1986 Mercury Topaz Service and Repair Manual

This factory service and repair manual for the 1986 Mercury Topaz keeps a diesel and a gasoline engine under the same cover: the 2.0-liter SOHC inline-four of 122 cubic inches burning diesel, and the 2.3-liter OHV inline-four of 140 cubic inches burning gasoline, neither of them force-fed. Both go into the same two-door and four-door sedan bodies and the same Base, GS and LS trims, so the technician's first job is identification and the second is turning to the right set of fuel, compression and emissions specifications.

Engines covered

• 2.0L inline-four (122 cu in) — SOHC, naturally aspirated, diesel
• 2.3L inline-four (140 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 2-door sedan
• 4-door sedan

Trims covered

• Base
• GS
• LS

Known issues on the 1986 Topaz. One recall stands against this year, and it comes from the parts shelf rather than the assembly line: replacement fuel pumps whose diaphragms were poorly installed or inadequately tested can leak, and leaking fuel near a hot engine is a fire hazard. Owner complaints total 13, split between the electrical system with 3, engine and cooling with 3 and service brakes with 2. Fuel delivery, charging and lighting circuits, cooling system service and brake hydraulics all have their own procedures, specifications and torque values in this manual.