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52 model 250 327 engine
#1
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Morty
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Hello , currently working on a 52 327 engine
Its at tbe machine shop and my tech is looking for
The block crank bore diameter anyone hav this spec
Thsnks Morty

Posted on: 8/29 16:53
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Re: 52 model 250 327 engine
#2
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JeromeSolberg
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Look in the "specifications" part of the 1951-54 Service manual, right here:

https://packardinfo.com/xoops/html/mod ... ?op=&catID=10&ContentID=4

Posted on: 8/29 17:01
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Re: 52 model 250 327 engine
#3
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Morty
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Thank you ,
I have a factory service manual and that spec is not there .
Its the diameter of the block main brg circle with no bearing in it
They use this measurement to check for crank alignment and they will hone the journal bore to make it straight

Posted on: 8/29 17:40
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Re: 52 model 250 327 engine
#4
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PackardDon
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With the bearings in-hand, it should be easy to figure out. Strange they are having the issue as I've had a number of Packard engines rebuilt and line-bored in the process and the question never came up!

Posted on: 8/29 17:46
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Re: 52 model 250 327 engine
#5
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Owen_Dyneto
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You should be able to arrive at that dimension knowing the crankpin diameter, bearing clearance and bearing shell thickness. You might also need to make an accommodation for the bearing shell "squish".

Posted on: 8/29 18:06
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Re: 52 model 250 327 engine
#6
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humanpotatohybrid
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There are stats in the 51 manual here https://packardinfo.com/xoops/html/mod ... ear&catID=24&ContentID=60

Just check if it's the same engine

Posted on: 8/29 18:12
'55 400. Needs aesthetic parts put back on, and electrical system sorted.
'55 Clipper Deluxe. Engine is stuck-ish.
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Re: 52 model 250 327 engine
#7
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Duncan Michael
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Main bearing housing bore diameter for
your engine is 2.9355-2.9360.

Posted on: 8/29 18:35
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Re: 52 model 250 327 engine
#8
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Morty
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Thank you everyone and thank you Duncan
Thats what i was looking for

Posted on: 8/29 19:15
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