Fist time poster here - interesting story, I bought this 91 RS last week from a guy at work (my first Camaro). It didn't run, I offered him $100, he sold it to me. I checked it out, turned out to be the distributer cap. $12 later, I own a running Camaro. Not bad eh? Anyway, this is my first American car, never worked on a V8 before, never been under the hood of a Camaro... searched some cooling threads and didn't see this; car overheats when it idles (has a new raditor and thermostat). everything seems to work but the fan doesn't run. With A/C or defrost on fan runs. I checked the fan relay, seems to work. there's a sensor on top of the intake manifold. Is that the fan switch? If not, where should I go from here? where's the fan switch? There are a few connectors laying on the intake manifold that aren't hooked up. Dont know what they go to. Also, there's a brass fitting in the radiator with nothing in it. Fan switch go there? Any help would be great. -Hondahater-

lol bitching good deal bro! idk how to help sorry

I certainly can't help with the problem at hand, I have very little experience with cooling systems in general, but I do see one problem. Put that pressure washer away, it has nice paint, and even at a low pressure, it'll ruin the paint.

Blasting around dirt is a no no, wash it with a garden hose, hardly any pressure at all, no sprayer attachments, let the water sheet over, and you'll be amazed at the results. (Although I shouldn't be saying that, I have a picture on Car Domain where you can see a sprayer, I got lazy at the time. LOL.)

Sorry to get off topic, but I had to. BTW, congrats on the new Camaro, you scored the deal of a lifetime.

Damm I will give you $120 for it! haha

Anyways I do think the fan switch is on the intake manifold. My car has a similar problem and I just have to set the AC on ''Norm'' setting and fan turns on. I know its a $10-20 fix but I am lazy. Also I could be wrong but a few friends over here told me thats it.

Damm I am still saying wtf to myself that car for $100 is an insane deal.

Welcome to Third Gen & congrats on the great deal!

You mention that the car is a V-8 and it is an RS, so I am going to guess that it is TBI. I don't know as much about TBI as TPI, so I won't make any guesses for you, but the wiring diagram below may help. Also, the Coolant Temperature Sensor is usually located on the front of the manifold and should have yellow and black wires going to the connector.

Best of luck and if you can't get it working and aren't too far away, I'll be happy to double your investment on the car

The cooling switch on my sons 92 RS is on the right side of the engine block under the exhaust manifold, It is a brass switch screwed in to block.That was a cool deal you got on the camaro.

Fan switch is in pass side head between #6 and #8 plugs. Watch for the coolant in the face when you change it out. Until you get to it, just turn on the A/C when car gets warm.

Congrats. on the great find. $100 is a steal for that ride. Take care of her and welcome to the world of third gens. You'll get the bug before long as well!

Welcome to TGO. Your fan temp switch is located on the right (pass side) cylinder head, as stated above. If your fan is turning on with the AC switch then the relay is fine. Find the switch and pull the one-wire connector off. Ground the connector (you may have to use a jumper wire to reach the lead in the plug) to the engine or another ground source with the engine in run and the fan should turn on.

You didn't say if the coolant was boiling over or not. The factory temp switch will allow the motor to run pretty hot before it comes on. Do not assume the dash temp guage is an actual indication of the coolant temp. It's notoriously inaccurate. If the radiator is not boiling over into the reservoir, it's not overheating.

If it's boiling over and the fan switch isn't coming on (and the switch wire is connected) the most likely cause is a bad radiator cap.

238°F

AC Delco D1855B (or equivalent) fan switch. 215°F turn on temp. Autozone has their brand (p/n sw505, I think) for $10

Ive found that Kragens offers fan switches that will come on at a earlier temp. than the stock switch. I prefer the 180 over the stock 225. I also run a 180 thermostat. That keeps the car at around 190 .Thats were I like it. MY car seems to respond better at that temp. Just something to think about.

Do you have a link to the part?

I had the same issue happen to me and then my fuse link burned up. It would work when I turned the A/C heater switch on. I have yet to find where the problem is. I just replaced mine with 2 Advance Auto electric fans and a temperature control now.

OK, Sorry I stand corrected. Kragens/Advanced Auto offers a fan switch(direct stock replacement) at fan on temps. of
204 Degrees Part # TFS8
213 Degrees Part # TFS4
224 Degrees Part # TFS1
The other lower temp. ones are kits meant to replace the stock set up.Or change the "on" temp. of the existing stock fan. I remember now that I used the 204 switch on the stock fan for back up of a axillary manually switched front pusher fan that runs all the time with the key on unless I manually turn it off. Sorry about the confusion .