1990 BUICK REGAL

Typical onset: 80,000-140,000 mi

Symptoms: White smoke from exhaust, sweet coolant smell, Rapid coolant loss with no external leaks, Milky oil on dipstick or oil cap, Severe overheating leading to warped heads or cracked block, Knocking or bearing noise after coolant contamination

Fix: The plastic intake manifold gaskets fail, dumping coolant into the crankcase. If caught early (gasket replacement 6-8 hours), you survive with $800-1,200. Most owners miss it and destroy bearings, requiring complete engine rebuild or replacement (25-35 hours labor). Short block swaps common.

Estimated cost: $2,800-5,500

Typical onset: 70,000-120,000 mi

Symptoms: Pink or strawberry milkshake appearance in coolant reservoir, Transmission slipping or delayed engagement, Transmission overheating, Coolant in transmission pan during service

Fix: Steel cooler lines rust through where they pass the subframe, or the cooler inside the radiator fails. ATF and coolant mix, destroying the transmission. Requires radiator replacement, new cooler lines, transmission flush or rebuild (if damaged), 8-15 hours depending on transmission condition. Many shops recommend external transmission cooler retrofit.

Estimated cost: $1,200-3,800

Typical onset: 60,000-100,000 mi

Symptoms: Slow coolant loss, topping off every 2-4 weeks, Coolant smell from engine bay, no visible leak, Slight rough idle when cold, Clean engine externally but low coolant level

Fix: The early warning of the catastrophic failure above. Gaskets weep externally or internally. Replacement requires intake removal, new gaskets, coolant flush, 6-8 hours labor. Use updated Fel-Pro composite gaskets, not OEM plastic. Ignore this and you're buying an engine.

Estimated cost: $650-1,100

Typical onset: 80,000-130,000 mi

Symptoms: Severe clunk when shifting from Park to Drive or Reverse, Vibration at idle in gear, Visible engine/trans movement when accelerating hard, Shifter linkage feels loose or imprecise

Fix: Hydraulic transmission mount fails, allowing excessive drivetrain movement. The mount itself is cheap but access requires subframe support and partial exhaust removal in some cases, 2.5-4 hours labor. Often discovered during other work.

Estimated cost: $280-550

Typical onset: 90,000-150,000 mi

Symptoms: No-start condition, cranks but won't fire, Stalling at operating temperature or under load, Whining noise from rear of car, Hard starting when fuel tank below 1/4

Fix: In-tank pump quits, usually the motor itself. Requires dropping the fuel tank, 3-4 hours labor. Replace fuel filter and strainer sock at same time. Common enough that experienced owners carry a spare pump.

Estimated cost: $450-750

Symptoms: Center high-mount brake light inoperative, Bulb replacement doesn't fix issue, Moisture visible in light housing

Fix: Circuit board in the CHMSL assembly corrodes (subject of recall). Housing seals fail, water intrusion kills the board. Replacement assembly required, 0.5 hours labor. Safety issue for rear-end collision risk, inexpensive fix.

Estimated cost: $80-150

Symptoms: Seat belt won't retract fully, Belt webbing fraying at shoulder height, Retractor mechanism binding or seized, Belt won't latch properly

Fix: Multiple recalls addressed seat belt failures on this generation. Retractors seize or webbing deteriorates. Replacement belt assemblies required, 1-2 hours per side. Verify recall completion before purchase; some owners never got them done.

Estimated cost: $200-400