GMC Other Repair Question
Getting a freshened up engine to fire?
The first thing to do is take the number 1 spark plug out and put your finger or thumb in the hole. Have someone else bump the starter until the compression blows your finger out. This will be top dead center on the compression stroke. Now look and see where the distributor is pointing, is it at number 1 plug wire? If it is turn the engine back to about 12 degrees BTDC and turn the distributor so the rotor points directly at the number 1 plug wire. If you take a marker and mark this position on the distributor housing when the cap is on it is easier than putting the cap on and off to find the number 1 position. Tighten the distributor down again and try to start it, you should be close enough to get the engine started but may have to do some final tweeking,
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