The pulley is riveted on to the balancer and I need to put a 3 pulley system on it . Looked on the form but couldn't find anything. Any ideas? Thinking about drilling out the rivets and and tap in bolt holes ! Any body done this before ? This is on a early 265 chev motor, said date is 05-1955 Thank you in advance !
X2 on replacing it but there most likely arent any threads in the crank which could make installing a pain, and if you plan on stacking a bunch of accessories on there, the lack of a bolt could mean spinning the balancer on the crank eventually.
Pretty sure the holes would nowhere near line up and the center of the 265 has a raised center register. Probably easier to whip up a pilot tool and drill and tap the crank.
I just drilled out the crank on a 58 283. Was not a bad deal at all. It was on the engine stand so that made it a tad bit easier. I taped a welding rod on the top of the snout as a guide to make sure I stayed plumb and level. Tapping it out to 7/16 was a little slow but took my time and it went quite well.
Still a press fit in the later years. Jeff J, look at this http://www.summitracing.com/parts/pio-872001/applications/make/chevrolet?prefilter=1 and look at the second application, 1955 265. This one is a lil more balancer than you need. But it show's that you can use a later balancer.
Yeah, the later SBCs all used a press-fit balancer. When chevy began using the big diameter balancers, they drilled and tapped the crank snout but they still have to be pressed on and off.. Use a common 283/307 balancer with a bolt-on pulley.
I had a 57 that the rivets came loose on. It had three holes to install a puller. I put three bolts in it and stop the loose rivets. Why can't you bolt a different set of pulleys on there.
^^^^^ See post #12 on this link http://www.jalopyjournal.com/forum/showthread.php?t=674142&highlight=265+balancer it confirm's 2 bolt's across.
I'm learning. I understood the early balancers had a shorter snout/shank/collar (whatever you want to call it) than the later. Also, I understood the early cranks have a shorter distance from the tip of the crank to the step for the crank sprocket, limiting them to early balancers. If the inside specs are identical between the two balancers I guess you could machine the snout down? It's been years since I've researched this but I talked to a few guys that ordered aftermarket balancers for the early sbc's and they didnt fit although summit claimed they would. They ended up having them rebuilt. Can someone confirm from personal experience that an aftermarket balancer is available? I would love one
^^^^^ ****, the difference may only be 1/8" or less, but that's only a guess on my part. The 265's had a oil sling washer that fit between the lower timing gear and the snout of the balancer.
Turns out all my late model balancers are on motors, i dont have time to pull them just yet. Maybe tomorrow. But, I have the balancer off a '56 265 which I believe is identical to a '55. The total length of the snout is 1.1" and the distance from the tip to where the seal sits is about 0.5".
Thanks for the info **** . And there are only 2 holes in the 55 balancer and it is a rivet on pulley. It would be nice if the balancer from Summit would fit ! Anybody out there use the one from Summit ?
It will fit Jeff, go back and open the link and scroll down just a small bit. You will see that it fit's 55-57 265. All you really need is a later basic 283 307 balancer. Those are cheaper than the one I posted on the link.
Had to drill and tap the crank,7/16-20 to put the balancer on but it works and wasn't that hard ! Thanks all for the help. Got a balancer for $60.00 brand new from a engine shop and bolted right on, Pulleys line up . Ready to finsh the a/c
Since changing pulley weight is straying from the overall designed weight (m***) of the finished ***embly for that particular engine, should one remove material (in a balanced process) from the balancer itself to offset the added weight of the larger pulley m***? I know that a lot of that goes out the window anyway because the engines we play with are far from stock but I often wonder when someone shears one off when racing if that isn't the reason. http://en.wikipedia.org/wiki/Harmonic_balancer PS Really nice 55!
Just a little help on some brackets to make fit on a 265 chevrolet with stock exhaust manifolds. A little modification to the alternater bracket and make new spacers for both sides and it bolts up . The alt. bracket have to cut a little area( see pic ) to clear the manifold and make (4)- 1 3/4" spacers and it will bolt up easy to the manifolds. The a/c bracket you just have to use the other 2- (1 3/4") spacers you made that go between the bracket and the exhaust manifold and it bolts right up . Have the brackets painted right now will post later !
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