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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.

Best way to flush cooling system 92 Olds 88?

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Old 07-28-2018, 05:17 PM
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Default Best way to flush cooling system 92 Olds 88?
Would this work good? Take off the upper radiator hose, remove the thermostat and replace the housing, pour water into the radiator and it will come out the thermostat housing.
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Old 07-28-2018, 07:13 PM
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That'* what I ended up doing to my Regal a bit back. I am just not sure how good it will get the heater core.
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