4 bolt LT1

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Jul 14, 2008 | 08:15 PM

irocchenault

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4 bolt LT1

right now i have a stock lt1. any idea on how much it would cost and where to look or go to have it converted to a 4 bolt main. ive never heard a story of the stock 2 bolt go bad even at the dragstrip with 800 ponies. but still. any input whatsoever

Jul 15, 2008 | 07:05 AM

n2ocamaro

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From: Clarksville, IN

Do you mean a totally stock motor or just stock short block. Either way, I wouldn't worry about it till you do a rebuild. You will need to have the block bare to have it done and if your taking it apart down to the block you might as well do a rebuild. You have to have it done at a machine shop. Prices vary. I did splayed 4 bolt caps and I paid $300.00 for machining and $200.00 the caps.

Jul 15, 2008 | 12:10 PM

irocchenault

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yeah it's a totally stock motor still running in the car

Jul 15, 2008 | 02:53 PM

Captainofiron

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what year is the engine?

if its a 97 you might be a lucky one that got a leftover vette block.

my LT1 is a factory 4bolt

Jul 15, 2008 | 04:20 PM

irocchenault

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it's a 96 z. stock 2 bolt.

Jul 15, 2008 | 10:14 PM

smooveZ

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When my stock block developed a piston slap at 30,000 miles my extended warranty was still good so GM replaced the motor. I heard they replaced it with a 4 bolt block.

Jul 15, 2008 | 10:56 PM

Captainofiron

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Quote:

Originally Posted by smooveZ

When my stock block developed a piston slap at 30,000 miles my extended warranty was still good so GM replaced the motor. I heard they replaced it with a 4 bolt block.

I have heard that too

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Jul 17, 2008 | 08:50 AM

FlamingChicken

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that is a good deal. machine work only on mine was 750. thats drill/tap and align bore/hone. forget how much the 3 caps were but they were pro-gram splayed caps.

Jul 17, 2008 | 12:37 PM

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Smokeshow_2006

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while we're on the subject, Im going to hijack a bit.
Assuming ive got a 4 bolt small block with forged rotating assembly laying around, would it be pheasable to take all the lt1 gear, and place it on the 4 bolt block without a crap load of extra work?

Jul 17, 2008 | 01:05 PM

#11

96capricemgr

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The LT1 and gen 1 blocks, while they share basic architecture are not interchangeable.

Far as 4-bolt mains, by the time you actually need them you are better off with aftermarket caps than OEM and there is still a fair amount of machining to change the caps, so don't pretend factory 4-bolt is anything wonderful.