Chevy, Gmc, S10 Blazer, Jimmy, how to replace spark plug, gap. Step by step guide with pictures.
tools may be necessary. Make a survey under the hood to determine if special tools will be needed.
3 The best approach when replacing the spark plugs is to purchase the new ones in advance, adjust them to the proper gap and replace them one at a time. When buying the new spark plugs, be sure to obtain the correct plug type for your particular engine. This
7: If compressed air is available, use it to blow any dirt or foreign material away from the spark plug hole. A common bicycle pump will also work. The idea here is to eliminate the possibility of debris falling into the cylinder as the spark plug is removed.
8: Place the spark plug socket over the plug and remove it from the engine by turning it in a counterclockwise direction.
9: Cornpare the spark plug to those shown in the photos on the inside back cover of this manual to get an indication of the general running condition of the engine.
10: Thread one of the new plugs into the hole until you can no longer turn it with your fingers, then tighten it with a torque wrench (if available) or the ratchet. It might be a good idea to slip a short length of rubber hose over the end of the plug to use as a tool to thread it into place (see illustration). The hose will grip the plug well enough to turn it, but will start to slip if the plug begins to cross-thread. in the hole - this will prevent damaged
threads and the accompanying repair costs.
11 Before pushing the spark plug wire onto the end of the plug, inspect it following the
procedures outlined in Section 37.
12 Attach the plug wire to the new spark plug, again using a twisting motion on the boot until it's seated on the spark plug.
13 Repeat the procedure for the remaining
spark plugs, replacing them one at a time to prevent mixing up the spark plug wires.