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Installing a Water Temp sensor, need a little info (I'VE SEARCHED!)

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Old May 19, 2004 | 06:02 PM
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Installing a Water Temp sensor, need a little info (I'VE SEARCHED!)

Ok, after a while of debating and reading.. i've decided on how about im going to install my water temp gauge.

I've decided to put a Y-pipe in the place of the stock sendor, and run both sendors off the ends of the Y-pipe.

For this I will need a little bot of info though, I need to know:

The thread pitch of the stock sendor, and the outside diameter (which would be the same as the inside diameter of the hole in the block)

Anyways, this is the way im planning on doing it, does anyone have any suggestions / comments about this way? or is there a better way of doing it?

Thanks
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Old May 19, 2004 | 07:45 PM
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Originally posted by OWNED
I've decided to put a Y-pipe in the place of the stock sendor, and run both sendors off the ends of the Y-pipe.
That works okay for pressure senders, but I wouldn't do it for a temp sender as there'll be no direct flow over either sensor any more. They're no longer in the flowing water stream, so they'll react slower to changes in temperature.

If you can't get a temp gauge with a sender that'll screw straight into the stock location (they seem to be rare), then the best location is on the back of the water pump next to the ECU thermosensor. Unfortunately this requires removal of the water pump so you can drill and tap a new hole. PITA I know...

Last edited by NZConvertible; May 19, 2004 at 07:47 PM.
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Old May 19, 2004 | 08:41 PM
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There is another option. There is an "in line" water temp sensor. You cut your stock radiator hose in half, fit this thing in, two hose clamps and your done. Not the prettiest, however it saves you from having to pull off the water pump.
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Old May 20, 2004 | 09:17 PM
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Originally posted by NZConvertible
That works okay for pressure senders, but I wouldn't do it for a temp sender as there'll be no direct flow over either sensor any more. They're no longer in the flowing water stream, so they'll react slower to changes in temperature.

If you can't get a temp gauge with a sender that'll screw straight into the stock location (they seem to be rare), then the best location is on the back of the water pump next to the ECU thermosensor. Unfortunately this requires removal of the water pump so you can drill and tap a new hole. PITA I know...
Well I have the Autometer UltraLight Electric temp gauge, I was told this fits into the stock location... but the thread pitch is different... is this true? Can U just string on some teflon tape and crank it in?
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Old May 20, 2004 | 10:55 PM
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Originally posted by OWNED
Well I have the Autometer UltraLight Electric temp gauge, I was told this fits into the stock location... but the thread pitch is different... is this true? Can U just string on some teflon tape and crank it in?
thats not a good idea. you can just re-tap the hole to the right thread pitch.
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Old May 20, 2004 | 11:37 PM
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Yea... but where the stock sendor is located makes it hard to get a tap wrench in there...

hmm... I think I might have to tap the water pump or something..?
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Old May 21, 2004 | 01:40 AM
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The stock sender IS in the back of the waterpump. you have to remove the water pump in order to get it out and then re-tap the hole and insert the new one.
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Old May 21, 2004 | 01:53 AM
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i have mine sensor in here :

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Old May 22, 2004 | 12:54 AM
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Originally posted by f1blueRx7
The stock sender IS in the back of the waterpump. you have to remove the water pump in order to get it out and then re-tap the hole and insert the new one.
No, no, no! The sensor on the back of the water pump is for the ECU, not the gauge. If should not be removed.

The gauge sender is located here:

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Old May 22, 2004 | 07:46 AM
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The ones in the water pump housing look the most professional and functional.

The Y-Pipe idea gets you credit for thinking original ....but definety won't work.

That said....I did the 'ole *cut the upper radiator hose in half ...install a short piece of pipe with the sender installed in it jobber*. Works just fine, not as proffessional, has a small drawback in that it's not functional til the thermostat opens (you still have your original gauge for that short period). Oh, and you have to make a ground for that short piece of pipe.
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