So in your expert opinion is a visual inspection all that is needed to reject a fastener? I have been a technician for over 30 years and have rebuilt probably 100 engines of all types. I always replace head bolts and main cap bolts on an engine that has been in service for 50 years and is going to be whooped on repeatedly. On regular passenger car engines that have come in to the dealership that need a rebuild due to head gasket failure I always replace the head bolts. What is your professional opinion on reusing plastic region stretch bolts.
I've been doing a lot of rebuilds lately and sometimes the head bolts don't seem to pull that 90 degree turn all the same, some feel like they pull down easier than the others. The bolts are too long to fit my calipers so I have never tried to measure them for comparison.
Thanks
Gus