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I bought a 5 inch tach with a water temp., oil temp, and oil pressure gauge in it as well. i have the tach all rigged up but im not sure how to do the other 3. I have the sending units for each of them but i dont know how to rig them up. Any help would be appreciated.
 

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Are the gauges electric or mechanical? If they are mechanical you need to find or make an opening in the firewall and run them to the engine.
 

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I believe theyre electric. Theyre a wiring harness running out of the tach with wires for each of the sending units, then the sending units themselves, however they do have threads on them so im wondering if theres a spot on the engine block that im supposed to just screw them into?
 

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The only thing that I can tell you is that you will need the sending units for the three gauges. The oil sending unit will go up by the oil filter and the water temp will go into the intake manifold. If your car is fuel injected then you may have more than one temp sender. On a carb car the sender is in the drivers side front of the intake manifold. The oil temp I am not sure of. You will have to find a spot for it. Either using a tee at the oil pressure sensor or finding another fitting going into an oil passage or the oil pan. More than likely you will have to get some pipe fitting ada[ptors to match the thread on the senders to the engine. If there is a ground wire for the gauges and/or tach I would run that to the engine also.
 
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