Update on Bonnelicious - 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 09-02-2007, 07:55 PM   #1
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Default Update on Bonnelicious

Ok peeps. Got radiator flushed. Tstat changed from 195 to 180, but didn't drilll it cuz no one ever answered my post regarding drilling, servive eng light went out, but temp still reads 220 help me people!!
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Old 09-02-2007, 10:32 PM   #2
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Well, GM gauges aren't the most accurate things in the world. It'* possible that your actual temps are lower than that.

Or, it'* possible that you've got an air bubble in the system.

Drilling seems like a good idea if you live in an area that'* not too terrible cold in the winter. Up here in Michigan, I think I might drill a small hole, but not anything crazy.
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Old 09-02-2007, 10:58 PM   #3
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Drilling the thermostat facilitates in purging the coolant of air. You can still do it now since you didnt put in the holes, you just have to wait until the coolant reaches the temp at which the thermostat will open. Once that happens, open the screw at the top and let it out. Be careful to.
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Old 09-03-2007, 12:45 AM   #4
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im gonna agree with JMFC on the fact that the gauges are notoriously in accurate. usually in close ball-park range, but rarely on the nose.
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Old 09-03-2007, 10:12 AM   #5
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I've noticed that every gauge'* needle stays slightly elevated with engine off, except for speedometer. The hose from tstat to radiator keeps swelling, getiing hard to press. It was fine after radiator flush and tstat change, but we took it for a quick spin to check out her boost, and we got home and that hose was bulgy and hard. Still don't know where to drill hole in tstat and how big/deep?
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Old 09-03-2007, 10:39 AM   #6
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Quote:
Originally Posted by bonneandclyde
I've noticed that every gauge'* needle stays slightly elevated with engine off, except for speedometer. The hose from tstat to radiator keeps swelling, getiing hard to press. It was fine after radiator flush and tstat change, but we took it for a quick spin to check out her boost, and we got home and that hose was bulgy and hard. Still don't know where to drill hole in tstat and how big/deep?
Drill a coupla 1/16" holes around the rim, not through the central part, 180 degrees apart.
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Old 09-03-2007, 11:43 AM   #7
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Get a scantool on the car and see what the OTHER sensor says. One is for the gauge, one for the PCM.

And yes, you should have drilled.
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Old 09-03-2007, 12:01 PM   #8
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What'* approx. cost of scantool? Hope it comes with instructions lol I mean we like the car so far, but sheesh it'* hard to grasp this supercharger stuff.
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Old 09-03-2007, 12:16 PM   #9
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The supercharger simplifies things immensely. And it has no bearing in this case whatsoever.

http://cgi.ebay.com/ebaymotors/Scan-...spagenameZWDVW
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Old 09-04-2007, 10:46 AM   #10
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Thank you all for your replies. We'll get a scantool as soon as we can.
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