S1 with a leaking upper intake?? - Page 2 - 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 05-04-2006, 02:07 PM   #11
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Allow me to clear up some stuff.

8th character of vin L is the motor designation L27. This is the motor in your picture and is naturally aspriated series 1.

8th character of vin K is the motor designation L36. This is the motor found in 95+ Naturally apirated bonne'* and called series 2.

8th Character of Vin 1 is the motor designation for L67. This is the supercharged motor whether series 1 or 2 Odd they did it this way...but they did.
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Old 05-04-2006, 02:07 PM   #12
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Can he do any year,cyl or make GM injector?
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Old 05-04-2006, 03:23 PM   #13
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Easiest way: L67 has a supercharger, L27 has a black plastic upper intake. I've heard that they can leak (UIM on L27s), while obviously not a common problem like the series to Vin K engines (L36).
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Old 05-04-2006, 03:57 PM   #14
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And I agree, anything is possible. My question then becomes, where is this coolant coming from? Shouldn't all the runners be like this if the upper intake was leaking coolant internally?
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Old 05-05-2006, 01:49 AM   #15
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Quote:
L27 has a black plastic upper intake
I am my 8th character is l so making it l27 but intake is gray/off white make metal intake. I know is because the paint is chipping slight on the back side of the motor
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Old 05-05-2006, 01:50 AM   #16
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You are the exception. Most 92'* had a one-piece intake manifold made of aluminum, rather than an aluminum lower/plastic upper.
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Old 05-05-2006, 12:14 PM   #17
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on the upper intake was or is there a tube that runs to the front of the intake for the PCV vapors? I'm guessing not?

The PCV vaoprs may have gone through Cylinder 1, leaving that runner cleaner... A possibility...

Coolant, well thats a possibility as well, but it doesn't look that way

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Old 05-05-2006, 12:16 PM   #18
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Quote:
Originally Posted by willwren
You are the exception. Most 92'* had a one-piece intake manifold made of aluminum, rather than an aluminum lower/plastic upper.

Yep, I forgot about the 92 L27'*.
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