MDchanic

This should be an easy question:

Is there such a thing as ½" Head Bolts with those male threaded portions above the hexes for attaching alternator and A/C brackets?

Once I get a 350 built and installed, this won't be a problem, but that's probably over a year away. Right now, the car's got a 260 in it, and I'd like to install a matching set of year-correct pulleys and brackets, as the current ones don't match up (some have a ½" offset ), but, obviously, in order to do that, I'd need those head-bolt attaching points, and the 260's got those large head bolts, which I have not encountered with the threaded ends.

Thanks...

- Eric

joe_padavano

MDchanic

Thanks, Joe! I'd never actually seen any, so I wasn't sure if they were real.

I'll be on the lookout next time I'm in the junkyard.

- Eric

2blu442

Eric, I've got some from a 403, I believe they're the same. Send me your address in a PM and I'll get pictures and shipping costs for you. John

ROCKET VAPOR

Eric, have you tried AMK?

http://www.amkproducts.com/bulk1.asp

Bluevista

For what it's worth, in the parts catalog those are called "stud end" bolts.

I remember loosing one of those fine thread nuts for the one for my AC bracket. Actually had to go and buy another one, I found it a few weeks later of course.
The rod bolt I found in the bottom of my oil change container is still bothering me.
Would a rod bolt even fit through the oil drain plug hole?

MDchanic

Well, AMK is the Magic Kingdom of fasteners, and I do have their catalogue, but I was thinking of something a bit cheaper for my purposes. This car ain't no restoration, and a pair of bolts at the junkyard is a "throw-in" item that doesn't actually raise the price of the other items already on the table...

Thanks anyway though - it was a good idea.

Thanks! Easier to find if you know what they're called!

And I wouldn't worry about that rod bolt - you've got 15 others in there.

- Eric

edit:
I'd have to go measure my own, but I think these are those.

Like I said, though, $8.00 plus shipping is pretty steep for something that's basically free at the junkyard .

blueRAYwhale

yeah there is,(at least as far back as '74), '75-'77 they were used in different locations on the heads. some used for A/C brackets, some to attach the grounding cable from the battery. i think the A/C one uses a spacer under the bracket and a lock washer under the nut. not sure about pre '75, the alt. doesnt use head bolt(s) on any of the brackets, it does use the front exaust manifold bolt though and a intake bolt(no spacers). the upper/front head bolt on the drivers side for the battery ground(shorter stud/fine thread/star washer). the passenger side uses a long one(long stud). the power steering pump uses a bolt/spacer going into the block just above the oil pan, and a spacer on the water pump stud. best to have all the correct bolts, spacers, and orientation. find a mid to late 70's Olds. motor, 350 is a good candidate, complete and make note of location of stuff, the place i go to just gives me stuff like that.

joe_padavano

1976-older motors used 7/16" head bolts. 1977-up used 1/2" bolts.

blueRAYwhale

thanks for the info., come to think of it i don't think i got any bolts off of a '77, looked at alot of them, good to know. i think the mounting locations for the accessories is the same, maybe not because some cars came with those AIR pump things in '77.