Studs without removing head ?
I'm 99.9% sure RealStreet didn't have aftermarket headstuds when they were running the stock block. (Proof)
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From here: https://www.s2ki.com/s2000/topic/938...esults-inside/
So basically after prolonged exposure to 31psi (and lots of time with a little lower than that) is when the stock headstuds finally gave out for them.
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Conclusion: Nothing actually broke. No cracked sleeves, no damaged pistons, A freeze plug popped out of the head and pushed coolant into the valve cover (and out of the breather). The Pistons, Rods, Bearings, Sleeves, Block, Rings, everything was undamaged. It appears the prolonged high cylinder pressure exeeded the clamping force of the original stock head bolts and lifted the head, pressurizing the cooling system and popping out the freeze plug. All the engine needed was a freeze plug popped back in, and go back at it.
So basically after prolonged exposure to 31psi (and lots of time with a little lower than that) is when the stock headstuds finally gave out for them.


