2004 VOLVO C70 spark plugs

Spark plugs
The spark plugs should be replaced every 60,000 miles (96,000 km) under normal driving conditions. City driving or
fast highway driving may necessitate replacement sooner.
Under normal driving conditions, spark plugs require no maintenance between replacement intervals. When installing
new plugs, be sure to use the right type and to tighten them correctly. When changing the plugs, clean the terminals
and rubber seals. Also check that the suppressor connectors are in good condition. Cracked or damaged connectors
should be replaced.
pg. 114 Fuel/emissions systems
Fuel system
The fuel system is all-electronic and is microprocessor-controlled. It can continually compensate for variation in
engine load, speed and temperature to give the best economy and power. A mass air flow sensor measures the inducted
air. In this way the system can make instantaneous adjustments for changes in air temperature or density, thus always
assuring the best economy with the lowest possible exhaust emissions.
Heated oxygen sensor(s)
This is an emission control system designed to reduce emissions and improve fuel economy. The heated oxygen sensor
monitors the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed into an electronic
module. This adjusts the air-fuel ratio to provide optimum conditions for combustion and efficient reduction of the
three major pollutants (hydrocarbons, carbon monoxide and oxides of nitrogen (NOx)) by a three-ways catalytic
converter.
Crankcase ventilation
Crankcase ventilation
The engine is provided with positive crankcase ventilation which prevents crankcase gases from being released into the
atmosphere. Instead, the crankcase gases are admitted to the intake manifold and cylinders.
Evaporative control system
The car is equipped with an evaporative control system which prevents gasoline vapor from being released into the
atmosphere.
The system consists of a fuel tank with filler pipe and cap, a rollover valve, a Fill Limit Vent Valve (FLVV), vapor
vent lines, a charcoal canister, a purge line, a purge control valve and engine connections.
In addition, there is a pressure sensor connected to the fuel tank and a filter -protected Canister Close Valve (CCV) on
ProCarManuals.com

Cooling system
Type: Positive pressure, closed system
Thermostat begins to open at 180° F (87° C)
Coolant: Volvo original coolant/antifreeze
Capacity: 7.4 US qts. (7.0 liters)
Fuel system
The engine is equipped with a multiport fuel injection system.
Distributor ignition system
Firing order: 1-2-4-5-3
Distributor ignition setting: Not adjustable
Spark plugs: Champion RC87PYP (or equivalent)
Spark plug gap: 0.03" (0.75 mm)
Tightening torque: 18.4 ft. lbs. +/- 3.7 ft. lbs. (25 Nm +/- 5 Nm)WARNING!
The distributor ignition system operates at very high voltages. Special safety precautions must be followed to
prevent injury. Always turn the ignition off when:
Replacing distributor ignition components e.g. plugs, coil, etc.
Do not touch any part of the distributor ignition system while the engine is running. This may result in unintended
movements and body injury.
All specifications are subject to change without notice.
Front suspension
Spring strut suspension with integrated shock absorbers and control arms linked to the support frame. Power-assisted
rack and pinion steering. Safety type steering column.
The alignment specifications apply to an unladen car but include fuel, coolant and spare wheel.
Toe-in measured on the wheel rims: 2.4 mm +/- 0.7 mm
Toe-in measured on tire sides: 2.9 +/- 0.9 mm
Rear suspension
Delta-link individual rear wheel suspension with longitudinal support arms, double link arms and track rods.
Toe-in measured on the tire sides: 4° +/- 10°
ProCarManuals.com

Spare tire (sedan)56
Spark plugs113, 128
Speakers (rear seat) - turning on/off36
Specifications125
SRS5,6,7
SRS diagnostic system19
SRS warning light5,17, 19
Stability and Traction Control (STC)19, 23, 75
Start inhibitor (immobilizer)43
Starting the engine64
Steering wheel adjustment32
Steering wheel lock21
Storage compartments42
Studded tires81
T
Tachometer16
Temperature gauge16
Temporary spare tire88
Three-way catalytic converter123
Timing belt113
Tire pressure82
Tire rotation82
Tires - changing86
Towing71, 72
Towing a trailer76
Towing the car72
Trailer towing76
Trip computer23, 26, 27, 28
Trip odometer16
Trunk - opening from the inside55
Trunk - opening/locking55
Trunk light56
Turn signals17,20
U
Uniform tire quality grading83
Upholstery - cleaning108
V
Vanity mirrors52
Vehicle Identification Number (VIN)110
Vehicle loading129
Volvo On Call133
W
Warning flashers23
Warning lights18, 19
ProCarManuals.com