Thread: 55 Chevy balancer installation

Tweet

Originally posted by pat mccarthy
very entertaining .i have put them on with a 2by4 the old small chevy bal with a hammer. but getting up to 220 or so sounds good to me. we do this on heads to put guides in and works good and .007 is past the pess so it should go on smooth but i like to beat the hell out of the small block with a 2by4 and a hammer what do i used the hammer and 2by4 on now ?

ive never replaced a lot of guides, but looks like cooling them would be the way to put them in.

[ i like to beat the hell out of the small block with a 2by4 and a hammer what do i used the hammer and 2by4 on now ? [/B]

I keep an old F@#d block around for that purpose.

Originally posted by DennyW
Well, I'm not done yet ! I want to know if you measured the crankshaft snout ? .007 thousandths sounds fine, but what was the crankshaft snout size ? And was that .007, or .0007 tenths ? Once we know that, we can go from there. To be continued.

I didn't measure the crankshaft snout, cuz I was only interested in knowing how much the balancer would expand, if any. The difference between the cold measurement of 1.236" and the hot measurement of 1.243" is .007", i.e. seven thousandths of an inch. I did take each measurement twice just to double check my accuracy.

harley heads aluminun

nice to see you moveng denny . 007 seam to tall i think .0007 is rigth should be pess is no more than .002???

Originally posted by DennyW
Thanks Pat. Yep about 7 10ths would be a good press fit. He said the pully (balancer grew 7 thousandths), but that's not really what is important. The fit between the 2 is what's important.

of all the HB ive knocked on no 2 took the same effort and most of the one's that was hard to knock on was one somebody had messed up some time or another. i used to get them off without a puller, so they couldnt be on there but so tight.

Originally posted by DennyW
Well, that's fine if you want to do it like that, but the builders always take that measurement. It is important to have the right amount of press fit. Some shafts and balancers have a slight taper, did you know that ? So, the measurements are usually taken in the middle for acuracy. Half thousand to 1 1/2 thousandths is general rule. higher rpm's a little tighter on the press fit. And always make sure the key fits in the keyway good, with at least a half thousandth top clearance.
Now where did I lay lub, my 2x4, and bfh ?

I don't doubt you, but I'm just doing a Rustoleum rebuild on this motor, not a complete blueprinting job. As far as I can tell, this is the original balancer for this engine, so it's stayed on for 50 years, more or less (may have been removed at some time for engine rebuilding I guess, but I don't know the history of the engine), so the clearances are probably okay. Anyway, it was running okay when I pulled it out to clean it up and paint it, so I'm not planning any mechanical work on it -- just make it purty and put it back in. All I wanted to do was expand the hole a bit temporarily so it would go on easier.