Audi 80 Quiz
Exhaust System

Checking the Suspension and Exhaust System Condition

In this manual: Exhaust System
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

The exhaust system is attached to the transmission. Under the vehicle floor, it is secured loosely on rubber mounts.


PROCEDURE

Check the rubber mounts for wear, tears or damage. Replace any torn or damaged mounts.

Check the tightening of the exhaust manifold bolts (35 N·m) and the transmission bracket bolts (25 N·m), but do not apply excessive force.

With the engine running, hold a rag over the exhaust outlet tip(s) of the exhaust system. The engine should stall after a short time.

If you hear hissing sounds and the engine keeps running, the exhaust system is leaking at the point where the sound comes from.

A lower rumbling sound from the exhaust system than normal, and loud bangs during coasting, indicate rusted exhaust pipes.

Mufflers begin to rust at the welded seams (joints). If they are to last a while longer, they should not break when lightly tapped with a screwdriver.

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A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.