Does anybody have a 94/95 L27 or L67 block nearby? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-21-2008, 01:01 AM   #1
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Default Does anybody have a 94/95 L27 or L67 block nearby?

I'm trying to figure something out. From looking at my parts books I've noticed that most companies list different main bearings sets for the 88-93 Series 1 and the 94-95 Series 1. They say the 88-93 has 1/2" main cap bolts (which my 93 L67 does) and the 94-95 has smaller 7/16" bolts. I don't have a 1994+ Series 1 block around here to confirm this. I do know that the Series 2 3800 has 7/16" bolts.

If anybody has a block around that they can peak at, I would appreciate it.

Thanks,

Chris
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Old 02-23-2008, 02:26 AM   #2
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TTT, somebody must have an old junker S1 around!
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Old 02-23-2008, 11:27 AM   #3
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Bummer for you, the 95 motor went in the car, and the 93 is sitting here on the stand. Backwards of what you want. But I can assure you there are zero differences between the 93 and 95. 94 included.

If there are any differences in main cap bolts, it'll be only on the 92 MAYBE.
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Old 02-23-2008, 12:48 PM   #4
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I've got a 92 L67 block that needs the bottom end torn off...
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Old 02-24-2008, 02:59 AM   #5
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Hey Will, I'll send you an oil pan gasket and a case of beer if you check yours for me!

I am just wondering because of the problem I had getting my ARP main studs. They sent me 7/16" studs the first time even though I gave them the VIN and all the info, which didn't fit because my 93 L67 has 1/2" bolts. So they made me a set of 1/2" studs. I thought the tech I spoke with at ARP was just dumb, until I went looking for main bearings and noticed that the 94/95 listing is different and says "with 7/16 bolts".

Weird. I'd like to figure this out.
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Old 02-24-2008, 12:19 PM   #6
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I think you're mistaken. The engine on the stand with no oil pan is a 93.

Not a 94/95.


I might be persuaded to compare the motors at my next oil change on the Zilla in a couple weeks, but my first instinct would be to suggest you don't use the ARP studs. Nobody here has ever had problems with main or rod cap bearings on the Series 1 before. I can think of better ways to use that money.
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Old 02-25-2008, 12:55 AM   #7
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The only reason I'm using the ARP main studs and rod bolts is that the factory ones are torque-to-yield, and the ARP sets are actually cheaper than new bolts from GM (even with my 50% off). It'* not really a strength issue; I know the Series 1 bottom end can handle more than I'm going to throw at it.
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Old 02-25-2008, 01:50 AM   #8
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My '95 L67 block is in my garage in pieces. If I can help out, let me know. Just let m eknow what exactly you want too see.
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Old 02-25-2008, 02:57 AM   #9
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I'm wondering if you can check the size of the main bearing cap bolts for me. I'm interested to see if they're 1/2" or 7/16" bolts.
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Old 03-10-2008, 01:43 AM   #10
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Last bump. I figured somebody here would have (or has had) a 94/95 L67 apart, but I guess not.
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