The two dog bones on top of the motorare takin loose and you can tilt the motor forward
there are 3 in the front and 3 in the back of the motor near the fire wall
GOOD ANSWER ALSO BE SURE YOU USE A DEEP SOCKET, I HAVE USED A SHORT ONE AND CRACKED THE SPARK PLUG INSULATOR MORE THAN A COUPLE OF TIMES. THEMPLE i have a '94 corsica, and i changed the back plugs using a ratchet, spark plug socket, and a swivel. i could reach 2 of the plugs from the drivers side and the last one from the passenger side. hope this helps.
ummm follow the spark plug wires from the three little black boxes on the back/top of the intake to the block u will find three plugs in the front and three in the back
easy.........take the old spark plugs out and put the new spark plugs back
you need to take the intake off to get to the back three plugs...
The spark plugs are on the front and back of a V6 (back ones are tough to get to) L4 right in front. Turn the engine off and take off the spark wires unscrew the plugs
assuming its a V6... You have to remove the air intake manifold in order to get to the back three plugs. The front three you simply remove plastic cover and remove.
Replacing spark plugs is pretty simple. Disconnect the battery, remove the cover and cables, remove the old spark plugs, put in the new spark plugs, put the cover and wires back on the spark plugs, and reconnect the battery.
the plugs on the back are very difficult. How is this done.
I own a 1994 Bonneville and replacing the back spark plugs was not too bad, there is enough room and with a socket extension you will have no trouble.
You need to use a short extension and a swivel on your ratchet with a spark plug socket to get to the back three spark plugs. Feed your pieces in carefully one at a time to get the clearance you need. If they fall in just put the rest of your pieces in till they link together and you can pull them back out. Hope this helps.
There's three on the front of the engine(can't miss them), and three on the lower back of the engine, in front of the firewall