firechicken_3

iTrader: (4)

i just need to know how tight its supposed to fit in the crank, according to advance auto i got the right one, it fits the trans, and i think it should be a tight fit in the crank so that it won't move, i just want to make sure, before i get out a hammer and start whackin, or do i need to get some sort of press?

Steves91z

It needs to be tight but before you start wacking it put into the freezer overnight. This will shink the part by several thoundths of an inch. I measured it once at .004". When your ready to put it into the car, take it out of the freezer and put it in quickly. If its right you should be able to get it started. Tap it in place and only use the minimum amount of force to accomplish the job. A pilot bushing is soft and hitting it too hard will damage the bushing.

Steve

ede

if you have the little gauge set to recharge your ac soak it with a can of r134 and it'll shrink up a little and it'll shrink up fast, not over nite. way back when before it became so enviromentally unfriendly i can remember using a 30 pound can of r12 on bushings. no wonder the ozone has a hole in it.

Steves91z

Dry ice is another method to use if your in a hurry.

Steve

RICH92RS350

....or liquid nitrogen!
Got some at work, used it for a few things that needed shrunk.
-Rich-

firechicken_3

iTrader: (4)

well guys right now its in the freezer, been there for a day, i'm gonna leave it another day, maybe 2, if that doesn't work i have one of those a/c charge hoses, from my r-134a recharge kit, and some leftover 134a runnin around here somewhere,


edit:

should i move the engine out in the sunlight, so that the crank can expand a little bit? or would it not be enough to matter?

JoelOl75

Yep, warming the crank will definatly help... I use this trick to put the timing gear on the crank. I boil the gear in a pot of water and set the crank outside (winter) or in front of the a/c. Couple light taps and she slides right on.

Nordbert

Once upon a time, long, long, ago there were two or three
different outside diameters of SBC pilot bushings. There is
probably only one size carried in auto supply stores today,
so it shouldn't cause you any problems. Just measure a crank
of any engine like yours, and if the bushing you get is close to that size stuff it into your crank.

firechicken_3

iTrader: (4)

the major reason i asked how tight it should fit is, my buddy had the tranny out of his s-10, that has the iron duke, and he just stuck his finger in the pilot bushing and it came right out, on his finger and then he stuck it back the same way,

RB83L69

They're supposed to be a light drive fit. You just bonk it in there.

The ones that were different sizes were for putting a manual trans behind a crank that had come with a cast-iron Powerglide. They quit that in about 60 or 61, since then they're all the same.

If the one in your bud's S-10 just came out, then it was defective. It had run dry and got sufficiently stuck on the clutch gear nose to spin in the crank, and the outside had worn. They're not supposed to do that.