What the heck is with my harmonic balancer?¿?¿?¿?¿

[Radish150]

I had my stock 67 40 motor yanked today to do some ahem... work on the bottom end (dont even ask ) and I about coughed up a hairball when I saw the mechanic just yank off the pulley and dampner assembly. There was no customary (to me anyway) bolt and washer like every other internal combustion engine I have ever seen in my not so short life. Um... Anyone have ANY idea what gives on this? Is this normal? I was watching and he just said... oh it´s loose and pulled it off. On the front of the pulley it has a very funky looking spirally cut into the front end of the pulley where a bolt should go, but there are no threads in the crank. BTW it was not leaking any oil from the seal so it was relatively stable. So... what, should I just locktite it ???? I´m pretty befuddled on this, please advise!

Thanks
Mark Sheldon

 

[Poser]

Press on pulley with no nut was stock until late 1969.

 

[Radish150]

Wow, thanks... are they meant to come off so easily? By hand? should I locktite the crap out of it? I was sure that when I went back down in the morning I would find a broken off bolt in the crank.... YAY!!! a disaster that didn´t happen.

thanks again
Mark...

 

[Poser]

It is an interference/press fit. If the pulley was removed by hand with little to no effort, you will want to use some kind of a retaining compound (green locktite), or, even better, upgrade to a newer style crank with a press on pulley and large retaining nut/mechanical locking plate.

 

[FJ40Jim]

If it concerns you, the best fix is upgrade to a 69-later crank and balancer and nut.

 

[FJ40Jim]

Dang, Poser types faster than me.

 

[grant5127]

this thread concern plus the other thread on the 30+ over question = a upgrade( better) crank with later features.......

 

[FJ40Jim]

this thread concern plus the other thread on the 30+ over question = a upgrade( better) crank with later features.......

Oh yeah, you're right.

Already cut .030, and the balancer is falling off the front...
Now I'm concerned, and it's not even my junk.

 

[Radish150]

Yes, yooryte of course. But for now thanks for the green locktite recomendation.

Mark...

 

[Radish150]

Worried:

Ha, you think your worried now, wait till you read my con-rod post

 

[FJ40Jim]

Shhiite, man. The more you post, the worse it gets.

Put the crescent wrenches down and step away from the Cruiser.