1996 LINCOLN CONTINENTAL

Typical onset: 80,000-140,000 mi

Symptoms: heavy knocking from bottom end, severe oil consumption (quart per 500 miles), white/blue smoke on startup, loss of compression, metal shavings in oil, sudden loss of power

Fix: This engine has a notorious weak spot with piston skirt cracking and ring land failure, often taking out bearings when it grenades. Requires complete engine rebuild or replacement. Budget 25-35 labor hours for proper rebuild including machine work, or 18-22 hours for used engine swap. Many shops won't touch a rebuild on these—they'll push for a used engine.

Estimated cost: $4,500-7,500

Typical onset: 90,000-150,000 mi

Symptoms: milky/strawberry-colored transmission fluid, transmission slipping or delayed engagement, coolant level dropping without external leaks, transmission overheating, rough shifting

Fix: The internal transmission cooler in the radiator fails, allowing coolant and ATF to mix—game over for the 4R70W transmission. Requires radiator replacement, transmission rebuild or replacement, complete fluid system flush. This is a 12-18 hour job minimum if you're doing it right. Many techs will try external cooler bypass, but damage is usually already done.

Estimated cost: $3,000-5,500

Typical onset: 70,000-120,000 mi

Symptoms: rear end sagging overnight or after sitting, compressor runs constantly, suspension warning light, harsh ride quality, uneven ride height side-to-side

Fix: Air springs, compressor, and plastic air lines all fail with age. Compressor alone is 2-3 hours, air springs are 3-4 hours for the pair. Most owners eventually convert to coil spring conversion kit (4-6 hours) which is more reliable long-term but changes ride quality significantly.

Estimated cost: $800-2,200

Typical onset: 100,000-160,000 mi

Symptoms: coolant smell in cabin, steam from under hood, coolant loss with no visible external leak, overheating in traffic, coolant pooling on top of engine

Fix: Plastic coolant crossover tube on the intake manifold cracks due to heat cycling. Access requires removing upper intake—it's buried. Figure 4-6 hours for removal, replacement, and proper bleeding. Part is cheap but labor adds up due to cramped engine bay.

Estimated cost: $600-1,200

Typical onset: 60,000-100,000 mi

Symptoms: heavy clunk when shifting into drive or reverse, vibration at idle in gear, excessive drivetrain movement felt through chassis, transmission appears to sag when viewed from below

Fix: The hydraulic transmission mount fails, allowing excessive movement. Replacement is straightforward—2-3 hours with proper transmission support. This is preventive maintenance that can save your transmission if caught early, but most owners ignore it until other problems appear.

Estimated cost: $350-600

Typical onset: 100,000-150,000 mi

Symptoms: white smoke from exhaust, coolant in oil (milky dipstick), overheating, loss of coolant with no visible leak, rough idle, misfires on multiple cylinders

Fix: The DOHC 4.6L can blow head gaskets, often on both banks simultaneously. This is a 16-22 hour job—expensive on a DOHC with four cams. Requires heads to be checked for flatness and possibly machined. If caught early before overheating damage, it's just gaskets. If you cooked it, you're looking at valve damage and possibly the full engine failure scenario above.

Estimated cost: $2,800-4,500