Why are the connecting rod bolts coming unscrewed?
The connecting rod bolts are straight and un damaged , they do show fretting and aluminum plating on the shanks, indicating that the bearing cap had been sliding up and down for some time, what freaks me out is that nobody heard the motor knocking. You are judged not by what you know, but by what you can do.
What can I do to keep bolts from falling off?
While these devices do prevent the nut from falling off the bolt, they generally do not help the joint maintain the specified clamp force. Prevailing torque nuts. Nylon or metal inserts inside a nut (sometimes called a “lock nut”) can add extra friction to prevent loosening.
Are there any penetrating oils for nuts and bolts?
In a published article in Machinist Workshop Magazine, they tested some commercially available penetrating oils on a group of nuts & bolts they had scientifically rusted to a uniform degree in a salt-water solution.
What happens when you tighten a nut on a bolt?
In a bolted joint, tightening the nut actually stretches the bolt a small amount, like pulling on a stiff spring. This stretching, or tension, results in an opposing clamp force that holds the two sections of the joint together.
The connecting rod bolts are straight and un damaged , they do show fretting and aluminum plating on the shanks, indicating that the bearing cap had been sliding up and down for some time, what freaks me out is that nobody heard the motor knocking. You are judged not by what you know, but by what you can do.
What’s the best way to UN bolt a rusty fastener?
Basically there are two tried and true methods for un-bolting rusty fasteners, penetrating oils and heat. Let’s discuss penetrating oils first. Many enthusiasts quickly grab the can of WD-40; hose down the bolt then try to turn it two minutes later, often times without success.
While these devices do prevent the nut from falling off the bolt, they generally do not help the joint maintain the specified clamp force. Prevailing torque nuts. Nylon or metal inserts inside a nut (sometimes called a “lock nut”) can add extra friction to prevent loosening.
In a bolted joint, tightening the nut actually stretches the bolt a small amount, like pulling on a stiff spring. This stretching, or tension, results in an opposing clamp force that holds the two sections of the joint together.
