Pilot Bushing -66 Olds 442 400ci
#1
Pilot Bushing -66 Olds 442 400ci
I’m converting a 66 442, 400ci engine from an automatic to a four speed. The machine shop had the back of the crank drilled to accept a pilot bushing (bronze not a sealed roller bearing). This was before I found out that there is a conversion bearing that does the same thing w/o drilling. They also couldn’t find the correct bushing. I had to source it.
Depth of the drilling is .495 deep. Thickness of the bushing is.358. Is this o k to use? I’m assuming as long as it is flush on the face, it doesn’t have to go all the way in to the .495 depth..
The o.d. Is 1.382”. I tried to install the bushing but it was not going to go in easy…didn’t want to force it. May have to take something off the bushing or enlarge the bore. Either way it won’t take much…..0.001-2 maybe.
The I.d.is .0.582 which fits the M20 shaft perfect…not tight, but just a smooth spin.
Does anyone have any thoughts/experience with on this?
Tom
Depth of the drilling is .495 deep. Thickness of the bushing is.358. Is this o k to use? I’m assuming as long as it is flush on the face, it doesn’t have to go all the way in to the .495 depth..
The o.d. Is 1.382”. I tried to install the bushing but it was not going to go in easy…didn’t want to force it. May have to take something off the bushing or enlarge the bore. Either way it won’t take much…..0.001-2 maybe.
The I.d.is .0.582 which fits the M20 shaft perfect…not tight, but just a smooth spin.
Does anyone have any thoughts/experience with on this?
Tom
#3
I’m converting a 66 442, 400ci engine from an automatic to a four speed. The machine shop had the back of the crank drilled to accept a pilot bushing (bronze not a sealed roller bearing). This was before I found out that there is a conversion bearing that does the same thing w/o drilling. They also couldn’t find the correct bushing. I had to source it.
Depth of the drilling is .495 deep. Thickness of the bushing is.358. Is this o k to use? I’m assuming as long as it is flush on the face, it doesn’t have to go all the way in to the .495 depth..
The o.d. Is 1.382”. I tried to install the bushing but it was not going to go in easy…didn’t want to force it. May have to take something off the bushing or enlarge the bore. Either way it won’t take much…..0.001-2 maybe.
The I.d.is .0.582 which fits the M20 shaft perfect…not tight, but just a smooth spin.
Does anyone have any thoughts/experience with on this?
Tom
Depth of the drilling is .495 deep. Thickness of the bushing is.358. Is this o k to use? I’m assuming as long as it is flush on the face, it doesn’t have to go all the way in to the .495 depth..
The o.d. Is 1.382”. I tried to install the bushing but it was not going to go in easy…didn’t want to force it. May have to take something off the bushing or enlarge the bore. Either way it won’t take much…..0.001-2 maybe.
The I.d.is .0.582 which fits the M20 shaft perfect…not tight, but just a smooth spin.
Does anyone have any thoughts/experience with on this?
Tom
#5
Ok,
I guess I am wrong. I found my drawing and the pilot bearing hole is indeed 1.380 It should be a fairly tight fit though. Here is the post on this site from a while back:
https://classicoldsmobile.com/forums...ushing-163381/
What is strange is most of my books are calling for the same part number bushing as Chevy.
I guess I am wrong. I found my drawing and the pilot bearing hole is indeed 1.380 It should be a fairly tight fit though. Here is the post on this site from a while back:
https://classicoldsmobile.com/forums...ushing-163381/
What is strange is most of my books are calling for the same part number bushing as Chevy.
#6
There are 2 sizes of bushings, and they went big. Probably need this one:
https://www.summitracing.com/parts/mcl-8-1380-1
https://www.summitracing.com/parts/mcl-8-1380-1
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