Noise when torquing crank bolt

[vasy]

I replaced timing gears yesterday. At the end, when I reinstalled the crank pulley, I torqued the crank bolt to 130 ft.lb. I coated the bolt with a little oil as specified by FSM. I first torqued it to 33 ft.lb, then to about 100, finally to 130. When the torque was about 120, I felt the bolt moving suddenly and at the same time, I heard a rather unpleasant noise in sync with the bolt movement. It appeared that when the bolt was turning, it made such a noise. I heard it twice when I was applying torque. The noise was not coming from the torque wrench and I don't think I cross-thread the bolt. Is this normal when torquing crank bolt? I also noticed, when aiming a mirror at the crank snout hole, that the thread inside the snout is a bit unusual. At the very far end (deep into the snout), the hole diameter seems smaller than the rest of the snout hole. But the crank bolt doesn't look tapered. I didn't pay a lot of attention to it at that time. The car runs fine and the crank pulley does not wobble. Can someone explain?

[GeneralDisorder]

Bolts will make creaking noises when they get tight. It's just the nature of tight fasteners.

 

It will be fine. I don't even torque crank bolts - just hit them with the old hand-impact a few times and you are good to go.

 

You worry too much

 

GD

[Fairtax4me]

Pretty normal. Fasteners in general will make noise when you get them tight. They can pop, click, squeal, etc. Ever loosened a rusty lug nut? Rusty U bolts are the worst.

[idosubaru]

normal.

 

if it only creaked twice, you should have kept going, that's not tight enough! :lol:

 

these bolts come loose frequently when not installed tight.

[davebugs]

It that little bit of creaking annoys you may I suggest you prepare yourself if you ever do a head gasket job. No matter how much lube, they always creak a lot.