Drilling and Taping the crank for a balancer.

[bad64chevelle]

Okay, so on my 327 the original balancer just slides on, no bolt or anything. When it goes back together this time its going to have a balancer with a bolt in it. The short block is still all intact and I really dont want to take it apart since it only have about 2k miles on it. Does anyone know of a machine shop or whatnot that would do this for me? I am going to call Josh tomorrow if he doesnt respond to this before hand. Thanks for the help.


Jon

[The Fixer]

I dunno man. Tapping a hole isn't that big of a deal, as long as you can get the tap started dead straight. But, if that crank doesn't even have a hole in it, you'd better do it with the crank out of the motor. That's a LOT of vibration to drill the hole and it would probably cause unnecessary wear on the bearings, not to mention being able to drill the hole straight and in the correct spot while working around the engine cradle and anything else in the way.

[V]

ATI makes a pinning kit for the LS1 balancer(which i need to do now)
I sure someone makes something to correctly work with your application

[JSPERFORMANCE]

If the crank has a pilot hole in it already it shouldn't be too hard but if there isnt any dimple for location it is going to be extremely hard to get it centered and straight. Not impossible just usually done while the crank is out of the engine thats all.

[bad64chevelle]

I am 99% sure it is dimpled for the sole reason to be able to put a balancer puller on there. I will head down there after class and make sure, anyone have any machine shops they can reccomend?

[JSPERFORMANCE]

A machine shop is most likely not going to do the job without pulling the crank they will want to install the crank in a holding fixture or maybe use a lathe to drill the hole. If you are trying to do this without dissasembly you will probably have to do it yourself.

[johnjzjz]

we had made a tool years back i have not thought about it in a very long time < i looked could not find in shop - but if you have access to a Lathe you can make one - its a block of round steel that presses over the crank end just enough so it has no play and you can get it back off - and it has a pilot drilled .3860 < a W drill bit for taping the hole 7 /16 fine the pilot length was around 2 inches long and that is used as a guide for the drill - go slow and use lots of cutting oil and than tap it with a tapping block against snout for a factoy finish look good luck -- jz