Exhaust System Maintenance; Exhaust Manifold Heat Valve; Tune-Up Specifications - On-Vehicle - Jeep 1979 CJ-5 Technical & Service Manual

Table of Contents

GENERAL SERVICE AND DIAGNOSIS

Inspect the fuel and vent lines for leakage or damage.

Repair or replace as required. Be sure all connections

If liquid fuel is present at the fuel vapor storage

canister, inspect the liquid check valve and replace if

Charcoal Canister Filter

The filter pad located at the bottom of the canister is

the only serviceable item of the canister assembly. Re-

place at the intervals described in the Maintenance

Schedule, located in Chapter B of this manual.

Thermostatically Controlled Air Cleaner (TAG) System

Inspect valve for proper operation. If necessary, refer

to Chapter 1J—Fuel Systems for functional test.

Inspect hoses for cracks and brittleness. Replace as

EXHAUST SYSTEM

Air Guard System

Inspect hoses for defects. Replace as necessary.

Exhaust Manifold Heat Vglve

The exhaust manifold heat valve is an often over-

looked, but highly important, emission related com-

ponent. This valve can affect the gas mileage,

performance, driveability and emission levels.

Inspect the exhaust manifold heat valve for correct

operation and lubricate with Jeep Heat Valve Lubricant,

or equivalent. Refer to Chapter IK—Exhaust Systems

for service procedures.

SPECIFICATIONS

Tune-Up Specifications—On-Vehicle

Transmission

Initial Timing

at Curb Idle

Tot. Degrees

(California)

(California)

(California)

(California)

" J-20 OK Range 750 to 9 5 0

Troubleshooting