Note: Before you begin, see. Chapter 2. When reassembling, use a new carburetor top cover gasket. To check the idle speed and mixture, you will need a tachometer and an exhaust gas analyzer.
Removal
1. Disconnect the negative cable from the battery.
2. Remove the round air cleaner on models where it is installed. On other models, disconnect the main air duct from the air cleaner, then disconnect the vacuum pipe and breather hose from the air block. Unscrew the three mounting screws, remove the air block together with the main air duct.
3. Clean the carburetor thoroughly.
4. Disconnect the fuel supply hose from the carburetor. Plug the end of the hose to prevent dirt from entering and further fuel loss.
Text was copied from the portal OPELBOOK
5. Mark the position of the automatic air vent cooling hoses to facilitate installation, then disconnect the hoses. Plug the hoses or secure them with the ends facing up to prevent coolant loss.
6. Disconnect the electrical wiring from the damper heater.
7. Disconnect the lower vacuum hoses from the Pull-down valve assembly.
8. Unscrew the four screws securing the top cover of the carburetor, remember their location, as they have different lengths (see illustration).
9. Remove the top cover and gasket.
Inspection
10. Position the lid vertically so that the float hangs on the pivot pin. Then tilt the lid until the needle begins to close - the needle spring should not be compressed by the weight of the float.
11. Measure the distance X (see illustration) from the base of the float to the surface under the gasket on the top of the back of the cover. If the measured distance is greater or less than the specified value, the float weight is incorrect and the float must be replaced.
12. If the float top position is correct, reassemble the carburetor using a new top cover gasket. Check the idle speed and mixture quality as described in Chapter 14.
13. Use a punch to knock out the float mounting pin from the base of the top cover, remove the float and needle.
14. Check the condition of the components, replace as necessary. Check the float regulator needle for signs of wear, check the float for leaks, i.e. is there gasoline inside it.
15. Clean the mating surfaces of the carburetor body and top cover.
Installation
16. Perform installation in reverse order, paying attention to the following.
17. After installation, check that the float and needle move completely and freely.
18. Use a new gasket between the top cover and the carburetor body.
19. Check that all hoses, tubes and wires are connected correctly.
20. Finally, check the coolant level and, if necessary, top it up as described in Section 3. Check and, if necessary, adjust the idle speed and mixture as described in Chapter 14.
Visitor comments