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 Post subject: Crank Journal Sizes?
PostPosted: Sat May 23, 2009 6:13 am 
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Turbo EFI
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Got a crank that was reground from the machine shop. One journal IMO is way off. I was told it was .030 under. Yet there is a stamp on one of the counter weights .020. All are really close to each other.

Just wanting to make sure I have the right bearings before I drop it in to the engine to plastigauge it and open bearings that I may not need.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto :-( Dually Clubcab needs a injector pump
2005 Golden Couch Buick


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 Post subject:
PostPosted: Sat May 23, 2009 7:08 am 
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Turbo EFI
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Never mind! Found some books and looks like the mains are OK rods are .060 under. So I think I paid for a POS that needs the journals welded and ground.

Gonna have to recheck my numbers.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto :-( Dually Clubcab needs a injector pump
2005 Golden Couch Buick


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 Post subject:
PostPosted: Sat May 23, 2009 10:13 pm 
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Turbo EFI
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Rechecked, the rods are .060. I don't think they make bearings that size.

_________________
'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto :-( Dually Clubcab needs a injector pump
2005 Golden Couch Buick


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 Post subject:
PostPosted: Sun May 24, 2009 5:26 am 
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Talk to Zilla or Doc they have both found them if I remember correctly. There was a discussion on this a couple of years ago. It might have been in one of the engine build threads???
Frank

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 Post subject:
PostPosted: Sun May 24, 2009 6:57 am 
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Must have been Doug, I don't remember ever even looking for a .060 under bearing. :shock:

I am pretty sure a decent machine shop could find them though.

Rug, the crank in my good motor is a Car Quest reground kit. IIRC I paid around $200 for it and it has been indestructible.

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 Post subject:
PostPosted: Sun May 24, 2009 7:22 am 
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Turbo EFI
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When I took mine down to the shop they told me one main needed welding and reground as it was @ .060. Price was $70+$70 for the one journal. The rest would finish up @ .030. Luckily they had a crank that was not claimed for $70. Makes me mad that I drove 25 miles one way to get this.

They didn't do my head. I did have them do a friend's head. They guy that did the valves was a smart ass.

_________________
'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto :-( Dually Clubcab needs a injector pump
2005 Golden Couch Buick


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 Post subject:
PostPosted: Sun May 24, 2009 8:45 am 
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Personally, I wouldn't accept a .060 crank, unless I specified, that is what I wanted. That said, Sealed power engine parts catalog shows a .060 rod bearing 6-2375CA60 "unplated & resizeable". Main bearings 4092M only to .050. This is for the forged crank. The cast crank has rods and mains listed to .040 only.

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 Post subject:
PostPosted: Sun May 24, 2009 8:50 pm 
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Turbo EFI
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Here is my measurements. I took 2 on each journal.

Mains Rods

1. 2.721 X 2 1. 2.129 X 2.1211"
2. " " " 2. 2.129 X 2
3. 2.7215 X 2 3. 2.1285 X 2.1830"
4. 2.721 X 2 4. 2.1270 X 2.1276"
5. 2.1285 X 2.1280"
6. 2.12875 X 2.129"

I don't know if these numbers are out of round too far?

_________________
'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto :-( Dually Clubcab needs a injector pump
2005 Golden Couch Buick


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 Post subject:
PostPosted: Mon May 25, 2009 10:58 am 
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Turbo EFI
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What is the out of round specs?

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto :-( Dually Clubcab needs a injector pump
2005 Golden Couch Buick


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 Post subject:
PostPosted: Tue May 26, 2009 6:21 am 
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I wouldnt except anything more than .001.
Frank

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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered


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