Are 1999 series 2 N/A immune from intake problem? - 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 05-23-2004, 03:57 PM   #1
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Default Are 1999 series 2 N/A immune from intake problem?

The reason I ask went to Ken- Co Industies site and they did not list a fix for the 1999. Do SSEI'* have same problem?
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Old 05-23-2004, 08:09 PM   #2
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art, The '99 series II N/A (vin k) engines are definitely susceptible to the upper intake failure. The equivalent series II supercharged engines do not have the composite upper intake manifold. The supercharger itself is aluminum, and the egr discharge pipe is arranged differently. No, the SSEi'* are not affected by the upper intake failure.
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Old 06-08-2004, 01:21 AM   #3
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Hi
I see this post is fairly old, but I hope you don't mind me "throwing in my 2 cents worth."

Yes, I can say for sure that the '99 Series II, VIN "K" (normally aspirated) is succeptable to the famous failures. At just under 90k miles, my '99 Bonneville series II failed. -BOTH the upper intake (due to bad EGR design) and also the lower intake gaskets failed too, dumping the coolant into the engine oil.

And yes, there is an aftermarket "fix" for the bad EGR design.

By now, you have probably read the other posts related to the intake/coolant failures.

Harry
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Old 06-08-2004, 01:22 AM   #4
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Hi
I see this post is fairly old, but I hope you don't mind me "throwing in my 2 cents worth."

Yes, I can say for sure that the '99 Series II, VIN "K" (normally aspirated) is succeptable to the famous failures. At just under 90k miles, my '99 Bonneville series II failed. -BOTH the upper intake (due to bad EGR design) and also the lower intake gaskets failed too, dumping the coolant into the engine oil.

And yes, there is an aftermarket "fix" for the bad EGR design.

By now, you have probably read the other posts related to the intake/coolant failures.

Harry
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Old 06-09-2004, 11:19 PM   #5
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Quote:
Originally Posted by 57chevythunder
At just under 90k miles, my '99 Bonneville series II failed.
Mine too - exactly the same thing.
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