Then, next to that circled number, make a column with six rows and write down the corresponding firing sequence numbers next to each row (this is where you will record what happens when you rotate the distributor one-quarter turn clockwise for each spark plug). On your first note, circle the number where your first spark plug fired. Lastly, you will now refer back to your notes because you are looking for the engine’s firing order. Repeat this step (rotate the distributor 1/4, turn clockwise, and check for a spark each time) until you have noted down the firing sequence of all 6 spark plugs. Finally, rotate the distributor until your next spark plug fires and note down the number on your timing scale where it fired. If you did not have a timing light and needed to find TDC again, do so at this time. Ninth, rotate the distributor another 1/4 turn clockwise. Write down the number on your timing scale next to where you marked TDC. You should be able to see which spark plug fired because it will glow slightly and emit a distinctive sound when it does so. Start at N TDC on the timing scale and rotate the distributor clockwise until one of your sparks plugs fires. Step 8:Įighth, hold the brake pedal down with your left foot (or block it if you don’t have a brake pedal), then use your right hand to slowly rotate the distributor until one of your sparks plugs fires. If one or more of your wires is loose or has come off of its plug entirely, reconnect it to the plug and secure the boot tightly. Seventh, check your spark plug wires to ensure that they are all properly connected and that the rubber boots are securely attached to their respective spark plugs. If you did not label this position, you should do so before rotating the distributor. You should have already labeled this position with a piece of tape so you can read it easily before rotating your distributor. Sixth, rotate the distributor until the rotor “points” at the mark on the distributor cap that is closest to the number one position on the distributor cap’s outer edge. If you do not have a timing light, use your car’s odometer to accurately read where the mark is on the timing scale. Step 5:įifth, loosen the distributor hold-down bolt or U-joint and rotate the distributor until N TDC (top-dead-center) is marked on the timing scale. This will require pulling the emergency brake on flat ground to get enough slack in the cable to rotate your car. Step 4:įourth, ensure your car is pointing in a safe direction in case of an accident or if you release the brake pedal suddenly. Finally, slide the rubber boot over the new plugs’ threads before installing them to ensure no dirt or mud falls into the cylinders when you loosen and remove the distributor cap. Third, s et the spark plug gap on all plugs to 0.30 inches (if you don’t know how to gap a spark plug, there are many online tutorials). If there is no parking brake, make sure that you block both your car’s front and back wheels. Put the transmission in neutral (manual) or park (automatic). Second, set your parking brake and chock the front wheels of the car. If there is no hold-down bolt, you can use an SBC universal joint and a socket wrench to remove the distributor. Steps to Follow: How to Set Timing on SBC Without Timing Light Step 1:įirst, remove the distributor cap and rotor, then unbolt the hold-down bolt that secures the distributor in place on the engine block. Pencil and Paper for Notes/Record Keeping.Socket Wrench with Extensions and a Universal Joint.If not, then check all connections and double-check that the number one of the cylinder spark plug wire is connected properly. The headlight should flash on for about four seconds when the car starts up before turning off again. Then connect it directly to battery voltage with some electrical tape. The first step is to locate the number one cylinder spark plug wire this will be the wire going from coil to distributor or from coil to ignition module, depending on which type of system you’re using. Follow the step-by-step instructions mentioned in this blog post to know how to set timing on sbc without timing light. This installation assumes that you have already installed a distributor and wires in your engine. Without a timing light, you can use your vehicle’s headlights to set the timing on an SBC engine.
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