I need to know what size bolt is needed for the dipstick mount on the engine block? Mine came out a long time ago and the oil change place nearly pulled the entire dipstick tube out. I didn't notice for nearly a week. So yea you guessed it, there's oil over everything under the truck and it smells wonderfull under full throttle. Local ford dealer said they coudln't fix it cause of aftermarket exhaust, I said BS. The hole for the bolt is on the block between 2 exhaust ports. So that leaves me to do it. So can someone tell me what size bolt it is?