The check is carried out every year.
The check should be carried out with the engine cold. You will need a source of compressed air to test.
1. Start the engine and check up tightness of system of release by ear.
2. Stop the engine.
3. Insert the compressed air fitting into the exhaust pipe, sealing it with a rag.
4. Apply pressurized compressed air 6 atm.
5. Lubricate the cylinder head-to-manifold, manifold-to-downpipe, and downpipe-to-catalytic converter joints with a leak detector and check for bubbles.
6. Repair the problem.
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