06 XC90 - tensioner gave out I guess, belt is loose and jumping teeth. One cylinder is questionable, hear a little blow-by with 120 psi air put on it. Other 4 are good! -- Question is, installing a new timing belt, can't the marks line up being 180 deg off? If so, how do you tell which way is right. Thanks!! Lamar -- on second thought - I guess it would be 360 deg off. . .