4.1a Solenoid shut-off valve that regulates the vacuum in the post-oxidation system
4.1b The flame arrester on the injection engine is mounted on the intake manifold in front of the damper body
Examination
2. Visually check the condition of all hoses.
3. Disconnect the hoses from the ejection tube, with the engine idling, plug the tube with your finger. As the speed increases, an increasing vacuum should be felt on the tube. Otherwise, the tube is damaged or clogged.
4. To check the flame arrester, remove the air filter and disconnect the hose from the flame arrester. Warm up the engine. Plug the flame arrester fitting with your finger, bring the speed to 3000 rpm and quickly release the throttle. At the moment of transition to idling, a sharp increase in vacuum should be felt. Otherwise, replace the flame arrester.
Replacement
Filter and reed valve
5. See Ch. 1.
Reed valve body
6. Disconnect the hose from the valve body, unscrew the screws and remove the body (located in the left corner of the engine compartment, photo).
4.6 Reed valve body
7. Check the condition of the reed valve. If necessary, replace by prying and pushing the valve out of the body.
8. Installation is carried out in the reverse order. Check the correct installation of the valve (photo). Secure the hoses with clamps.
4.8 Installation of reed valves. Check screw tightness "limiter" (arrow)
A tube
9. Remove the tube assembly with the valve body, to do this, unscrew the body screws, the fitting on the exhaust manifold (lubricate with penetrating liquid) and bracket bolt. Disconnect tubing from housing.
10. Installation is carried out in the reverse order. Lubricate the fitting with anti-seize compound.
Flash hider
11. Remove the air filter and disconnect the hoses from the flame arrester (photo). Installation is carried out in the reverse order.
4.11 Flame arrester hoses on V6 engine (shown with air filter removed)