Originally Posted by
Adam-M
Didn't Tony measure the head after heating it upto 92 degrees and it expanded by 17thou? Stretch bolts would allow that but ARP's won't and the pressure just seems too much for the threads. Dont get me wrong previous owner fitted them to mine and when I stripped the engine the threads are ok.
Iirc yes Tony did look into it and like I say some are lucky
Originally Posted by
costina
Really i am an engineer by trade so was fitted correctly.
Even Tony dont use these bolts and if they was that good ford would have use something similar....
Hence the stretch bolts due to alloy head and block heating at different rates.
Which also brings another reason to the table clamping force would cause the block to split at the top too