W O T wrote:Well you dont HAVE to, just a suggestion. I personally dont trust the grading pressed into bolt heads anymore after a few mishaps. I had some suspension bolts break off at the head on my Crx, they were labelled grade 8 (m10 X 1.25 to be exact) And i had a very scary situation on the highway when the last one gave way.
Being as I worked at a bolt manufacturer at the time, I went to the store (princess auto) 3 months later mind you, so probably from a completely different batch of bolts even so not even a chance of the company just putting out a few bad bolts, and grabbed a few of the same "grade8" bolts. My coworker tested them and said they were garbage and were heat treated incorrectly and were brittle as hard nipples, said they may pass for a grade 4 BEFORE heat treat
A lower control arm pivot bolt isnt exactly something I want breaking while driving....
Im pretty cheap, but not with bolts anymore
Ok...No offense, but you worked at a bolt manufacturer and you don't know your grades of bolts? If your "grade 8" metric bolt was actually a grade 8.8 it's equivalent to a standard grade 5. Manufacturers obviously make mistakes when it comes to manufacturing bolts but they go through a lot of testing due to all the liability. Never had a reason to not trust what's stamped on the head, even though I fully agree that not all bolts are created equal.