Need your help guys I got a 90LS teg w/ 179.000 miles on it and i notice that im loosing oil on the engine and found out that theres mixture of oil in radiator cap and reservoir. I didnt see any leak under the engine but a friend of mine says it need a head job. if thats the problem should i just rebuild the head? or the whole engine? or get a low mileage used engine? whats best to do? 
thanks.
if you’re lucky, just a head gasket.