1994 NISSAN PULSAR

Typical onset: 80,000-140,000 mi

Symptoms: White smoke from exhaust, especially on cold start, Coolant loss with no visible leaks, Overheating under boost, Milky oil or oil in coolant reservoir

Fix: SR20DET heads warp when overheated or detonated hard. Requires head removal (4-5 hrs), resurfacing at machine shop, ARP studs recommended, new gasket and timing chain components while open. Many shops find worn valve stem seals and lifters once head is off, adding cost. Total 12-16 hrs labor if doing it right.

Estimated cost: $2,200-3,800

Typical onset: 100,000-150,000 mi

Symptoms: Excessive blue smoke under boost, Loud whining or grinding from turbo, Loss of boost pressure above 3,000 rpm, Oil consumption over 1 qt per 1,000 mi

Fix: Factory TD04 or aftermarket turbos fail from oil starvation (coked feed lines) or shaft play from age. Oil restrictor delete and running non-synthetic oil worsen it. Turbo R&R is 6-8 hrs due to tight engine bay; always replace oil feed/return lines, oil change immediately after. Rebuilt OEM-spec units are scarce; expect aftermarket.

Estimated cost: $1,400-2,600

Typical onset: 70,000-120,000 mi

Symptoms: ATF puddles under front of car, Transmission slipping or delayed engagement, Burnt ATF smell, Pink milky fluid if cooler leaks into radiator

Fix: Hard steel lines and rubber hoses crack from heat cycling. If cooler inside radiator fails, ATF mixes with coolant and destroys transmission in days. Replace all cooler lines and external cooler assembly (3-4 hrs), flush transmission completely. If contaminated, transmission rebuild needed (add 10-14 hrs).

Estimated cost: $600-1,200 (lines only); $2,800-4,200 (if trans rebuild needed)

Typical onset: 90,000-160,000 mi

Symptoms: Loud ticking from valve cover at idle, worse when cold, Ticking increases with RPM, Loss of top-end power, Check engine light with misfire codes

Fix: SR20DET hydraulic lifters collapse from age or sludge buildup; camshaft lobes wear if oil changes skipped. Valve cover off to inspect (1 hr); if multiple lifters bad, pull head for cam inspection (8-12 hrs total). Often find rocker arm wear too. All 16 lifters plus cam if needed.

Estimated cost: $800-1,400 (lifters only); $1,800-3,200 (cam + lifters)

Typical onset: 100,000-180,000 mi

Symptoms: Visible wobble of crank pulley at idle, Squealing from serpentine belt area, Vibration felt through whole car at 2,000-3,000 rpm, Timing marks no longer align

Fix: Rubber ring delaminates between pulley and hub, causing catastrophic timing chain damage if it comes apart. Replacement is 2-3 hrs (drop motor mount, remove accessories), but OEM parts are NLA — aftermarket units mandatory. Do not drive if wobbling.

Estimated cost: $450-750

Typical onset: 60,000-110,000 mi

Symptoms: Clunking when shifting or launching, Vibration through shifter at highway speed, Visible sag of transmission/transfer case, Drivetrain lash when rolling on/off throttle

Fix: AWD system adds weight; rubber mounts tear and collapse, especially transmission mount and transfer case mount. Requires lift and support of drivetrain to replace (3-4 hrs for all mounts). Polyurethane upgrades available but increase NVH.

Estimated cost: $500-850