2006 NISSAN FAIRLADY Z

Typical onset: 80,000-130,000 mi

Symptoms: Blue smoke on startup or deceleration, Low oil pressure warning at idle when hot, Excessive oil consumption (1 qt per 1,000 mi or worse), Ticking/knocking from upper engine, especially cold

Fix: Oil gallery gasket leaks internally, starving cam bearings and causing piston ring land damage from detonation. Repair requires engine-out cylinder head removal, new gallery gaskets, timing components, and often piston ring replacement if caught late. 18-24 labor hours for heads-on service, 30+ for full rebuild if bearings are damaged.

Estimated cost: $3,500-7,000

Typical onset: 100,000-150,000 mi

Symptoms: Rattling/whining from front of engine on cold start, subsides after 10-20 seconds, Metallic scraping noise at idle, Check engine light with cam/crank correlation codes (P0335, P0340)

Fix: VQ35DE plastic timing chain guides crack and tensioners lose pressure. If guides break, chain can jump and cause valve-to-piston contact. Prevention requires timing cover removal, all three chains, guides, tensioners, and front main seal. 12-16 labor hours. Do NOT defer this once noise starts.

Estimated cost: $2,200-3,500

Typical onset: 60,000-100,000 mi

Symptoms: Transmission slipping or delayed engagement, Milky/strawberry-colored transmission fluid, Overheating on highway drives or spirited use, Complete transmission failure after cooler breach

Fix: Factory cooler is undersized and fails internally, mixing coolant with ATF and destroying clutch packs. Requires transmission rebuild or replacement PLUS external auxiliary cooler install and all cooling system/ATF flush. If caught early (just cooler), 4-6 hours. If trans is contaminated, add 18-22 hours for rebuild.

Estimated cost: $1,200-5,500

Typical onset: 90,000-140,000 mi

Symptoms: Loud ticking/tapping from valve covers, worse when cold, Rough idle and misfires under load, P0300-series misfire codes, Loss of power in upper RPM range

Fix: Hydraulic lifters collapse due to oil starvation (see gallery gasket issue). Often accompanies cam lobe wear. Requires cylinder head removal, lifter replacement, and cam inspection/replacement if lobes are scored. 14-18 labor hours per bank if cams are reusable, more if machining needed.

Estimated cost: $2,800-4,500

Typical onset: 70,000-110,000 mi

Symptoms: Clunking on hard acceleration or deceleration, Vibration through chassis at highway speeds, Excessive shifter movement (manual) or lever play (auto), Grinding/binding feel during shifts

Fix: Rubber transmission mount deteriorates, allowing excessive driveline movement. Also check driveshaft center support bearing. Mount replacement is straightforward: 2-3 labor hours. If center bearing is involved, add 1-2 hours.

Estimated cost: $400-800

Symptoms: Hard starting or no-start when tank is below 1/4, Surging or hesitation under load, Lean codes (P0171/P0174) despite no vacuum leaks, Fuel pump whine audible in cabin

Fix: In-tank fuel filter (part of pump assembly) clogs from sediment, especially if car sat or used poor-quality fuel. Requires fuel pump module removal, filter replacement or full pump assembly. 3-4 labor hours. If pump is damaged from running dry, full assembly replacement needed.

Estimated cost: $600-1,200