WHITBREAD STUDS UPDATE
Edit:
Contact Matt if you have
already purchased, any future purchases will be an updated kit. The problem has been identified, detailed further on in this thread.
Original post below:
I realize this topic is going to seem somewhat controversial because I am probably well-known as being an advocate for buying at ID Parts. However, this has nothing to do with where you purchased them. The physical studs that are being sold by
Whitbread do not fit on stud locations 11-14. This would be the far passenger side outside row.
If you look at the underside of the valve cover, you will see a "web" of aluminum between the oil passageway for the exhaust camshaft and the outside wall of the cover. There is an arch in this aluminum because of where the studs or bolts mount. Because the replacement studs are considerably taller, they prevent the cover from seating properly. Nearly a quarter inch needs to be shaved from the top of the stud which ends up removing any ability to thread it in with a hex driver.
I will be posting pictures of this discovery,
if I cannot attach them to this posting.
This is the original stud and one of the longer studs side-by-side.
This is what they look like when they are installed
An engineer can confirm this for me, however I have always had the understanding that once you exceed the number of threads equal to the diameter of any fasteners, any extra threads captured are providing no extra force. This is why extra threads above the nut have no gain in power, but also deeper into the block does not add any extra strength either. These longer studs bottom out in the hole, and must be backed off a small amount according to ARP. But they are still overall far too long for installation in that row in the head.
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