Coolant temperature?

IHateHacks · 06-14-2006, 02:32 PM

Could someone with an aftermarket water temp gauge and a good motor tell me what a 7MGTE runs at?

With a NAPA 180 F degree thermostat im seeing 185-200 F degrees with 200 under full boost climbing a mountain on the highway, and 185-190 around town, stop and go.

I bought a Toyota 88 C degree thermostat (190.4 F degrees) that weighs 3 times as much as the crappy one im using at the moment, but seeing its a higher temp im hesistant to use it.

So could anyone with an accurate aftermarket water temp gauge and a known degree thermostat please tell me what you run?

ddmcse · 06-15-2006, 01:11 AM

i have a toyota 160 thermostat and the numbers are about the same except i don't get to 200
and on a night like tonight here in ct , it will hang around 170 off the highway on back roads.
i think it's an autometer gauge

IHateHacks · 06-15-2006, 12:40 PM

Hey thanks for the response. So you see 10 degrees above your thermostat rating just like I do around town. And its not quite 200, the gauge reads 190 then 230 with a line 50% inbetween them being 210. The needle barely makes it 25% of the way from 190 to 230, with 25% being 200 degrees. So its probably 197 or 198 but pretty goddamn close to 200. Thats under 7.7psi climbing a huge ass hill about 1 mile long.

1 more thing too, I have power to my gauge with the key just to ACC so I can monitor temp with the ignition totally off. Now, as soon as I turn the car off when warmed up, the needle always moves down about 5 degrees from where it was with the ignition on and the engine running, meaning because of all the electrical loads the resistance is a little higher when running, resulting in an inaccurate reading by 5 degrees.

I dont know maybe Im thinking to hard, I just want to know if its normal.

06-14-2006, 02:32 PM	#1
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	Coolant temperature? Could someone with an aftermarket water temp gauge and a good motor tell me what a 7MGTE runs at? With a NAPA 180 F degree thermostat im seeing 185-200 F degrees with 200 under full boost climbing a mountain on the highway, and 185-190 around town, stop and go. I bought a Toyota 88 C degree thermostat (190.4 F degrees) that weighs 3 times as much as the crappy one im using at the moment, but seeing its a higher temp im hesistant to use it. So could anyone with an accurate aftermarket water temp gauge and a known degree thermostat please tell me what you run?

06-15-2006, 01:11 AM	#2
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	i have a toyota 160 thermostat and the numbers are about the same except i don't get to 200 and on a night like tonight here in ct , it will hang around 170 off the highway on back roads. i think it's an autometer gauge __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

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06-15-2006, 12:40 PM	#3
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	Hey thanks for the response. So you see 10 degrees above your thermostat rating just like I do around town. And its not quite 200, the gauge reads 190 then 230 with a line 50% inbetween them being 210. The needle barely makes it 25% of the way from 190 to 230, with 25% being 200 degrees. So its probably 197 or 198 but pretty goddamn close to 200. Thats under 7.7psi climbing a huge ass hill about 1 mile long. 1 more thing too, I have power to my gauge with the key just to ACC so I can monitor temp with the ignition totally off. Now, as soon as I turn the car off when warmed up, the needle always moves down about 5 degrees from where it was with the ignition on and the engine running, meaning because of all the electrical loads the resistance is a little higher when running, resulting in an inaccurate reading by 5 degrees. I dont know maybe Im thinking to hard, I just want to know if its normal.