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Author Topic: Stock temp gauge plus aftermarket  (Read 878 times)

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Offline 3zuks

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Stock temp gauge plus aftermarket
« on: June 22, 2013, 08:18:52 AM »
Does anyone run their stock water temp gauge in addition to an aftermarket gauge?  The previous owner disconnected the stock gauge when he added an aftermarket gauge.  Can I do something electrically like add an in line resistor to add the stock line to the aftermarket sender or is there a fitting that will let me Y in the stock sender?

Thanks.

Offline Boxcar

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Re: Stock temp gauge plus aftermarket
« Reply #1 on: June 22, 2013, 09:22:32 AM »
I ( when ruining a Suzuki motor ) ran the stock gauge from the original sender and a mech gauge from a line adapter in the upper radiator hose.
 I now run a Datsun motor with a 2 port thermo housing and am still running both gauges.
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Online fordem

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Re: Stock temp gauge plus aftermarket
« Reply #2 on: June 22, 2013, 09:24:38 AM »
Trying to drive two gauges from one sensor will not work.

You need to determine what was done to fit the aftermarket gauge - it is unlikely that the aftermarket gauge was electrically compatible with the original sensor so the probability is that a new sensor has been fitted, it's also not likely that the aftermarket sensor was physically compatible with the original sensor, so you need to determine how the new sensor was fitted, the intake manifold (assuming a Sami, Sidekick or Tracker) may have been modified (drilled & tapped) to take the new sensor, or, the new sensor may have been fitted in the radiator top hose, in which case the original sensor may still be fitted in it's original position.

If I'm not mistaken there are threaded bosses in the manifold to take two, possibly three sensors - one for the gauge, a second for the ECU, and a third that is used to disable the a/c in case of an overheat condition - it might be possible to fit an OE sensor in the last position if it's not already being used.

Out of curiosity - why do you want to have two temperature gauges - the OE gauge provides a vague cold/normal/hot reading, the aftermarket gauges usually provide a more accurate "numerical" idea of what's going on, and that's probably why it was fitted.
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Offline 3zuks

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Re: Stock temp gauge plus aftermarket
« Reply #3 on: June 22, 2013, 12:05:47 PM »
The samurai is running on side draft webbers and using a HAWK intake manifold. There are 2 vacuumn ports and 2 wet ports.  The wet ports are being used by the heater core and the Sunpro water temp sensor.  The 2 vac ports are used by the brake booster and the PCV.  Even though the stock gauge does not tell temp, it does give me an idea if things are OK while sitting in my line of site.  The aftermarket gauges sit in 3 holes between the middle vent and the right vent.  Not in my normal field of view.  Plus having a "dead" gauge sorta bugs me. 
« Last Edit: June 22, 2013, 12:07:56 PM by 3zuks »

Online fordem

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Re: Stock temp gauge plus aftermarket
« Reply #4 on: June 22, 2013, 01:06:20 PM »
A couple of different options are available - if you can find a suitable spot on the manifold, you can drill and tap another "wet port" to take an OEM sensor (it MUST be electrically compatible with the gauge), you may able to add a tee to the heater wet port and fit an OEM sensor there, or you can add a hose adapter (as Boxcar has done) and fit an OEM sensor there.

Please be aware that an electrical sensor fitted to a hose will require a ground connection, and any sensor fitted downstream from the thermostat (as is the case with Boxcar's hose adapter) will indicate cold until the engine warms enough for the thermostat to open, and in the event of the thermostat failing shut, the vehicle will overheat without it ever registering on the gauge.
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Offline Skyhiranger

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Re: Stock temp gauge plus aftermarket
« Reply #5 on: June 23, 2013, 05:53:39 AM »
The samurai is running on side draft webbers and using a HAWK intake manifold. There are 2 vacuumn ports and 2 wet ports.  The wet ports are being used by the heater core and the Sunpro water temp sensor.  The 2 vac ports are used by the brake booster and the PCV.  Even though the stock gauge does not tell temp, it does give me an idea if things are OK while sitting in my line of site.  The aftermarket gauges sit in 3 holes between the middle vent and the right vent.  Not in my normal field of view.  Plus having a "dead" gauge sorta bugs me.

I don't know how a Hawk intake differs from stock.  But like fordem said, on a stock manifold there is an "extra" port for an AC temp sensor.  So if your samurai didn't have AC, then this port is plugged with a plug.  You can just unscrew it and put a temp sensor in its place.
If that is not an option, then your best choice is to drill and tap another wet hole in the intake manifold, for another sensor.
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Offline Boxcar

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Re: Stock temp gauge plus aftermarket
« Reply #6 on: June 23, 2013, 07:41:05 AM »
Ruining the twin temp gauges is pure gadgetry.
 
The only advantage in the way I ran it on the Zuke motor was the ability to monitor the thermostat operation.

 I also hate dead gauges. And probably had nothing better to do that day....
God Bless
88.5 Samurai Heavily modified.