1991 MAZDA B2200

Typical onset: 120,000-180,000 mi

Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Milky oil on dipstick or cap, Overheating under load, Rough idle or misfiring

Fix: F2 engines overheat easily when cooling systems are neglected—original radiators clog, thermostats stick, and water pumps fail. Once overheated, head gaskets blow and can warp the aluminum head. Repair requires head removal, resurfacing (typically 0.010-0.015" warp), new gasket set, timing belt, and all cooling components. Budget 12-16 hours labor for proper job including machine work.

Estimated cost: $1,200-2,200

Typical onset: 80,000-150,000 mi

Symptoms: Transmission fluid leaking near radiator, Pink fluid dripping under front of truck, Transmission slipping or delayed engagement, Milky transmission fluid (coolant contamination)

Fix: Steel oil cooler lines rust through where they connect to the radiator, or the internal radiator cooler fails and mixes coolant with ATF. If coolant enters transmission, it destroys clutches and requires full rebuild or replacement. Catch it early: replace lines and external cooler (2-3 hours). If contaminated: flush immediately, or budget transmission rebuild at 8-12 hours plus R4 or R4A parts.

Estimated cost: $150-400 (lines only), $1,800-3,200 (if transmission damaged)

Typical onset: 180,000-250,000 mi

Symptoms: Blue smoke on startup or acceleration, Burning 1 quart per 500-800 miles, Fouled spark plugs, Loss of compression, Carbon buildup on valves

Fix: High-mileage F2 engines develop ring wear, especially if oil changes were stretched. Compression test shows 120-140 psi or lower with wet test confirming rings. In-frame ring job requires 10-14 hours: pistons out, ridge reaming, honing, new rings and bearings. Many opt for reman short block instead (8-10 hours swap) given engine age and unknown crank/cylinder wear.

Estimated cost: $1,400-2,000 (rings), $2,200-3,500 (short block)

Symptoms: Hard starting when hot, Stalling after warm-up, Hesitation or surging at highway speed, Long crank times, Fuel pump cycling audibly

Fix: These trucks sit for extended periods now, and old fuel varnishes the in-tank sock filter and inline filter. Fuel pumps are still available but pricey. Replace fuel filter first (0.5 hour), then drop tank to clean sock and inspect pump if problem persists (2.5-3.5 hours total). Ethanol fuel accelerates varnish buildup—run fuel stabilizer if stored seasonally.

Estimated cost: $80-150 (filter service), $450-700 (pump replacement)

Typical onset: 100,000-160,000 mi

Symptoms: Clunking when shifting into drive or reverse, Vibration at idle in gear, Excessive drivetrain movement visible under acceleration, Shifter feels loose or notchy

Fix: Rubber transmission mount deteriorates and allows excessive movement, especially on automatics. Creates harsh engagement and can stress shift linkage. Replacement is straightforward: support transmission, unbolt old mount, install new (1.0-1.5 hours). Inspect engine mounts at same time as they often fail simultaneously.

Estimated cost: $120-220

Typical onset: 150,000-220,000 mi

Symptoms: Knocking noise that increases with RPM, Low oil pressure at idle (under 10 psi), Metallic rattling on cold start, Metal shavings in oil or filter

Fix: Neglected oil changes or running low on oil starves rod bearings on the F2. Once knocking starts, damage is done—bearings are scored, crank may be undersized, and rod journals need grinding. Full teardown required: if crank is salvageable, bearing replacement with possible 0.010" undersize takes 14-18 hours. Most engines at this stage get short block or used engine swap instead given age and parts availability.

Estimated cost: $2,500-4,000 (rebuild), $1,800-2,800 (used engine swap)