 they will tell you, you flush that coolant, you check or replace that cap. Preferably replace it, not just because they sell them, but because if a cap is good today, it might be bad tomorrow if it's already 15, 20 years old. So do it. I mean, look at this. If they would have put an engine in that truck or put head gaskets in it, they still would have had this problem and said, oh, I guess we better put a cap on it. Oh, we fixed it. Give me the $4,000. Or they would have been calling saying, your work is terrible and your engine is bad. It's doing the same thing.