'98 Bonneville gauges bounce irradically and no heat. - 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 01-13-2006, 06:33 PM   #11
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Well, my car started to sputter and would not accelerate very well and it kept reving up really high and still not getting anywhere. So I was checking my gauges making sure everything was ok and nothing was moving in any way. A few minutes later I was checking the gauges and the temp was spiking really high so I pulled it over and let it cool down for a while. I checked the radiator and the overflow tank and they were both low and it smelled like burning antifreeze. I checked underneath the car and there were no leaks anywhere. So I poured more antifreeze in it and it took the rest of the bottle (2/5ths) and it still didn't get it high enough to fill the overflow tank to the cold line. So I started it up and it was putting out a lot of white smoke while it was idling and when the pedal was down. I got it towed to a shop to have them fix it and the guy said it sounded like an intake manifold gasket and plenum (I don't know if that is how you spell it or not, sorry). So yeah, I get to spend top dollar on getting my baby fixed. Any other suggestions of what it could be possibly or is that just straight forward? Is this a common problem???
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Old 01-13-2006, 06:41 PM   #12
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Your mechanic hit the nail right on the head. Your upper intake manifold took a puke. While they're doing the job, spend the extra few bucks and have them replace the lower intake manifold gaskets and coolant by-pass elbow. It'* great insurance to have those freshened up, too.

AND, drain that oil immediately. The antifreeze will eat up your bearings.
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Old 01-14-2006, 01:07 PM   #13
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Just like Vital said... spend the $$ and have the lower intake gaskets replaced with the coolant bypass elbow... Make sure they get the Fel-Pro or GM second generation gaskets... They will have metal spacers to avoid over torquing the gaskets

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