Crank pilot bushing hole diameter?
Team Owner
Joined: Aug 2000
Posts: 21,457
Likes: 463
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
Jim, I don't have access to a pilot bushing crank hole, but I measured a brand new uninstalled pilot bushing and get 1 & 3/32". 
Last edited by Paul Borowski; Feb 22, 2005 at 12:10 PM.
Thread Starter
Melting Slicks
Joined: Apr 1999
Posts: 2,521
Likes: 4
From: Windham, NH
Paul,
Thanks for the effort!! I have a new bushing but I need to turn down the outside diameter to fit into a 1960 348 chevy engine I am working on. I need the crank hole diameter of a small block chevy to figure out how much "interferance fit" I need to machine in.
Mike,
I will check the forum later tonight to see what you come up with for a measurment.
Thanks for the effort!! I have a new bushing but I need to turn down the outside diameter to fit into a 1960 348 chevy engine I am working on. I need the crank hole diameter of a small block chevy to figure out how much "interferance fit" I need to machine in.
Mike,
I will check the forum later tonight to see what you come up with for a measurment.
Team Owner
Joined: Aug 2000
Posts: 21,457
Likes: 463
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
Originally Posted by Jim Martley2
Paul,
Thanks for the effort!! I have a new bushing but I need to turn down the outside diameter to fit into a 1960 348 chevy engine I am working on. I need the crank hole diameter of a small block chevy to figure out how much "interferance fit" I need to machine in.
Mike,
I will check the forum later tonight to see what you come up with for a measurment.
Thanks for the effort!! I have a new bushing but I need to turn down the outside diameter to fit into a 1960 348 chevy engine I am working on. I need the crank hole diameter of a small block chevy to figure out how much "interferance fit" I need to machine in.
Mike,
I will check the forum later tonight to see what you come up with for a measurment.
Love those 'ol "W" motors-thought that was one of the neatest looking shapes for heads & valve covers
Thread Starter
Melting Slicks
Joined: Apr 1999
Posts: 2,521
Likes: 4
From: Windham, NH
Paul,
This 348 has been an interesting project, to say the least. Luckly the guy who owns it isn't afraid to spend the money to do it right. It cost $2,600 in parts & machine shop labor to COMPLETELY rebuild the heads, bore block .030" over, hot tank, repl. cam brngs. , turn crank, ect. The Main bearings alone were $192 for the set
!
This engine is a tri-power version and is in a NICE 60 Impala convertible, red w/white top & red interior and is a 4 speed too.
This 348 has been an interesting project, to say the least. Luckly the guy who owns it isn't afraid to spend the money to do it right. It cost $2,600 in parts & machine shop labor to COMPLETELY rebuild the heads, bore block .030" over, hot tank, repl. cam brngs. , turn crank, ect. The Main bearings alone were $192 for the set
! This engine is a tri-power version and is in a NICE 60 Impala convertible, red w/white top & red interior and is a 4 speed too.
Tech Contributor
Joined: Aug 1999
Posts: 15,173
Likes: 3,982
From: Connecticut, USA
Jim,
I checked my 72's crank and it is 1.090" +/- .002" I had to use a set of ID spring calipers to measure, original bushing is 1.091"
Aftermarket, piece of crap, lakewood bushing is 1.095"
Gary
I checked my 72's crank and it is 1.090" +/- .002" I had to use a set of ID spring calipers to measure, original bushing is 1.091"
Aftermarket, piece of crap, lakewood bushing is 1.095"
Gary
Team Owner
Joined: Aug 2000
Posts: 21,457
Likes: 463
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
Originally Posted by Jim Martley2
Paul,
This 348 has been an interesting project, to say the least. Luckly the guy who owns it isn't afraid to spend the money to do it right. It cost $2,600 in parts & machine shop labor to COMPLETELY rebuild the heads, bore block .030" over, hot tank, repl. cam brngs. , turn crank, ect. The Main bearings alone were $192 for the set !
This engine is a tri-power version and is in a NICE 60 Impala convertible, red w/white top & red interior and is a 4 speed too.
This 348 has been an interesting project, to say the least. Luckly the guy who owns it isn't afraid to spend the money to do it right. It cost $2,600 in parts & machine shop labor to COMPLETELY rebuild the heads, bore block .030" over, hot tank, repl. cam brngs. , turn crank, ect. The Main bearings alone were $192 for the set
! This engine is a tri-power version and is in a NICE 60 Impala convertible, red w/white top & red interior and is a 4 speed too.
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Thread Starter
Melting Slicks
Joined: Apr 1999
Posts: 2,521
Likes: 4
From: Windham, NH
Gary,
The hole in the 348 crank is 1.055" and the bushing EVERYBODY keeps giving me is 1.099". The bushing I took out of the crank was butcherd up pretty badly and I am assuming that it was this way because it originally had a Borg-Warner 4 speed and someone put in a Muncie.
Thanks for taking the time!!!!!
The hole in the 348 crank is 1.055" and the bushing EVERYBODY keeps giving me is 1.099". The bushing I took out of the crank was butcherd up pretty badly and I am assuming that it was this way because it originally had a Borg-Warner 4 speed and someone put in a Muncie.
Thanks for taking the time!!!!!
Last edited by Jim Martley2; Feb 22, 2005 at 12:49 PM.
Tech Contributor
Joined: Aug 1999
Posts: 15,173
Likes: 3,982
From: Connecticut, USA
Originally Posted by Jim Martley2
Gary,
The hole in the 348 crank is 1.055" and the bushing EVERYBODY keeps giving me is 1.099".
Thanks for taking the time!!!!!
The hole in the 348 crank is 1.055" and the bushing EVERYBODY keeps giving me is 1.099".
Thanks for taking the time!!!!!
Say Hi to Arlene, you guys plaaning on coming to Moroso's this summer?
Gary
Thread Starter
Melting Slicks
Joined: Apr 1999
Posts: 2,521
Likes: 4
From: Windham, NH
Gary,
I know what you mean by the "powder metal" bushing. The 1st 2 "pilot bushings" Napa got me were that type but had a roller bearing where the input shaft went in. I had seen TOO many trans input shafts destroyed due to these bearing so I won't use them. It's funny, the box that the correct bronze bushing came in had to have 1/16" of dust on it when they set it on the counter!!
We ALREADY have motel reservations at Motel6 in Branford the night before your show!! I don't know which car we will take, but we will be thare.
Jim
I know what you mean by the "powder metal" bushing. The 1st 2 "pilot bushings" Napa got me were that type but had a roller bearing where the input shaft went in. I had seen TOO many trans input shafts destroyed due to these bearing so I won't use them. It's funny, the box that the correct bronze bushing came in had to have 1/16" of dust on it when they set it on the counter!!
We ALREADY have motel reservations at Motel6 in Branford the night before your show!! I don't know which car we will take, but we will be thare.
Jim
