How to tell the Difference? - 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 03-11-2004, 09:47 PM   #1
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Default How to tell the Difference?

Is there a way to visually tell the difference between an early series 1 L67 and a 94?

A yard near a friend has a couple of Series 1'* (blown) out of cars. He does not have 2 years to compare. The yard guys don't know what they came from Are the */c pulleys different diameters? or something else easy to spot?

Thanks for any assistance.
Gary
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Old 03-11-2004, 10:05 PM   #2
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The TB and supercharger are bigger on 94'*. How many are there? if some are bigger then others, then they'll be the 94/95 style.
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Old 03-11-2004, 11:45 PM   #3
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Pulley on the 94/95 is 2.85"
Pulley on the 92/93 is 2.55"

There'* also a slight difference on one corner of the base of the Supercharger below and behind the TB. Anyone remember what that was?

Also, a 92 or 93 will have a digital egr mounted to the front manifold.....looks like a mushroom cap with 3 solonoids. The 94/95 have a linear EGR mounted in the rear manifold.
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Old 03-12-2004, 01:11 AM   #4
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A 92/93 SC base is thicker on the driver side back corner where there is a bolt, ~2", whereas a 94/95 is about one inch.
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Old 03-12-2004, 01:41 AM   #5
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Oh, and the 94/95 EGR still comes from the front manifold, but it is the linear type, just one round solinoid.

Mine, 92 L67, EGR with missing mushroom cap:


Gordy'*, 95 L67 (if he doesn't mind):
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Old 03-12-2004, 02:00 AM   #6
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Gotcha. And your cover is missing. Look at my sig pic for the pontiac logo. Stock cover is black, though.
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Old 03-12-2004, 02:02 AM   #7
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When did they start the black oil filler cap? Was that 94?
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Old 03-12-2004, 03:02 AM   #8
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I meant the digital EGR cover. Yours should be identical to mine, only black. I need a replacement too. Mine broke, and I laser welded it, then painted it. Up close, you can still tell.
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Old 03-12-2004, 03:22 AM   #9
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I know, I was bringing up another difference.

My EGR cap was missing when I bought the car.
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Old 03-12-2004, 09:17 AM   #10
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the throttle body opening is also a little bigger
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