Checking the exhaust system for tightness (Mazda 121 (3))

In vehicles with a controlled catalytic converter, leaks in the exhaust system before the lambda probe can lead to the following damage:

Difficulty starting: the engine stalls, idles unstably. Runs intermittently when accelerating. Test conditions: engine cold or warm.

Start the engine and check the exhaust system for leaks by plugging the exhaust pipe with a rag.

At the same time, the assistant must visually check all connecting flanges for the presence of escaping exhaust gases (hissing sound, gas release is felt by hand).

Spray the connection points: cylinder head/manifold and manifold/exhaust pipe with a special leak detection compound and check for bubbles.

Eliminate the leak.

Exhaust system of 1.25/1.4 l and diesel engines (Fiesta Courier: Different shape, same dimensions)

Exhaust system of the 1.3L engine (except Ford KA)

Exhaust system of Ford KA models

The arrows show the connection points for replacing individual exhaust system components. The factory-installed exhaust system consists of two parts; the exhaust system supplied as spare parts consists of four parts.