electric fans

i was wondering what temp the electric fans come on. I recently did a new radiator and T stat and has new coolant temp sensor in water pump but the fans dont come on till it is about to overheat, but only gets hot if idleing for a while.oh yeah and the a/c is completely removed

LT1 Cooling

boojum wrote:

LT1 Cooling

that's was great write up. Good post. I read the whole thing on our trip down to Newport beach today. Learning has occurred:)

alot of reading lol but thank you for the correct answer about temps. now either i gotta program the pcm the turn on lower temps or put a switch in and run them manually.

Jet performance makes a temp switch kit (purchase through Summit Racing) that installs a temp switch in the left cylinder head (in place of an existing plug). The temp
switch is then wired to both the primary and secondary fan relays on the distribution box on the right inner fender to automatically turn the fans on at the lower temp
(I think 190-195 degrees). I've installed this kit without any problems and without any check engine codes. I did put in a toggle switch in-line to disable the extra temp switch,
but never really use it. I keep the circuit on all the time without problems, and my in-dash temp gauge never goes past the mid-point. -Joe

thanks for the info think im just gonna go with the switch since the only time i need em is in heavy traffic.

Just in case, I looked up the kit number. It's Jet Performance # 60604. -Joe

all set I guess I still had some air pockets in there. Primary fan came on before it got to the red.

I posted this on gmlongroof before reading this. Now I'm not sure if I just didn't let the engine get hot enough for the fans to come on? I was hoping tomorrow would be my first commute in the Caprice, but I have a meeting and I spend way too much time on 128 to risk overheating. Here's the longroof post:
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I took the '94 Caprice out for its first test run since buying it last week. Nothing too bad, except the temperature gague. It's a bit left of center on the highway and straight up on local streets, which is about what I would expect. I let it idle while filling up with gas in case it wasn't going to restart, and I noticed when I got in that it was about 3/4 of the way up the operating range. Not too much of a concern, and it went right back to left of center at highway speeds.

Got home and let it idle in the driveway for a bit, and it started creeping up. I shut it off when it got the upper end of operating range and didn't let it overheat. The whole time, I noticed that the dual electric fans didn't kick in, meaning outside air was doing all my cooling. One of the top bolts that holds the fan assembly on is missing, but the electrical connections and fuses look OK. The car used to have a mechanical fan; the electrics were put in two owners ago. Anything else I should check before hauling it into the shop?

Guess I was being paranoid; the primary fan came on when it was about 90% of the way up the operating range.