parts list for gauge installation

fordman49450 · 09-24-2007, 11:46 AM

Hello, I am going to be going over a friends house, he wants to install an oil pressure gauge and coolant temp gauge which both are mechanical. The only thing is I am going over there on Sunday and i want him to have everything he needs. He also wants to use the stock gauges as well, so both will have to T or Y so both the mechanical and the stock gauges can work. Can someone give me a list of materials including how many of what size pipe and fittings to do this for the coolant and oil pressure. This is a 93 ranger with a 4.0. Thanks

**MAKG** · 09-24-2007, 12:16 PM

Umm, using a "tee" on coolant temperature will make both gauges FOS. Pressure is pressure, but temperature varies according to position. If either probe isn't immersed in flowing coolant behind the thermostat, the reading will be inaccurate.

Some engines have enough spare real estate on the lower intake that you can tap a new hole behind the thermostat. 2.9Ls, for instance. If the 4.0L does, you need a drill and tap (most aftermarket gauges use 1/4 NPT; the stock hole is 3/8 NPT -- do NOT tap it too deep as NPT threads are tapered). If there isn't a place to do that, disable the stock gauge or don't bother with the mechanical one.

For pressure, you can tee it with the caveat that there are now more fittings to leak.

samsonitesamsonite · 09-25-2007, 04:40 PM

use brass t-fittings for the oil.

09-24-2007, 11:46 AM	#1
fordman49450 Member Join Date: Aug 2007 Location: Michigan Posts: 266 Vehicle Year: 1994 Vehicle Make: Ford Vehicle Model: Ranger Rep Power: 21	parts list for gauge installation Hello, I am going to be going over a friends house, he wants to install an oil pressure gauge and coolant temp gauge which both are mechanical. The only thing is I am going over there on Sunday and i want him to have everything he needs. He also wants to use the stock gauges as well, so both will have to T or Y so both the mechanical and the stock gauges can work. Can someone give me a list of materials including how many of what size pipe and fittings to do this for the coolant and oil pressure. This is a 93 ranger with a 4.0. Thanks __________________ 1994 Ford Ranger Project in memory of my father. www.dskellogg.com/ranger.html I love you Dad

09-24-2007, 12:16 PM	#2
MAKG RBV Technical Advisor Join Date: Aug 2007 Location: California central coast Posts: 4,640 Vehicle Year: 1991 Vehicle Make: Ford Vehicle Model: Explorer Rep Power: 30	Umm, using a "tee" on coolant temperature will make both gauges FOS. Pressure is pressure, but temperature varies according to position. If either probe isn't immersed in flowing coolant behind the thermostat, the reading will be inaccurate. Some engines have enough spare real estate on the lower intake that you can tap a new hole behind the thermostat. 2.9Ls, for instance. If the 4.0L does, you need a drill and tap (most aftermarket gauges use 1/4 NPT; the stock hole is 3/8 NPT -- do NOT tap it too deep as NPT threads are tapered). If there isn't a place to do that, disable the stock gauge or don't bother with the mechanical one. For pressure, you can tee it with the caveat that there are now more fittings to leak. __________________ 1990 VW Jetta GL, 1.8L 8V gasoline engine, manual transmission, painted in oxidized red paint and ponderosa pine sap, unknown mileage. 1991 Exploder, 4.0L, M5OD-R1 manual transmission, electronic BW1354 transfer case, 3.54 gears, 31 inch tires, icky two-tone blue paint with little clear coat, 230K miles. 1972 Chevy C-10, 250 I-6, SM465 (2WD) four-on-the-floor, 3.73 gears in a GM 12-bolt, puke green with a white cab. The "4 wheeled trash can," with x70K miles. x is probably 2.

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09-25-2007, 04:40 PM	#3
samsonitesamsonite Member Join Date: Jan 2003 Location: Bellingham, Wa Posts: 1,000 Vehicle Year: 1993 Vehicle Make: Jeep Vehicle Model: Wrangler I use this vehicle for: Daily driver/weekend warrior Rep Power: 32	use brass t-fittings for the oil.