Drilled T-stat flange - Page 3 - 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 03-07-2008, 10:15 AM   #21
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Originally Posted by shanks
right on as long as i wasn't screwig up my stat/rad i'm happy gonna check the coolant level in the morning as i filled er up a inch above the HOT Fill mark tonight and it dropped to the COLD Line when i last checked... Thanks
It is better for a little coolant to come out of the bleed hole. That shows you got as much air as you could out from underneath the thermostat. You can just wipe off the sealing surfaces with a paper towel before applying the gasket.

Regarding the drop in level in the recovery tank: That'* why we suggest you fill it above the hot full line. That drop is from air that the system expelled through normal cycling. After that first recovery tank fill, you want to bring the level up to the appropriate line and watch it very closely. After several expansion cycles, the level in the recovery tank should stabilize. If not, you have a leak somewhere.
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Old 03-07-2008, 04:54 PM   #22
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brought it up about two inches above the hot and it now stabalized right at the cold line ...Thanks this stuff only gets easier with knowledge...shanks
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