Thread depth in block

[TD-5]

I have searched & read all the threads I could find on head studs, but could not find what I was looking for. Does anyone know what the depth of the head bolt/stud thread well in the cylinder block is? Or has anyone got a bare block kicking around that they could get a few measurements from with a depth mic.
I want to compare the thread well depth to the thread length on the studs, but I don't have my motor apart yet.

 

[Stroked777]

May I ask why your looking for this info? Just curious and bumping the thread

 

[TD-5]

In the discussions on head studs & cracked blocks one of the theorys was the stud might actually bottom in the threaded hole during the torquing proccess, stressing the block & causing it to crack. Wanted to get some depth measurements from a varity of the holes and compare the measurements to the length of threaded section on the stud & see how close they are. Also if all the holes measure the same. Just wondering if inconsistent tollerances in the automated machining process could cause some of the threaded holes to be shallow. NOT likely, but just another thing to eliminate as a cause before I start. I will be measuring the threaded holes in my block just to make sure.

 

[Luke@MillerPerformance]

In the discussions on head studs & cracked blocks one of the theorys was the stud might actually bottom in the threaded hole during the torquing proccess, stressing the block & causing it to crack. Wanted to get some depth measurements from a varity of the holes and compare the measurements to the length of threaded section on the stud & see how close they are. Also if all the holes measure the same. Just wondering if inconsistent tollerances in the automated machining process could cause some of the threaded holes to be shallow. NOT likely, but just another thing to eliminate as a cause before I start. I will be measuring the threaded holes in my block just to make sure.

Sounds more like the studs aren't being install hand tight, or there is oil and junk at the bottom of the hole. I always take an old bolt and cut some notches in it to make a tap to run down and clean them out. You wouldn't believe the how much comes out just from pulling the heads, even worse if it's been to a machine shop.

 

[Stroked777]

I honestly wouldn't worry about that, people who torque them to 275 haven't had problems. It seems to be an issue when people reuse the studs and have to torque it down more to about 310 I believe. Most people have had good luck just getting a new set of studs if then ever take their heads off after doing studs for the second time