Cam seals

[OmMEGGA]

I'm doing 60K and I am planning to replace the 3 cam seals and crankshaft seal.
Now Crank seal and the rear cam seals are bad (caked in oil residue) . But the 2 upper ones show absolutely no oil leak. Dry as bone and they look very new (They have never been replaced as far as I know) . Car has 178K miles. Is it smart to replace them anyway (I have the seals) or should I skip it? :swing:

 

[rubydist]

replace them all. it is one of Murphy's laws that a non-leaking seal will begin to leak as soon as you pass up the opportunity to replace it during other maintenance.