Cavu2u

Belgian1979vette

The advice was well meant.

Good luck.

Haggisbash

Wow, I really feel for you, but I'm glad I have been following this thread as I may have to pull my own balancer for the same reason. I think the timing marks have walked because the timing light is telling me that the engine is running over 45 deg advance at idle with the vac advance disconnected. No detonation, nothing sooooo.
I guess with the balancer heated and some freeze spray on the nose of the crank the thing should practically fall on? Wonder how hot the balancer can be before the bonding of the rubber gives out?

Cavu2u

You know, I'm not really convinced a warm HB would go on much easier than an unheated one. First, you can't really get it hot, because of the elastic setting of the outer ring. Second, by the time the HB is a quarter of the way on, heat sink action will have chilled the HB down to the crank's temp. The interference fit of the HB to the crankshaft is significant (nice way of saying it's real fuc#*n' tight). I am spending the extra $$ and getting a better tool to install this HB........... once I get the busted stud out.

Steve

Haggisbash

I used to put bearing races on shafts back in the day, we used an induction heater to heat them and it was very effective in making them drop on v's push fit. Can't recall what the temp was though.

Cavu2u

Hot/cold is also how I install wheel bearings on V4 Honda motorcycles. The bearings go in the freezer, and right after I heat up the hub with a propane torch, they drop right in with hardly any encouragement.

Cavu2u

Any ideas?

REELAV8R

You leave the HB in the oven for 25 minutes. That gets it good and heat soaked. 250* doesn't seem to bother the rubber compound.
The difference on mine was the interference was reduced from .004" to .001". I measured it.
You have already proved can happen when you don't use heat.
Anther guy recently was able to drill his broke bolt out by making a collar that fit around the shaft wit a hole in the center. He then drilled incrementally larger holes until the bolt was free to come out.
That bolt is pretty hard. Not easy to drill.
Maybe you can use a Dremel and a small grind stone to get a groove that you can tap on to walk it out.

zwede

Yeah, that would be my approach also: A good dremel (the corded, strong one) with a small cut-off wheel. Cut a groove and use a flat-bladed screwdriver.

Cavu2u

Very true.

Garys 68

Center punch good and hard. Will give you a mark to drill and knock it loose some.
Reverse drill bits if you have them. Drill it all the way through (important) before trying an easy out. Lots of penetrating oil and try the easy out. Don't break the easy out in there. If it wont move, keep increasing the drill bit size and easy out size.
Also heat,the balancer, cool the crank. You can buy dry ice for about $1/lb and have some leftover to make some fog.

MrJlr

As a machinist for 25 years, left handed drill, low rpm, lots of pressure.
Also heat it up if you can.

Cavu2u

Soakin' it for a while.....



..in this stuff.

Cavu2u

With a little help from the worlds smallest chisel...



..it spun right out!



I learned a stud broken by stretching is a helluvalot easier to remove than a stud that broke due to over torque. On the first tap from the chisel, it moved. I was so relieved.

Lesson learned.

And THANKS for all the ideas.

Steve

P.S.: Now perhaps I can get back on track with the thread's title!

Garys 68

Wow, you got lucky.
Consider the dry ice on the crank, I use it for transmission press fits.
A 300 degree differential in thermal expansion makes parts fit easily.

Haggisbash

There was a silver lining on that cloud for a change!

REELAV8R

Get the paint off the crank snout where the balancer has to slide over it, it increases the diameter of the crank snout.
Make sure you grease the seal or outer diameter of the balancer where it contacts the seal or it can burn up your seal quickly if it is run dry.

Cavu2u

Will do.

What?: 250 degree oven temp OK for the Harmonic Balancer?

Where?: Dry ice purchase?

Cavu2u

Haggisbash

You can buy an aerosol can of freeze spray which should do the job, electrical parts suppliers and the like often have it.