Neglect leads to warped heads or cracked blocks requiring full rebuilds. Head gasket job alone is 8-10 hours; full engine rebuild with pistons, rings, bearings, and machine work runs 25-35 hours plus parts.

Estimated cost: $1,200-2,500 for head gasket; $4,000-7,000 for full rebuild

Typical onset: 120,000-200,000 mi

Symptoms: ATF leaking from radiator area or lines, Transmission slipping or delayed engagement, Burnt transmission fluid smell, Overheating transmission, Sudden loss of all gears

Fix: The AW70/71 transmission relies on rubber cooler lines and an in-radiator cooler that rot out. Leak starves the trans of fluid, burning clutches and destroying internals. Cooler line replacement is 1.5-2 hours; if trans is damaged, rebuild or replacement adds 12-16 hours. Preventive replacement of lines and external cooler installation saves transmissions.

Estimated cost: $150-300 for lines only; $1,800-3,200 for transmission rebuild if damaged

Typical onset: 100,000-180,000 mi

Symptoms: Excessive vibration at idle, Clunking when shifting into gear, Engine rocks visibly when revved, Loud banging over bumps, Shifter vibration

Fix: Rubber mounts age out and collapse, especially the rear transmission mount. Creates harsh NVH and can stress drivetrain components. Transmission mount replacement is 1.5-2 hours; full set of engine and trans mounts is 3-4 hours. Inexpensive fix with big quality-of-life improvement.

Estimated cost: $250-500 for all mounts

Symptoms: Hard starting, especially when hot, Stumbling or hesitation under load, Stalling at idle, Loss of power at highway speeds, Rough running

Fix: The in-line fuel filter clogs with age and rust from old tanks. Bosch K-Jetronic fuel injection is sensitive to pressure drops. Filter replacement is 0.5 hours but often neglected. Should be changed every 30,000 miles or 3 years on these cars.

Estimated cost: $80-150

Typical onset: 80,000-150,000 mi

Symptoms: Oil leaking from valve cover, rear main, or dipstick, Rough idle, High crankcase pressure, Oil dipstick popping out, Blue smoke from oil burning

Fix: The flame trap (oil separator box) under the intake manifold clogs with sludge, pressurizing the crankcase and blowing out every seal. Often misdiagnosed as multiple leak sources. Requires intake removal; 2-3 hours labor. Replace with updated green version and do valve cover gasket while there.

Estimated cost: $300-600

Typical onset: 120,000-200,000 mi

Symptoms: Clunking over bumps, Wandering steering, Uneven tire wear, Steering wheel vibration, Poor handling and body roll

Fix: Control arm bushings, strut mounts, and torque rod bushings deteriorate. The front strut thrust bearing is a known wear point causing clunking. Full front suspension refresh with bushings and mounts is 6-8 hours. Dramatically improves handling on these heavy sedans.

Estimated cost: $800-1,400