1985 PONTIAC CATALINA

Typical onset: 80,000-150,000 mi

Symptoms: Blue smoke on startup and acceleration, Low oil level between changes, consuming 1+ quart per 500-1,000 miles, Fouled spark plugs in cylinders 2, 4, or 6, Loss of power and rough idle as rings wear

Fix: Requires engine rebuild or short block replacement. Pistons, rings, honing, and bearings if caught early; full crankshaft R&R if oil starvation damaged mains. Budget 18-24 labor hours for in-chassis rebuild, 12-16 for short block swap.

Estimated cost: $2,200-4,500

Typical onset: 60,000-120,000 mi

Symptoms: Transmission fluid leaking near radiator or under engine, Pink or red fluid pooling under front of car, Transmission slipping or delayed engagement after leak develops, Milky transmission fluid if cooler fails internally and coolant mixes in

Fix: Steel lines rust through at bends or radiator fittings. Replace cooler lines and fittings, inspect radiator-mounted cooler for internal failure. If coolant contaminated ATF, flush transmission and sometimes requires rebuild. 2-3 hours for lines only, 8-12 if trans needs flushing/rebuild due to coolant intrusion.

Estimated cost: $250-450 (lines only), $1,200-2,800 (if transmission damaged)

Typical onset: 70,000-140,000 mi

Symptoms: Clunk or thud when shifting from Park to Drive or Reverse, Vibration at idle in gear that disappears in Neutral, Visible sag of transmission tailshaft, especially passenger side, Driveline vibration at highway speeds

Fix: Rubber mount deteriorates from heat and age. Replace transmission mount and inspect crossmember for cracks. Simple job but requires lifting transmission slightly. 1.5-2 hours labor.

Estimated cost: $180-320

Typical onset: 100,000-180,000 mi

Symptoms: Rhythmic knocking that increases with RPM, loudest under load, Knock audible from engine valley, not valve train, Low oil pressure at idle (below 10 psi), Metallic debris in oil pan or filter

Fix: Usually from neglected oil changes or prolonged low-oil running. Requires engine teardown to replace rod bearings at minimum; often needs crankshaft machining if journals scored. 14-18 hours for in-chassis bearing replacement, more if crank needs grinding or block needs align-honing.

Estimated cost: $1,800-3,500

Symptoms: Hard starting when warm, floods easily when cold, Hesitation or stumble during acceleration, Stalling at idle or when coming to a stop, Raw fuel smell, black smoke from tailpipe

Fix: The computer-controlled E2SE carb has troublesome mixture control solenoid and choke pull-off diaphragms that fail. Rebuilds help temporarily, but ethanol fuel accelerates deterioration of rubber parts. Replace fuel filter first (common oversight), then rebuild or swap carb. 2-3 hours for rebuild, 4-5 if choke system needs rework.

Estimated cost: $320-650

Typical onset: 90,000-160,000 mi

Symptoms: Transmission won't lock into 4th gear overdrive, RPMs stay higher than normal at highway cruise (above 2,200 RPM at 60 mph), Shudder or chatter when lockup tries to engage around 45 mph, Check engine light with code 39 (TCC circuit fault)

Fix: Lockup clutch wears or solenoid fails. Often caught during fluid changes when metal shavings appear. Requires transmission removal and rebuild or torque converter replacement. 8-12 hours labor for R&R and internal work.

Estimated cost: $1,400-2,400