Question???

[Maniac69]

Ok got a problem my 91 celica st has started making a knocking sound and I'm not sure what is causing it
a friend and I took off the spark plug wire boots to all the plugs and found some oil on the center two boots!
so I was just wanting too get you all's opinion on it ....I'd apreciate the help ............... thanks.

[91 Celica St]

ooooohhhh blown head gasket, that a nice $600 fix, uinless you do it urself witch is what id do, replace the timing belt while ur at it and ur good to go