Radiator Problems? - 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 03-19-2003, 02:30 PM   #11
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Where is the sensor that tells the fans to turn on? Would it be possible to put a sensor that would turn them on at a lower temp?
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Old 03-19-2003, 03:04 PM   #12
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Quote:
Originally Posted by brminder
Where is the sensor that tells the fans to turn on? Would it be possible to put a sensor that would turn them on at a lower temp?
If memeory servs me right, it is the same temp sensor that the car uses to display the temp on the dash. The computer just reads the temp and turns the fans on and off as needed. I don't think there is a way to "reset" the marked temps. I know that the GrandPrixStore.com has a kit that givs you a manual override switch for the newer Series II 3800'* but I don't know if the kit will fit older Series I engines. It is just an inline plugin adapter that tells the fans to turn on instead of waiting for the computer to do so.
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Old 03-19-2003, 04:26 PM   #13
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Quote:
Originally Posted by billha
I've never liked how hot both of my Bonnies run. And according to others, what mine do is "normal". You'd think GM would have set the fan trip temps lower in order to cool the engine better. I remember reading the temp trip values in the shop manual, but I don't remember what they are offhand.

Once I drove my '92 to the mountains on a day when the outside temp was around 70 degrees F, and within 10 minutes or so the temp gage was about 1/8" from the red, so I pulled over and opened the hood, expecting to find leaking coolant, but everything was dry and the coolant level was still full, so I continued the trip with the AC on, and the temp went down to around 200 quickly and stayed there. I told a GM mechanic about this trip, and he said it'* "normal" for these engines to run that hot and there'* nothing to worry about, not even at 240 degrees. I've never owned a vehicle that got so close to the red while operating under "normal" conditions!

I'm soon planning to install 180 tstats on both of mine, but I wouldn't be surprised if they both still run at 220 or higher during extended idling ("normal" here in So. Ca.) or on warm 80 or 90 degree days...that'* what both of mine do now, and I assume they both have stock 195 tstats in them.
The episode that really scared me was on a mountain pass. Driving in the snow, about 20 ambient temps, my car overheated. Not a steep grade, either. Did the same thing on the way back. The whole trip was with the 180 installed. I realized on the way back that it was slush blocking some of the openings on the front of the car, including the air gap between the grille and bumber. Cleared out the slush, and it cooled right down. Restricted frontal airflow is a killer on these things, too. With my drilled 180, I don't have this problem any more, and my smaller diameter driving lights may also allow a bit more flow.

I never see the scary temps over 200 any more. We'll see how it reacts in summer weather.
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Old 03-20-2003, 10:22 AM   #14
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When guys have custom chips made, do they lower the temp the fans turn on at?? That would be nice.
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