Broken intake bolt heads?
2007 GT with a Series VI Supershaker installed.
Has anyone else experienced broken heads on their intake bolts? Twice now I have found the head broken off of the front most bolt. Once on the driver's side, once on the passenger's.
I was checking the bolts to make sure they were snug this morning and found that the head was broken off of one of them. My other bolts were also loose. According to the manual (p 45-2) these are only to be tightened to 91 lb-in, so I'm at a bit of a loss for how I've had two heads break off now across two different reinstalls.
Bolts are M6 x 1mm, and are grade 10. Did I just get a bad batch and maybe I should get all new ones?
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