Between the flanges of the cylinder head and the catalytic collector there is a sealing gasket made of two thin molded metal strips connected by spot welding
If the gasket is leaking, exhaust gases leak out, accompanied by a characteristic sharp sound.
If the malfunction cannot be eliminated by tightening the catalytic converter fastening, replace the gasket.
You will need: keys “10”, “13”, socket head “13”, pliers, ruler, feeler gauge.
Disconnect the wire from the negative terminal of the battery.
Remove the decorative engine cover.
Disconnect the exhaust pipe of the additional muffler from the catalytic converter by unscrewing the nuts securing the exhaust pipe flange to the catalytic converter flange, disconnect the suspension cushions from the muffler brackets and remove the exhaust pipe flange from the studs of the catalytic converter flange.
Remove the additional muffler.
Press the clamps of the harness block
Disconnect the wiring harness blocks of the control and diagnostic oxygen concentration sensors from the engine harness.
Press out the holders' tendrils
Disconnect the holders of the wiring harnesses of the control and diagnostic oxygen concentration sensors from the heat-insulating shield of the steering mechanism.
Use a 13mm socket to unscrew the bolts securing the catalytic collector to the bracket.
Using a 10mm wrench, unscrew the three nuts securing the thermal insulation shield of the steering mechanism to the engine shield (two nuts are located under the steering mechanism)
Remove the shield
Use a 13mm wrench to unscrew the two nuts securing the bracket for the water pump supply pipe
Remove the bracket.
Use a 13mm wrench to unscrew the eight nuts securing the catalytic collector to the cylinder head
Remove the collector
Remove the gasket.
Install the new gasket and all removed parts in the reverse order of removal.
Check the flatness of the surface of the manifold flange.
To do this, place the ruler with its edge on the surface of the flange and use a feeler gauge to measure the gap between the flange plane and the ruler.
Grind the flange surface or replace the manifold if the gap exceeds 0.1 mm.
To avoid sticking of the gasket and to improve its tightness, we recommend that before installation, lubricate the gasket on both sides with a thin layer of graphite grease.
Lubricate the exhaust manifold mounting studs with graphite grease.