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Old 08-08-2010, 08:42 PM
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ok so.if anyone else should ever consider these gauges for their IDI,or any sending units supplied with your gauges for that matter that are 1/8 pipe threads:

trans temp:
1. like noted in the pic @ that port.you;ll need nothing.the supplied sending unit screws right in. OR:
2.remove the line going into the radiator (it's the front line on the E40D.)make sure to use a catch pan.
once the hose is off,unscrew that hose barb fitting.
you'll need:
("watts" brand part #'s sold @ home depot)
a.#A-730 - holds your sending unit,and allows flow into radiator.
1/4" pipe T
b.A-741 - screws into radiator.
1/4 x 1 1/2" (you need this long one to clear the radiator,plus it helps to be able to lock vice grips onto it without hitting the threads.)
c.A-293 - screws into opposite side of T for your hose to connect back to.
3/8 Barb X 1/4 MIP
d.A-738 - screws into the top of the T for your sending unit to screw into.
1/4 MIP x 1/8 FIP

oil pressure:
1.A-738
1/4 MIP x 1/8 FIP
this adapts the stock hole for your supplied sending unit to screw into.

water temp
1.A-778
3/8 MIP X 1/4 FIP
2.A-738
1/4 MIP x 1/8 FIP
with a cool engine,drain approximately 1 gallon of coolant into a catch pan using the radiators petcock drian located on drivers side at the bottom.
use both of these combined to screw into the stock water temp sending unit hole (located on the left in the pic of Daves red engine above.you can remove it by pulling the wire off,and using a half inch drive ratchet,swivel and extension.this is a PITA to install.very tight spot.i suppose a few things should have come undone,though id take my time and just sneak a wrench in there again lol.you'll need a 9/16 and and an 11/16 both.spin the top and the bottom to achieve your spins with the wrenches.if you try it,you'll see lol.ideally a socket with a slot so the wire could stick out of it would have been cool.)
if you want to use the port on the right,you would also need to grab the next size up pipe bushing.

for details on wiring your gauges and everything else like that,seek the instructions that are supplied with the gauges.
there you have it.

although the instructions tell you not to use thread tape due to possible no ground.i thought about it lol,then wised up and used it before installing the water and trans temps.
i didn't bother putting any on the oil pressure sending unit though.
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♠ Log Truck: '93 F-Super Duty (F450) XLT 1st Gen Navistar 444ci IDI Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, E40D, 5:13, Dually, 16' Dump & Auto Crane ♠
♠ Chip Truck: '93 F250HD XLT 4x4 1st Gen Navistar 444ci IDI Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, E40D, 3.55, Dually, 9' Dump, & Plow ♠

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