Warning: The distributor runner on some 20 valve engines is shaft mounted and if damaged the complete distributor will need to be replaced. Do not attempt to remove the distributor runners on these engines.
1. Wipe the outside of the distributor.
2. Remove the distributor slider from the drive shaft, then lift up the dust cap. Make sure that the cover mounting bracket does not contaminate the Hall rotor.
3. Mark the position of the Hall rotor relative to the drive shaft, then remove the circlip, remove the rotor along with the locating pin.
4. Remove the flat and spring washers, marking their installation position.
5. Where is it used; remove the screws, remove the vacuum chamber.
6. Remove the circlip and washer from the base plate, and remove the screws securing the socket to the side of the distributor. Take out the magnetic sensor and socket.
7. Remove side screws, lift base plate and thrust washer. Also remove the spring clips.
8. Clean all parts, check their condition.
9. Inspect the inside of the distributor cap for signs of burning or running out. Make sure the carbon brush in the center of the cap is in good condition and moves freely against spring tension.
10. Check that the distributor slider is not damaged. Using an ohmmeter, measure the resistance between the copper contact in the center of the distributor slider and the copper contact at the edge of the slider. The resistance should be 600-1400 ohms.
11. Where equipped, create a vacuum at the pipe-to-vacuum diaphragm connection and check if the diaphragm assembly return linkage moves. Fix the diaphragm with a vacuum and check if there are any holes in it.
12. Assemble the distributor in the reverse order of disassembly, lubricate the working surface of the support plate bearing. Finally, rotate the drive shaft quickly and check that the Hall rotor is not pinched or bent.
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