LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1.. 2 or 4 bolt main?

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Old May 5, 2007 | 09:35 PM
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Default LT1.. 2 or 4 bolt main?

Couldnt find an answer...always wondered
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Old May 5, 2007 | 09:44 PM
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4 bolt
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Old May 5, 2007 | 09:47 PM
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F-Bodys 2 bolt
Vette 4 bolt
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Old May 5, 2007 | 10:20 PM
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LS1=6Bolt...batards wouldnt need it if they werent all aluminum!
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Old May 5, 2007 | 10:26 PM
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d & b bodies are all 2 bolt
y bodies are all 4 bolt
f bodies are mixed most have 2 bolt but some have 4 bolt like the cop ones or 1le or a bunch more i think most of the dual cat f bodies are 4 bolt
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Old May 5, 2007 | 10:26 PM
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any police lt1 is a 4 blt
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Old May 5, 2007 | 10:30 PM
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Originally Posted by procamaroz28
any police lt1 is a 4 blt
Good to know!!! I thought it was only vettes.
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Old May 6, 2007 | 10:05 AM
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Alot of replacement engines, replaced under warranty, were 4 bolts. Mine was.
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Old May 6, 2007 | 11:25 AM
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my 97 came with a 4bolt originally from the factory

I have heard that some of the 97s got left over vette blocks that were in a warehouse somewhere
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Old May 6, 2007 | 11:56 AM
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Originally Posted by Captainofiron
my 97 came with a 4bolt originally from the factory

I have heard that some of the 97s got left over vette blocks that were in a warehouse somewhere
I wonder if my '97 may have a 4 bolt main, how do you know?
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Old May 6, 2007 | 01:07 PM
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gotta pull the oil pan i imagine
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Old May 6, 2007 | 01:16 PM
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Originally Posted by Gun5
gotta pull the oil pan i imagine
Unless there is a casting number that might note this, and i doubt it...^ +1.
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Old May 6, 2007 | 01:41 PM
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Originally Posted by Gun5
gotta pull the oil pan i imagine

yea gotta pull it to visually see, the casting numbers are the same

check it out
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Old May 6, 2007 | 03:05 PM
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1LE's are not 4 bolts from the factory... I have one and it's always been a 2 bolt (obviously not anymore)...

just wanted to clear that info up.... alot of leftover vette LT1's were used as GM replacement engines so that's how the 4 bolts ended up in F-bods.... if you got one you were lucky....
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Old May 6, 2007 | 03:10 PM
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well my engine is a new shortblock as of last year... when i bought it. The dealership installed a new shortblock so i wonder what mine is....

i actully hope its a 2 bolt.... cuz i want to do splayed mains.
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Old May 6, 2007 | 04:56 PM
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Originally Posted by OutlawZ
1LE's are not 4 bolts from the factory... I have one and it's always been a 2 bolt (obviously not anymore)...

just wanted to clear that info up.... alot of leftover vette LT1's were used as GM replacement engines so that's how the 4 bolts ended up in F-bods.... if you got one you were lucky....
really my bad i thought 1le were all 4 bolt
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Old May 6, 2007 | 04:59 PM
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Originally Posted by procamaroz28
any police lt1 is a 4 blt
Accept, every 9C1 cop car motor I have seen has been 2-bolt.

Karl
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Old May 6, 2007 | 04:59 PM
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Originally Posted by ZONES89RS
LS1=6Bolt...batards wouldnt need it if they werent all aluminum!
My LSX Block is Iron with them 6-Bolt Mains...that is goin to be 1 tuff mother..
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Old May 6, 2007 | 05:02 PM
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I have a cousin who worked on the production line for them and she couldn't tell me which were which.

I added splayed mains to mine.

2 things- 1 be careful which ones you buy. My machine shop had a big problem with the first set due to the cheap chinese metal.

Second, it was expensive.

after the holes were drilled I could not switch to the more expensive but quality american product due to the different angles 17* American made 18* Chinese. I ended up buy 2 more sets and the second set machined ok.
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Old May 6, 2007 | 05:04 PM
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dang merv, that is a beautiful sight
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