1982 Mercury Grand Marquis Service and Repair Manual

This factory service and repair manual for the 1982 Mercury Grand Marquis covers a car that reached buyers in three shapes — a two-door sedan, a four-door sedan and a four-door wagon — under two trim names, Base and Colony Park. Two pushrod V8s were on offer: a 4.2L of 255 cubic inches and a 5.0L of 302, both naturally aspirated and fed gasoline. Ignition timing, valve train clearances and cooling figures differ between those two displacements, and the specifications and torque values are given for each rather than averaged into one set.

Engines covered

• 4.2L V8 (255 cu in) — OHV, naturally aspirated, gasoline
• 5.0L V8 (302 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 2-door sedan
• 4-door sedan
• 4-door wagon

Trims covered

• Base
• Colony Park

Known issues on the 1982 Grand Marquis. One recall sits on the federal record, and it reaches the car through the parts bin rather than the assembly line: replacement fuel pumps whose diaphragms were poorly installed or inadequately tested, letting gasoline seep out and raising the risk of a fire. Owners have logged 8 complaints, five of them against the engine and cooling system and one each against the exterior lighting and the fuel system. Fuel delivery testing, pump and line replacement, cooling system procedures and lamp circuit diagnostics all appear here with their specifications.