1987 PONTIAC SUNBIRD

Typical onset: 80,000-130,000 mi

Symptoms: Blue smoke on startup or acceleration, Excessive oil consumption (quart per 500-800 miles), Loss of compression, Fouled spark plugs, Poor cold starts

Fix: Piston rings wear prematurely on both 1.8L and 2.0L turbo engines due to heat stress and inadequate oil cooling. Full tear-down required: remove engine, disassemble short block, hone cylinders, install oversized rings and pistons if cylinder wear exceeds spec. Budget 18-24 hours labor for complete ring job. If main bearings show scoring, add another 4-6 hours and $200-400 in bearing sets.

Estimated cost: $2,200-3,800

Typical onset: 100,000-150,000 mi

Symptoms: Heavy knocking from lower engine, Metal shavings in oil, Low oil pressure at idle, Sudden seizure in extreme cases

Fix: The turbo I4s had marginal oiling systems under boost. Oil starvation causes main bearing wear, then crank journal damage. Requires full engine removal (8-10 hours), crankshaft R&R with machine shop work to grind journals undersize (add $300-500 shop time), new bearings, and reassembly. Often discovered during ring jobs—if crank shows more than 0.002-inch taper, it needs grinding.

Estimated cost: $3,200-5,000

Typical onset: 60,000-90,000 mi

Symptoms: Clunking when shifting from park to drive, Excessive engine movement visible from engine bay, Vibration at idle, Difficulty engaging gears

Fix: The rubber transmission mount deteriorates and separates, allowing the engine/trans assembly to shift excessively. The mount is wedged between the trans and subframe—requires lifting engine slightly to access. 1.5-2.5 hours labor. Not difficult, just awkward on a lift. Replace both transmission mount and lower engine mount simultaneously—they fail together.

Estimated cost: $180-350

Typical onset: 70,000-110,000 mi

Symptoms: Transmission fluid pooling under car, Pink fluid dripping near radiator, Burnt transmission smell, Slipping when hot

Fix: Steel cooler lines rust through where they attach to the radiator or at the crimp fittings near the trans. Lines are cheap ($40-80), but access is tight—figure 2-3 hours to drop lines, flush any debris, and refill transmission. If cooler leaked long enough to starve the trans, you're looking at a rebuild. Always replace both lines and flush the external cooler.

Estimated cost: $220-400

Typical onset: 90,000-140,000 mi

Symptoms: Turbo whine turns to grinding, Loss of boost pressure, Blue smoke under boost, Turbo lag or complete loss of spool

Fix: The small-diameter oil feed line to the turbo clogs with sludge if oil changes were delayed. Starved turbo destroys its bearings within minutes. Requires new or rebuilt turbo ($400-800), new feed and drain lines, and oil system flush. 6-8 hours labor due to exhaust manifold removal on these cramped engine bays. Preventable with religious 3,000-mile oil changes.

Estimated cost: $1,100-1,900

Symptoms: Hesitation under acceleration, Stalling in hot weather, Hard starting after sitting, Surging at highway speed

Fix: The inline fuel filter clogs from tank rust and old fuel varnish—common on cars that sit. Filter is along the frame rail, easy access. 0.5 hours labor, $15-25 part. Do this every 30,000 miles or when buying a used example. If the filter is packed solid, drop the tank and inspect the sock filter on the pump.

Estimated cost: $40-80

Typical onset: 110,000-160,000 mi

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

Fix: The naturally aspirated 2.0L OHV engine can blow head gaskets between cylinders 2 and 3. Requires head removal, surface milling if warped (common), new gasket set, and timing belt. 8-10 hours labor. Check for cracks while the head is off—these castings are brittle. Turbo engines fail internally before the gasket usually gives up.

Estimated cost: $800-1,400