I have a 72 GS455 4 speed and I took the engine and trans out last year, I do not remember seeing a pilot bushing in the crank. Would it fall out? I have looked at the crank and it does not appear to be in it. Are they pressed in? Where can I get one? Can someone post pics of one? Thanks Tim
are you guys sure that the transmission input shaft is reaching the pilot bearing? Nails use a bushing thats pressed in the larger diameter. then the bearing presses into that. -a
The nailhead pilot bushing is different than a standard pilot bushing. and yes the pilot bushing is a press fit. it shouldnt be able to fall out. Bob
I found my pilot bushing, I forgot that I put it in a bag with other parts. I just pulled it out with my fingers, it slips in and out of the crank with ease, is this normal?
No, that is not normal. It should press in. You need to replace it. I don't know how original your setup is, but I have read in this forum of people turning them down slightly to get them to fit right when they are stubborn. Perhaps this done to yours and little too much material was removed? In any event, it should be pressed or driven in so it becomes part of the crank.
Guys thatv are turning them down are making a mistake . If the bushiong is the right size they need to be pressed in . I usually stick it in the freezer over night and drive it in with an old input shaft and a small block of wood . Never had a problem . If it falls out then it will spin with ther input shaft and theres a problem . Get a new one they are cheap
NAPA number for a bushing is B656. Number for a pilot bearing is B657. Although I would go with the bushing...
you can get them everywhere. I believe that they are the same across most GM models. just make sure you grease the hell out of it, and test fit the input shaft after its in. might require some filing as the brass will roll over very easy.
Here in the U-Shift-Em section search the word pilot. Read all the threads and you will find this has been a fairly common problem and some solutions that may help. I would use a bronze bushing in lieu of the roller for the purpose of if you have a problem and you drive a to large 0.D. bushing into the crank and it distorts the bushings I.D. it will have to be cut out. The pullers designed for this application will break before the bushing comes out due to it being pressed in to tightly. If the motor is in the car i would not hesitate to turn down the bearing instead of removing the engine. we are not talking alot here, about .022" Do not turn the bearing down do equal the crank I.D. you still want a press in fit. Now if the crank is out of the motor by all means machine the crank and not the bearing.
I would buy the correct one . If you have to go oversize then have a machiine shop do the fit . I just pulled one out of my 71 engine . The puller was not working so I have to resort to the old way . Pack grease in the pilot hole and insert a input shaft drive it in using a big rubber mallot stopping to add more grease . This took 10 min . Screwing with the puller 40 min.
The problem is what is the correct one. The only one available is the Chevy piece, at least that is what the aftermarket tell us. Are they the same or did Buick actually have a different O.D. bushing?
