Bad fan switch or relay?
08-18-2011, 10:39 AM
#16
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Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: Bad fan switch or relay?
The knock sensor is definitely worse than the temp switch, in my own experience.
Though the temp switch is not easy to get to (unless you have headers).
Btw, do not use any tape on the threads of the temp switch. It needs to have good contact with the head because that's how it grounds the relay.
If you have a bucket handy, you can always drain about a gallon of coolant to drop the coolant level below the heads. That way, you won't loose any coolant or get wet when swapping the switch.
Lou
P.S.: I envy your location right now. I bet you don't have 105.
Though the temp switch is not easy to get to (unless you have headers).
Btw, do not use any tape on the threads of the temp switch. It needs to have good contact with the head because that's how it grounds the relay.
If you have a bucket handy, you can always drain about a gallon of coolant to drop the coolant level below the heads. That way, you won't loose any coolant or get wet when swapping the switch.
Lou
P.S.: I envy your location right now. I bet you don't have 105.
08-18-2011, 01:04 PM
#17
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Thread Starter
Join Date: Jul 2011
Location: Holland, MI
Posts: 47
Re: Bad fan switch or relay?
The knock sensor is definitely worse than the temp switch, in my own experience.
Though the temp switch is not easy to get to (unless you have headers).
Btw, do not use any tape on the threads of the temp switch. It needs to have good contact with the head because that's how it grounds the relay.
If you have a bucket handy, you can always drain about a gallon of coolant to drop the coolant level below the heads. That way, you won't loose any coolant or get wet when swapping the switch.
Lou
P.S.: I envy your location right now. I bet you don't have 105.
Though the temp switch is not easy to get to (unless you have headers).
Btw, do not use any tape on the threads of the temp switch. It needs to have good contact with the head because that's how it grounds the relay.
If you have a bucket handy, you can always drain about a gallon of coolant to drop the coolant level below the heads. That way, you won't loose any coolant or get wet when swapping the switch.
Lou
P.S.: I envy your location right now. I bet you don't have 105.
Yeah, it's gonna be 82 and sunny for a high today. In 3 months I will be envying your location. I have to put my Camaros up for the winter.
08-18-2011, 01:10 PM
#18
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Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: Bad fan switch or relay?
We haven't had rain since January, trees are dying, bushes too, grass has been gone since May. 111°F isn't rare these days. The hottest and driest summer so far (I have never used 1.5 megawatts of electricity in one moth before).
I'd kill for 82.
Sure, come over in 3 months, we should be down to 80's by then.Lou
08-18-2011, 01:23 PM
#19
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Join Date: Jul 2011
Location: Holland, MI
Posts: 47
Re: Bad fan switch or relay?
It is not recommended to use any pipe sealant to ensure good contact. The threads on the switch are brass to provide a good seal on its own (brass is soft metal). Just tighten it well and it won't leak.
We haven't had rain since January, trees are dying, bushes too, grass has been gone since May. 111°F isn't rare these days. The hottest and driest summer so far (I have never used 1.5 megawatts of electricity in one moth before).
I'd kill for 82. Sure, come over in 3 months, we should be down to 80's by then.
Lou
We haven't had rain since January, trees are dying, bushes too, grass has been gone since May. 111°F isn't rare these days. The hottest and driest summer so far (I have never used 1.5 megawatts of electricity in one moth before).
I'd kill for 82.
Sure, come over in 3 months, we should be down to 80's by then.Lou
As far as the weather goes, I think we are in a la nina pattern. Here we have been getting lots of rain this summer, and there are mushrooms and toad stools growing everywhere. The southwest gets dry. When trees die, that's severe! Al Gore is still wrong wrong wrong!
08-18-2011, 02:28 PM
#20
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Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: Bad fan switch or relay?
Ok, I'm on the same page now. When I replaced the temp sensor, it was brass, and I didn't use anything on the threads.
As far as the weather goes, I think we are in a la nina pattern. Here we have been getting lots of rain this summer, and there are mushrooms and toad stools growing everywhere. The southwest gets dry. When trees die, that's severe! Al Gore is still wrong wrong wrong!
As far as the weather goes, I think we are in a la nina pattern. Here we have been getting lots of rain this summer, and there are mushrooms and toad stools growing everywhere. The southwest gets dry. When trees die, that's severe! Al Gore is still wrong wrong wrong!
We have only 3 trees left from the 8 we had before. We are used to the heat but the drought is the killer. I wonder when the rednecks down here will try to pin it on Obama.
08-18-2011, 04:21 PM
#21
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Join Date: Jul 2011
Location: Holland, MI
Posts: 47
Re: Bad fan switch or relay?
Any sensor that has 2 or 3 wires on our GM engines can use thread sealant because the ECM provides separate ground (black wire). But for single-wire sensors/switches, the ground is provided from the block so that's why one should not use any thread sealant.
We have only 3 trees left from the 8 we had before. We are used to the heat but the drought is the killer. I wonder when the rednecks down here will try to pin it on Obama.
We have only 3 trees left from the 8 we had before. We are used to the heat but the drought is the killer. I wonder when the rednecks down here will try to pin it on Obama.
That's a lot of trees. They take a life time to grow. What kind of trees are they?
08-18-2011, 06:51 PM
#23
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Location: Holland, MI
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Re: Bad fan switch or relay?
Just an update here... I removed the connector and it fell apart. I was able to tape it to the wire, but I don't trust the connection to last. I will need to find a connector somewhere. The fan does come on now when it reaches about 225*, so it works for now.
09-09-2011, 01:44 PM
#25
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Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: Bad fan switch or relay?
Thank you for chiming in.
Stevolwevol, to answer your question (sorry it's so late), somebody decided to plant Canadian Maples in the desert of Texas. Many smart people here as you can see.
We are out of the 115's and next week looks like 100 degrees. The fall is finally here. :-D
Driving around in my Z28 convertible is much more enjoyable now.
09-09-2011, 01:54 PM
#26
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Join Date: Jul 2011
Location: Holland, MI
Posts: 47
Re: Bad fan switch or relay?
Yes, that test was performed and the switch replaced. The car has been back on the road for almost a month now.
Thank you for chiming in.
Stevolwevol, to answer your question (sorry it's so late), somebody decided to plant Canadian Maples in the desert of Texas. Many smart people here as you can see.
We are out of the 115's and next week looks like 100 degrees. The fall is finally here. :-D
Driving around in my Z28 convertible is much more enjoyable now.
Thank you for chiming in.
Stevolwevol, to answer your question (sorry it's so late), somebody decided to plant Canadian Maples in the desert of Texas. Many smart people here as you can see.
We are out of the 115's and next week looks like 100 degrees. The fall is finally here. :-D
Driving around in my Z28 convertible is much more enjoyable now.
You said down to 100?? yikes! We had a good summer, but too darn wet. Not trying to rub it in. Lots of mosquitos, spiders, mowing twice a week...
09-09-2011, 05:55 PM
#27
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Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: Bad fan switch or relay?
Flawed engineering? Do you even realize what car you own? 
Our engines can handle 230 degrees, no problem. The "standard" operating temperature is 220, per spec. That's why the Fan On temperature is set at 235+.
I know you guys got some wet weather. Then there are the floods on the East Coast. Europe has had an unusually wet and cold summer (50's and rain). But Texas is suffering the worst drought in centuries. With all the fires on top of that.
So talk about crazy weather! We are getting ready to move.
Our engines can handle 230 degrees, no problem. The "standard" operating temperature is 220, per spec. That's why the Fan On temperature is set at 235+.
I know you guys got some wet weather. Then there are the floods on the East Coast. Europe has had an unusually wet and cold summer (50's and rain). But Texas is suffering the worst drought in centuries. With all the fires on top of that.
So talk about crazy weather! We are getting ready to move.
09-09-2011, 06:23 PM
#28
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Join Date: Jul 2011
Location: Holland, MI
Posts: 47
Re: Bad fan switch or relay?
Yeah I'd say it's flawed if that's a good word. The high temps are so the cars pass emissions testing. Not for engine longevity.
We are not in a flood prone area thankfully. Move where?
We are not in a flood prone area thankfully. Move where?
09-09-2011, 06:34 PM
#29
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Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: Bad fan switch or relay?
You are right, they chose to run the engines at higher temperatures for better emissions.
We are looking into the Carolinas. Decent weather, good people, hopefully decent jobs.
And I can drive my convertible there with not much rain or snow.
We are looking into the Carolinas. Decent weather, good people, hopefully decent jobs.
And I can drive my convertible there with not much rain or snow.
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