Why does my alternator tensioner bolt keep coming out?

Why does my alternator tensioner bolt keep coming out?

Anyone having problems with the alternator tensioning bolt falling out? there is one bolt that does the tensioning through a small block which is bolted to the alternator. its the latter bolt that keeps coming loose- last time i loctited it in, and its STILL come out! Anyone else come across this and fixed it permantly?

What kind of bolt does an alternator need?

There should be another big long bolt that holds the alternator onto its mount. If you remove the alternator you will find there is a sliding threaded bush in it. The threaded bush is probably seized, it needs to be free to move as this bolt provides the most of the clamping force to hold the alternator when the big long bolt is done up tight.

What’s the best way to tension an alternator?

Suggestion : remove the block, screw in the long bolt from the opposite side, completely through, use loctite if that makes you feel better, put the block with long bolt back and add an M8 nylstop nut to the side where the long bolt’s head previously was. You can now tension using the nut. Or use a nut and lock nut instead of the nylstop.

What to do if your alternator keeps going bad?

Once youve got the belt tension set, then tighten the bolt to the threaded block, tighten the bolt holding the bracket to the water pump, then the long bolt that holds the alt to the engine. If youve never tried it this way, check it out, it works nicely.

Anyone having problems with the alternator tensioning bolt falling out? there is one bolt that does the tensioning through a small block which is bolted to the alternator. its the latter bolt that keeps coming loose- last time i loctited it in, and its STILL come out! Anyone else come across this and fixed it permantly?

There should be another big long bolt that holds the alternator onto its mount. If you remove the alternator you will find there is a sliding threaded bush in it. The threaded bush is probably seized, it needs to be free to move as this bolt provides the most of the clamping force to hold the alternator when the big long bolt is done up tight.

Suggestion : remove the block, screw in the long bolt from the opposite side, completely through, use loctite if that makes you feel better, put the block with long bolt back and add an M8 nylstop nut to the side where the long bolt’s head previously was. You can now tension using the nut. Or use a nut and lock nut instead of the nylstop.