Question about 1986 Chevrolet S-10 Blazer

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How to set ignition timing - 1986 Chevrolet S-10 Blazer

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Hi Eric, Vehicles fitted with distributors using points (contact breakers) and condensers, which I believe is the case with your vehicle use a dwell angle setting. Initial setting is carried out with a feeler gauge. After replacing points and condenser, turn the engine until the rubbing block on the points is at the highest point against the distributor cam (at the centre of the distributor). Set the gap at 16 thousands of an inch or 0.45 mm. Inspect the front crankshaft fan belt pulley to identify the timing marks. Paint a white mark onto the pointer (fixed to the timing cover) and rotate the engine by hand until you see the timing scale on the crankshaft pulley. mark with white paint at 10 degrees BTDC and align the pulley to the pointer and set the points in the distributor (by releasing the locking bolt of the distributor body) to be at the exact point when it begins to open. Replace the cap and connect a stroboscopic timing light, start the engine and let it idle at normal idle speed and reset the ignition timing to the same marks painted with white paint. Don't forget to take all safety requirements seriously as you will be working on a running engine. Regards John

Posted on Oct 12, 2013


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