Difficulty
Easy
Steps
6
Time Required
00:10:00 - 00:20:00
Tutoriel complet
Ce tutoriel contribué par la communauté est complet et prêt pour l'examen de l'équipe Oscaro.
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User contributed
Parts
No parts specified.
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IMPORTANT! Remove the battery to perform this operation to avoid any problems!! (remove the - first and then remove the + and for reassembly put the + first then the -)
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Use a jack and lift your car on one side only, it is important that one wheel touches the ground
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Engage 4th gear, otherwise we won't be able to drive the engine
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You have to remove the distributor head, it is held by the small clips that I show in the photos then the rotor (small black tip with the copper rod in the center) you just have to pull it upwards, this will allow us to have access to the platinum screw/breaker (see photos)
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To spread your breaker as far as possible, you will have to turn your wheel, therefore drive the engine, in order to be positioned on the top of the cam which will mean that your breaker will therefore be spread as far as possible (see photos)
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In my photo you can't really see it but I'm definitely on a cam and you can see that my contact is well separated.
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In the diagram we can see the 4 cams where it is possible to position oneself to carry out the adjustment
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Now you will need to take your blade set and choose the 0.40mm shim
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Pass your blade between the two contacts of the breaker and check if your spacing is correct or not (see photos for positioning)
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If your spacing is too tight or not tight enough,
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you will have to unscrew your screw with a large flat screwdriver in order to free the small plate (see photos)
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Do not unscrew completely, just unlock it.
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tighten or loosen the nut (see photos) If you tighten you will then increase the gap between the two contacts, but if you loosen the nut it will reduce the gap. Your 0.40mm shim must have a smooth slide between the two surfaces and you can feel that it touches well on both sides
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After adjusting your spacing, simply tighten the screw that holds the chainring and your adjustment will no longer move!
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After making your adjustment, turn the wheel to reach the other top of the cam and check if your gap is still the same, do not hesitate to make several turns of the cam to check and be sure
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If you ever notice that the spacing is no longer correct, you will then have to start the previous step again and then do this step again!
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Now you just need to put your rotor and the distributor head back on correctly, there is a groove for the rotor, it is impossible to make a mistake on it, don't worry, lower your jack, remove the 4th and that's it, you're done!
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I hope I helped you and if you have any problem do not hesitate to contact me!
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simple and easy adjustment to perform, this will allow you to have better performance on your ignition!
simple and easy adjustment to perform, this will allow you to have better performance on your ignition!
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3 Comments
Hello
Thank you for this help, clear, precise. After adjusting the breakers, should we not do a PHM adjustment? And can we replace only the faulty capacitor, by cutting and connecting the cable?
Thank you. Regards
Hello
If the gap is not good (too wide), what are the consequences? No increase in the revs, no power? Because after changing the paltin screws, the car started off perfectly but
Thank you for your reply, on my Alfa 1750 I changed the contactors and after 100 km and a traffic jam on the motorway, the car started to hiccup and choke above 2500 rpm: you had to stay in 5th at 2500 rpm (70 km/hour) to reach the garage……!
What do you think?
peymiche
Hello, sorry for the late reply, when the gap is not sufficient you will have misfires and if there is too much gap you risk not having any ignition at all! Concerning the alpha I have no idea in mind, it could be several different things sorry!
