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Old 11-09-2005, 06:15 PM   #1
saturn2wagon
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Default temp gauge not working in sw1

Hello everyone Iam new here but not new to Saturns, In the past I have owned a 94 SL1, 98 SL1, and a 99 SC2 3DC. I currently own a 98 SW2 (which is my current project) a 95 SC1 and i just bought my wife a 95 SL1.

Now for my problem The guy i just bought my 95 SL1 from blew up the original engine and had the engine and trans. from a 01 SL1 installed. Well ive noticed that the temp gauge doesn't work in it, after a little investication i found out that the coolant temp sending unit (not the ECTS) is unplugged. simple fix right? WRONG the 01 motor doesnt have a temp sending unit (at least its not in the same place as the 95's is). I called the local Saturn dealership and they told me i would have to change the head to the older style, but im not going to do that to a motor that only has 25,000 miles on it just for a gauge. Im puting all aftermarket gauges in my SW2 and i know that that is an option in this car too, but is it my ONLY option?? i hope not i really dont want to do that. Any help would be greatlly appreciated. And if this is already in another thread i'm sorry I did a search to no avail.

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Old 11-09-2005, 06:50 PM   #2
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Default Re: temp gauge not working in sw1

Drill a hole and tap it where the gauge sender would have gone on your 95. There'll be pics in someone's gallery of an earlier SOHC. If all else fails JB weld the sender to something warm.

The 00- and-older motors are better, stronger blocks, less oil burning, so don't get rid of any of that over any silly gauge.

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Old 11-09-2005, 07:45 PM   #3
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Default Re: temp gauge not working in sw1

It may be possible to tap into the ECTS wiring to send a signal to the gauge? Not sure on that, just an idea.

Check this thread:
http://www.saturnfans.com/forums/showthread.php?t=64415

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Last edited by dansl2; 11-09-2005 at 07:56 PM..

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Old 11-10-2005, 08:55 AM   #4
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Default Re: temp gauge not working in sw1

Seen a few "fixes" suggested for this all involve putting a tee somewhere and putting the sensor there. I believe it's 1/4" pipe threads. Locations suggested:

heater hose
the elbow where the coolant goes into the manifold
where the sensor is now

I haven't done any of the above, but I have seen some posts about it.

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Old 11-10-2005, 02:55 PM   #5
saturn2wagon
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Default Re: temp gauge not working in sw1

i guess im just gonna put a tee in the head where the ects is and stick them both there thank you everyone for your help!!

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Old 11-10-2005, 03:04 PM   #6
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Default Re: temp gauge not working in sw1

I would worry about anything that gets the ECTS out of the direct flow of water.

If the Tee sticks out, cool antifreeze might linger around the ECTS as the car warms up.

This will have a subtle effect on your economy.

If there is a compromise made, it should only effect the gauge.

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Old 11-10-2005, 08:56 PM   #7
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Default Re: temp gauge not working in sw1

Quote:
Originally Posted by eljefino
I would worry about anything that gets the ECTS out of the direct flow of water.
.
Thats why I was wondering about splicing into the wiring instead of putting a T there.....is that even feasible, or would it draw off too much signal to the cpu?

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Old 11-11-2005, 12:32 AM   #8
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Default Re: temp gauge not working in sw1

Quote:
Originally Posted by dansl2
Thats why I was wondering about splicing into the wiring instead of putting a T there.....is that even feasible, or would it draw off too much signal to the cpu?
No. Don't so that.


Proper method would be to drillout the flat just underthe rad hose fitting and tap the right threads into the hole for the gauge temp sender.
Tapping into the metal colant line to the surge tank will get you by.

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