Not real sure right now haven't looked at the S10 in a couple of days. Guess I have a bad valve guide on the Caballero so I got to pull the head and deal with that first. Burning a lot of oil on one bank and #5 plug had a lot of buildup on it. Shouldn't be the seals I don't think the guy just had the heads redone before I bought the car about 10,000 miles ago.