clutch help ( pilot bearing)

[blazinzuk]

Are there cranks out there that won't accept a pilot bushing. Working on a Toy with a small block in it and a 465/205 no I have a hole in the crank that tapers in a bit but is twice as wide as the pilot bearing.



I is confused

 

[blazinzuk]

Note to self recalibrate my eyeball. Confused me as there was no pilot bearing in it. I am an idiot

 

[colbystephens]

Good times. I'm sure we've all had those sort of moments!

 

[4X4HIGH]

Are there cranks out there that won't accept a pilot bushing. Working on a Toy with a small block in it and a 465/205 no I have a hole in the crank that tapers in a bit but is twice as wide as the pilot bearing.



I is confused

Yes there are, i've run into a couple over the years. I know you made a mistake but YES there are some out there that the hole wasn't machined to accept a pilot bearing.

 

[mr250twostroke]

Ha! When I swapped to a manual I went to put the bushing in and thought $hit, this ain't gonna fit. Well it already had a bushing in the crank

 

[yellowK20]

Yes there are, i've run into a couple over the years. I know you made a mistake but YES there are some out there that the hole wasn't machined to accept a pilot bearing.

Just out of curiosity , what were they? Eric and I were talking about it and I knew there were some non drilled cranks out there but I'd never seen one

 

[Fordum]

Just off the top of my head, I would expect they were for engines that were only going to be used for an automatic transmission.

 

[yellowK20]

Just off the top of my head, I would expect they were for engines that were only going to be used for an automatic transmission.

haha yeah, but the thing is there really isn't a small block I can think off that wasn't offered with out a manual trans .

 

[4X4HIGH]

Just out of curiosity , what were they? Eric and I were talking about it and I knew there were some non drilled cranks out there but I'd never seen one

The couple i'd run across were just 70's 350 engines. I've also run into a few that the hole was so small you could not use an automatic trans because the torque convertor nub would not fit the crank so on those I had to chuck them in the lathe and open the hole to the proper size.

 

[blazinzuk]

The couple i'd run across were just 70's 350 engines. I've also run into a few that the hole was so small you could not use an automatic trans because the torque convertor nub would not fit the crank so on those I had to chuck them in the lathe and open the hole to the proper size.

I am glad to see that I am not totally crazy LOL

I was tearing my hair out over this. Its a guy I am doing some work for and while his truck was in the garage he asked if he could do his clutch. No problem I said.

So when he got everything off there wasn't one there my mind assumed the worst.

Finally after chatting with Gus for a bit I went back out to take a pic and grabbed the bearing to put it in the hole so everyone could see how much bigger the hole was than the bearing by dang if it didn't fit.

Judging by the crud in the hole I bet there hasn't been one there for a long long while.

 

[yellowK20]

Hopefully the input bearing isn't wasted from that

 

[blazinzuk]

Hopefully the input bearing isn't wasted from that

I cleaned it out pretty good.

 

[gonefishin]

If I remember correctly the 472 and 500 caddy will not take a pilot bearing

 

[diesel4me]

True ,the caddy engines were never offered with a manual tranny!....how many caddy owners wanted a 4 on the floor?......you can drill the crank to accept one I have read,but I dont think I'd try doing it myself...I would think it'd be easy to muck it up and not have it turn out well...

 

[4X4HIGH]

True ,the caddy engines were never offered with a manual tranny!....how many caddy owners wanted a 4 on the floor?......you can drill the crank to accept one I have read,but I dont think I'd try doing it myself...I would think it'd be easy to muck it up and not have it turn out well...

That is why you dont drill it but rather chuck the crank in a lathe and machine the hole (obviously the engine has to come apart for this).

 

[yellowK20]

The couple i'd run across were just 70's 350 engines. I've also run into a few that the hole was so small you could not use an automatic trans because the torque convertor nub would not fit the crank so on those I had to chuck them in the lathe and open the hole to the proper size.

marine engines by chance??

 

[Fordum]

That is why you dont drill it but rather chuck the crank in a lathe and machine the hole (obviously the engine has to come apart for this).

Actually, believe it or not, you would not necessarily have to take the engine apart to do that.
It would be best, of course, but the tool and die shop I do consulting work for from time to time, has a vertical lathe that is big enough you could put an entire engine on the turntable and spin it if you wanted to.