Carburetor engine of the car "conditionally" runs on gasoline. In fact, fuel is a mixture of it in a certain proportion with air. It is reached inside the carburetor and then fed into the cylinders. So, this device plays a fundamental role in the operation of a car engine. Periodically, he should do maintenance. But sometimes, when its poor performance is clearly visible, the carburetor should be completely disassembled and the defective parts discarded.
Necessary
- - key for 10;
- - medium curly and simple screwdrivers;
- - key for 13.
Instructions
Step 1
Remove the air filter by unscrewing three nuts with a 10 open-end wrench. Disconnect the return spring, rod from the choke actuator lever, choke actuator cable. Loosen the clamps and remove the fuel hoses. Drain the remaining gasoline into a container and close the hole with the plug. Using a 13 wrench, unscrew the four nuts and remove the carburetor from the intake manifold. Close this hole with a rag or plug.
Step 2
Take a curly screwdriver and remove the screws that secure the top cover to the carburetor. In doing so, do not damage the gasket and float. Disconnect the throttle body. Be careful not to damage the adapter sleeves and their seats. Carefully remove the thermal insulation pad. Disassemble the carburetor cover and body.
Step 3
Wash the parts of the float mechanism in gasoline or acetone. Examine them. The float must be of the correct geometric shape, without distortion or damage. Check the needle valve. It should move freely in its nest, and the ball should not hang. Replace defective parts with new ones.
Step 4
Inspect the carburetor cap. Rinse and clean it and its channels from dirt in acetone or gasoline and blow with air. Check sealing surfaces. If you find defects on the cover, replace the part.
Step 5
Rinse in gasoline and clean all parts of the starting device, blow them with compressed air. Inspect them and replace defective ones. Unscrew the jets and emulsion tubes carefully. Rinse and blow them out. Do not clean the nozzles with a wire so as not to flare the hole, or with a soft rag so as not to clog the channel.
Step 6
Check the carburetor shut-off valve, it should operate at a voltage of no more than 9 V. If there are interruptions, then check its needle for jamming. Take a megohmmeter and check the resistance of the coil, in case of discrepancy with the nominal value (150-160 ohms), replace the valve.
Step 7
Clean the carburetor body from oil and dirt. Wash it in gasoline and blow with compressed air. If necessary, use special sweeps. Check the sealing surfaces, if a defect is found, replace it. Inspect the accelerator pump. Wash its parts in gasoline and blow with air.
Step 8
Check the movement of the ball in the valve, it should move without delay. Test the moving parts of the pump, they should move easily, without jamming. Examine the diaphragm. If defective parts are found, replace them with new ones.
Step 9
Clean the parts of the second chamber throttle valve pneumatic actuator. Rinse and blow through them with air. Check the diaphragm, it should not be damaged. Clean and inspect the throttle body, rinse it with acetone or gasoline. Damaged elements - replace. Assemble the carburetor.
