Valve gums are requested by engines every eye the Toyota 180 thousand kilometers, you never think the guides. The guides can reach 1 millon of kilometers
Good, change the seals, look slack in the valve tail to be seen, the same if it is not much, with changing the gomites ok, but since this fuck some segment and you have scratch one of the cylinders ... you no longer bother to spend money, you get more to change the car, you will be very compadre .. luck