Well on Monday I pick up the block to plug the balance shaft oil passages. I tried a search and with not alot of luck. So i say i got this I found the bit tap and plug at O'Reilly's forget about Lowe's Home Depot they don't have them well the tap that is. So I'm posting my experience with photos if anyone would like to try this at home but I have to warn you it wasn't as easy as I thought it was going to be for me anyway when the drill bit snapped off I knew I was in trouble the rear Passage is at an angle so I had to grind down to make it square so the drill bit and tap would go in straight I was sweating bullets thinking if I break the tap off in here but I think it's going to be okay after all is done Machining wise I will use red Loctite. I was careful not to drill clean through where the cam bearing sits so I stopped short about 1/8 in. Now i find myself a little under the weather and hadn't messed with it since.