1998 BUICK REGAL

Typical onset: 60,000-120,000 mi

Symptoms: Coolant leaking externally into valley or internally into crankcase, White exhaust smoke on startup, Milky oil on dipstick or under oil cap, Overheating and rapid coolant loss, Engine misfire from coolant-fouled spark plugs

Fix: Replace lower intake manifold gaskets with updated Felpro 1250 or Dorman metal-carrier gaskets. Always replace upper intake gaskets, coolant, and inspect oil for contamination (change if milky). 4-6 hours labor depending on supercharger removal needs.

Estimated cost: $600-1,200

Typical onset: 80,000-150,000 mi

Symptoms: Transmission fluid puddles under vehicle, typically passenger side, Burnt smell from fluid dripping on exhaust, Low transmission fluid level causing slip or delayed engagement, Rusty, flaky cooler lines where they connect to radiator

Fix: Replace both steel transmission cooler lines that run along frame rail to radiator. Lines rust through at bends and connection points. Often need radiator removal for proper access. 3-5 hours labor, flush transmission after repair.

Estimated cost: $400-800

Typical onset: 100,000-180,000 mi

Symptoms: Coolant pushing out of reservoir or pressure cap, Overheating under boost or hard acceleration, White exhaust smoke, Bubbling in coolant reservoir with engine running, Oil contamination with coolant

Fix: Supercharged engines run higher cylinder pressures that stress head gaskets. Requires heads removed, resurfaced, and reinstalled with MLS gaskets and updated head bolts. Always address intake manifold gaskets simultaneously. 12-16 hours labor for proper job with machine work.

Estimated cost: $2,500-4,000

Typical onset: 90,000-140,000 mi

Symptoms: Harsh or delayed 1-2 shift, Engine flare or RPM spike during upshifts, Check Engine Light with P0741, P0742, or P1811 codes, Transmission slipping in 2nd or 3rd gear

Fix: Replace pressure control solenoid (PCS) and update to newer style. Sometimes requires valve body replacement if bore is worn. Drop pan, replace filter and fluid. 2-4 hours labor for solenoid only, 6-8 for valve body.

Estimated cost: $350-1,200

Typical onset: 100,000-160,000 mi

Symptoms: Whining or grinding noise from supercharger, Loss of boost and power, Rubber shavings in supercharger oil, Intermittent squeal on acceleration

Fix: Rubber coupler between supercharger and snout wears and disintegrates. Replace coupler, inspect snout bearing, and change supercharger oil. ZZP or Intense Racing upgraded couplers recommended. 2-3 hours labor.

Estimated cost: $250-500

Typical onset: 70,000-130,000 mi

Symptoms: Power steering fluid leak at inner tie rod boots, Clunking or play in steering when turning, Grease visible on inside of front wheels, Low power steering fluid level

Fix: Inner tie rod boots tear and allow rack to leak fluid, then fail from contamination. Often requires entire rack replacement because inner tie rods are staked on this generation. 3-4 hours labor plus alignment.

Estimated cost: $500-900

Typical onset: 80,000-140,000 mi

Symptoms: Clunk or thud when shifting from Park to Drive/Reverse, Excessive engine movement visible when revving, Vibration at idle in gear, Transmission hits frame on hard acceleration

Fix: Hydraulic transmission mount deteriorates and loses damping. Simple replacement job, access from underneath. 1-1.5 hours labor. Use OEM or quality aftermarket (Anchor, DEA).

Estimated cost: $150-300