LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

How can you tell if you have a four bolt main block?

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Old 09-18-2004, 12:38 PM
  #16  
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Re: How can you tell if you have a four bolt main block?

Mine was a 2 bolt, but not anymore!
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Old 09-18-2004, 08:51 PM
  #17  
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Re: How can you tell if you have a four bolt main block?

I will look at block as shoebox showed. motor was said to come out of 94 cop persuit car from texas. if it is so must be #2 motor in car cause no ID can be found in normal spots
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Old 09-18-2004, 11:45 PM
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Re: How can you tell if you have a four bolt main block?

Originally Posted by 2MCHPSI
One would think that but there are some f-bodys that came with 4 bolts.

Only one I personally know of from working at the Pontiac dealer. Customers car had a 4 bolt block.. I know it was the original engine because I had worked on it since new, owner always took it to me for work. Bought the car with 4 miles on it.

I have heard one other tech I know at another local dealership that found a 4 bolt f-body from the factory.. wierd huh.
I heard that a few 93's came with 4 bolts because they had some extra vette blocks for that year.

Jason
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Old 09-19-2004, 03:00 AM
  #19  
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Re: How can you tell if you have a four bolt main block?

Originally Posted by 2MCHPSI
One would think that but there are some f-bodys that came with 4 bolts.

Only one I personally know of from working at the Pontiac dealer. Customers car had a 4 bolt block.. I know it was the original engine because I had worked on it since new, owner always took it to me for work. Bought the car with 4 miles on it.

I have heard one other tech I know at another local dealership that found a 4 bolt f-body from the factory.. wierd huh.
Ya i have seen 2 different cars with original motors and 4 bolts. Its kinda like the ls6 blocks in some ls1 cars. Random crap Gm had and threw in to get the product out on time or just to move stock.
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Old 09-20-2004, 12:50 AM
  #20  
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Re: How can you tell if you have a four bolt main block?

here read this, it pretty much sums it up

http://www.automotiverebuilder.com/ar/ar99928.htm
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