Spark Plugs and Wires
Buick Century
Toyota Sienna
US Army

How do you change rear spark plug 1991 buick century 6 cylinder?


User Avatar
Wiki User

If it is 3.3 liter engine it's a bit difficult. I had a 93 century I'm sure engine design didn't change much...

Requires a 3/8's ratchet and spark plug socket with an extension. How I did mine was placing the socket/extension on spark plug then ratchet. Just have to reach back there and get your hands dirty