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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 02-07-2010, 06:01 PM   #1
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im looking for a cheap car to become my DD. so i found this 97 grand prix that has been overheated. and they say it has a knocking sound in the top end. they fixed the cause of it overheating the rad. their asking $1000. is this an easy fix? can i drive it like this ? what is it ?

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-josh

Edit: its only a gt
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Old 02-07-2010, 06:11 PM   #2
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sorry posted in wrong section. please move it
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Old 02-07-2010, 06:25 PM   #3
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Depends on what is knocking. If it'* a rocker it could be a stuck lifter. If the knock is the lower end, it will need a new engine.
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Old 02-07-2010, 07:53 PM   #4
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they said theres no coolent in the oil.
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Old 02-07-2010, 11:28 PM   #5
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how would overheating cause this ?
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Old 02-07-2010, 11:31 PM   #6
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Depends on how over heated it got. You could cool the pistons and rings. The pistons are aluminum. It'* really hard to say what is wrong not being there and having never heard the engine. It could be as simple as a stuck lifter, fixed by a little seafoam, or as bad as a spun bearing, resulting in a engine swap.
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Old 02-07-2010, 11:40 PM   #7
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thanks
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Old 02-08-2010, 03:13 AM   #8
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I've overheated my L27 3 times. Once at 90k miles when the water pump went for the first time, and the temperatures just barely hit the red mark. The second time at 180k miles when one of the fans stopped working on a very hot summer day, where the temperature was 2 gauge marks below the red line, and again at 206k where it once again stayed two gauge marks below the red line when my thermostat got stuck closed. None of those caused any damage except for the last time, when it warped my upper intake manifold a bit around the throttle body coolant passages, which ruined the gasket and caused a small coolant leak when the engine was cold. I fixed that using some sealant and a new gasket, and all'* been well for the last 7k miles. That'* just for comparison purposes as to overheating damage.
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Old 02-08-2010, 05:57 PM   #9
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thanks but they way he talked it pegged the needle in the red.
weve overheated the LSS once due to crappy rad, it got half way in the red with no damage.

Last edited by oldsmobile99; 02-08-2010 at 06:02 PM.
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