[kevncar]

When I first bought my truck the PO had a rag stuck in one hole and an oil fill cap that fit real tight in the other. When I got home and noticed this (and the fact that the end of the rag almost caught on fire from the hedders) I looked around for a breather I used to have and couldn't find it. I put another oil filler cap i had in the hole and ran to the parts store to grab a breather. I heard a loud bang like a rock hit the underside of the hood on the way. when I got the breather and opened the hood to replace one of the fill caps...one was missing. This wasn't a high rpm, or long trip either...just a putt through town. They can really build some pressure quick.