Originally Posted by
Jay,
not a fitting error at all Toby it expansion difference and some are lucky some are not
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.
Last edited by Adam-M; Nov 2, 2017 at 10:36 AM.