2008 PONTIAC MONTANA

Typical onset: 60,000-120,000 mi

Symptoms: White smoke from exhaust on cold starts, Persistent coolant loss with no visible leaks, Rough idle or misfire codes, Milky oil on dipstick in severe cases

Fix: Replace upper and lower intake manifold gaskets; often discover warped intake requiring machining or replacement. Flush cooling system and change oil. 6-9 hours labor depending on accessibility and intake condition.

Estimated cost: $1,200-2,200

Typical onset: 80,000-140,000 mi

Symptoms: Pink or strawberry milkshake-colored fluid in radiator, Transmission slipping or delayed engagement, Transmission fluid appears foamy, Overheating transmission

Fix: When cooler lines corrode internally, coolant mixes with ATF destroying the transmission. Requires new radiator (internal cooler), complete transmission flush or rebuild, and all cooler lines. If caught early (just lines), 3-4 hours. If trans is damaged, add 12-18 hours for rebuild.

Estimated cost: $800-1,200 (lines/radiator only), $2,800-4,500 (with transmission rebuild)

Typical onset: 100,000-180,000 mi

Symptoms: Deep knocking sound from engine bottom end, Metal shavings in oil, Low oil pressure warning, Catastrophic failure with sudden loss of power

Fix: Rod and main bearings wear prematurely, often traced to oil sludge from intake gasket coolant contamination or poor maintenance. Requires complete teardown: main bearings, rod bearings, often crankshaft machining, and sometimes pistons/rings if cylinder walls scored. 18-24 hours labor, or short-block replacement at 14-16 hours.

Estimated cost: $3,500-5,500 (rebuild), $4,000-6,000 (short block swap)

Typical onset: 70,000-130,000 mi

Symptoms: Severe clunking when shifting from Park to Drive, Excessive engine movement visible from driver's seat, Vibration at idle in gear, Difficulty shifting smoothly

Fix: The rear transmission mount rubber deteriorates and the mount collapses, allowing drivetrain to move excessively. Replacement is straightforward but requires supporting the transmission. 1.5-2.5 hours labor.

Estimated cost: $250-450

Typical onset: 90,000-150,000 mi

Symptoms: Power steering fluid puddles under vehicle, Groaning noise when turning at low speeds, Stiff steering especially when cold, Burning smell from fluid on hot exhaust

Fix: High-pressure hose from pump to rack develops leaks at crimp connections. Hose sits near exhaust, accelerating deterioration. Replace pressure hose and top off fluid, bleed system. 1.5-2 hours labor.

Estimated cost: $280-480

Typical onset: 80,000-140,000 mi

Symptoms: Clunking from rear over bumps, Rear end feels loose or wandering, Uneven rear tire wear, Vehicle tracks crooked after hitting bumps

Fix: Trailing arm bushings crack and separate, allowing excessive rear axle movement. Requires pressing out old bushings and installing new ones, often need alignment afterward. 3-4 hours labor for both sides.

Estimated cost: $450-750

Typical onset: 120,000-180,000 mi

Symptoms: No-start condition with cranking but no fuel pressure, Intermittent stalling especially when hot, Whining noise from fuel tank, Loss of power under acceleration

Fix: Fuel pump assembly wears out, requiring dropping the fuel tank for access. Replace entire pump module including strainer. 2.5-3.5 hours labor.

Estimated cost: $550-850