Definitive Coolant Temperature Thread (1 Viewer)

[psfpilot]

After reading Buckru's post about the definition of acceptable 1FZFE coolant temperature ranges, I figured I'd try to start a thread.

We need a definitive temp thread so people can compare like rigs to like rigs under similar scenarios.

Here's my info:

Year - 1996
Motor - normally aspirated
Head Gasket - original
Radiator - 95-97 aluminum
Thermostat - original OEM
Coolant - 50/50 Toyota red, no additives
Tyres - 285/75r16
Gears - 4.11
Fan Clutch - late blue hub, 30k cst oil, LT's adjustment
Ambient Temp - 85˚F
Air Conditioner - on, low
Gauge(s) - UltraGauge & stock factory gauge
Coolant Temps - 185˚F highway, 193˚F idling, on UltraGauge

.

 

[94SRUNNER]

I will pitch in with this data set....

Here's my info:

Year - 1997
Motor - normally aspirated
Head Gasket - original
Radiator - OEM Brass - 5/2010
Coolant - 40% Toyota red/ 60% Distilled Water, no additives - 5/2010 (swapped yearly)
Tyres - 265/70R17
Gears - 4.11
Fan Clutch - late blue hub, 15k cst oil, Factory setting (bad seal...leaking) - 8/2010
Ambient Temp - 80˚F
Air Conditioner - off
Gauge(s) - ScanGaugeII & stock factory gauge
Coolant Temps - 190-193˚F highway, 193-195˚F idling, on ScanGaugeII

 

[arndog123]

You might want to add what radiator they're running as well since some have "upgraded" to the earlier style radiator. I'll try to get some #'s for both 80's this weekend.

 

[alaskacruiser]

Please note I've added the following things I think should be included:
- Aux. fan / Size
- Radiator Type (as arndog123 suggested)
- Dates on any cooling system parts replaced (included next to part description)
- Other Comments (ex: winch / lights installed can affect coolant temperature)


Year - 1997
Motor - normally aspirated
Head Gasket - original
Radiator Type: Toyota OEM '95-97 Aluminum Radiator, new in 2003
Coolant - 50/50 Zerex Original Green / Distilled Water, RMI-25 Additive
Tires - 285/75r16
Gears - 4.11
Fan Clutch - late blue hub, ??k cst oil, new in 2006, adjusted by landtank
Aux. Fan / Size - yes, 14"
Ambient Temp - 80˚F
Air Conditioner - on, low
Gauge(s) - ScanGauge II
Coolant Temps - 184˚F highway, 186˚F idling, on ScanGauge II
Other Comments: No winch in ARB winch bumper, horns relocated, bypass coolant filter installed, new radiator / heater hoses all around, new thermostat 2010

 

[VanGo]

Year - 1997
Motor - Normally Aspirated
Head Gasket - PM'd 1/2009
Radiator Type: OEM
Coolant - 50/50 Toyota Red/Distilled, No additives, Rear heater bypass 1/2009
Tires - 285/75R16
Gears - 4.11
Fan Clutch - Late blue hub, 15k cst, 7/2010
Aux. Fan / Size - No.
Ambient Temp - 87˚F
Air Conditioner - On, High/Med.
Gauge(s) - ScanGauge II/Stock set
Coolant Temps - 184˚F-186˚F highway, 190˚F idling, on ScanGauge II
Other Comments: ARB bumper, IPF 900 XSDs, IL License plate, Safari snorkel

 

[Buckru]

Thanks for taking the lead and spelling definitive correctly

Year- 1997
Mileage- 227k
HG- OEM replaced at 187k
Motor- Naturally apsirated
Rad- 3 row brass, old style
Clutch- new oem blue w/ 20k
t-stat- 1k miles on her
Water pump- original
antifreeze- Napa green 50/50/ distilled, replaced yearly
tires- Toyo 35's
Gearing- Stock
Aux fan- No
Ambient temp- 99* and bright sun
Conditions- Houston city traffic at 3pm. Start/stop up to 35mph
Ac - On max recirculate
Temp- 207* max temp and cooling down to 201
Temp guge- My rt temp guage showed 1.5 needles below red. (subjective to seating position and I sit tall in the saddle)
Temps verified with a Snapon reader
I do have lights on the bull bar

This was the hottest I could get my rig to run. After reviewing notes, I was 205 at freeway speeds in same conditions with cooling down to 199. I do have lights on the ARB bumper.

The temps I posted in the other thread are based on what I had read and most from the dead of summer. Nobody seems to discuss temps in the winter months

Buck

 

[shfd739]

Ill throw mine in the mix too. 191,xxx miles.

Year - 1997
Motor - normally aspirated
Head Gasket - original
Radiator Type: original
Coolant - 50/50 Toyota red/distilled wter
Tires - stock size BFG ATs
Gears - 4.11
Fan Clutch - 4 day old Blue Hub with 30k fluid-maybe a little overfilled, sounds like it always on, but not sure
Aux. Fan / Size - had a 12"-abandoned in place
Ambient Temp - low 90s˚F
Air Conditioner - on, med
Gauge(s) - ScanGauge II
Coolant Temps - 182˚F highway, 190˚F idling when initially stopping in traffic, after a little drops to high 180s on ScanGauge II
Other Comments: New water pump,Toyota thermostat and newly filled blue hub done 4 days ago. A/C is colder than it's ever been.Prior to this work 4 days ago was seeing up to 214 in traffic and 200ish at idle with A/C worth crap unless moving. Also 4 days ago replaced a no longer sealed and broken in 3 places fan shroud with a new one that I properly sealed with foam tape.

 

[CycloSteve]

OK temps here in NorCal not so hot lately, but here is my test and figures

Miles - 159,XXX
Year - 1996
Motor - S/C
Head Gasket - OEM New, replaced 2k miles ago
Radiator Type: OEM Brass 3-Row, replaced 2k miles ago
Coolant - 50/50 Toyota Red / Distilled Water
Tires - 315's
Gears - 4.88's with ARB AirLockers (unlocked)
Fan Clutch - OEM New blue, 10k Fluid, replaced 2k miles ago
Fan - Ringed S/C version from TRD
T-Stat - OEM, replaced 2k miles ago
Hoses - OEM, replaced 2k miles ago
Aux. Fan / Size - No
Ambient Temp - 73˚F
Air Conditioner - On, Medium
Gauge(s) - Innovate LM2, plugged into OBDII Port, RavenTai modified OEM gauge (it moves, and never goes beyond the middle!)
Coolant Temps - 181˚F downhill, 185˚F idling, 187˚F @ 65mph on flat highway in OD, 192˚F climbing 1800' pass @55mph in 3rd.
Other Comments: Armour all around, Lightforce 170's on Slee bumper.

 

[BirfMark]

Year: 1993
Mileage: 186k
Head Gasket: OEM replaced at 158k
Motor: Naturally apsirated
Radiator: 3 row brass, factory original afaik
Fan clutch: OEM black hub w/ 10k CST oil
Thermostat: unknown
Water pump: original
Antifreeze: green 50/50/ distilled
Tires: 285/75R16
Gearing: Stock
Auxiliary fan: No
Ambient temp: 60°
Conditions: Mountainous, towing a 3k popup camper from 5,000' to 8,400'
AC: off
Engine Temps: 220° max temp on hard hills in 2nd gear, 4,000 rpm and cooling down to 193° on downhill portions. In city driving, I'll see around 190° - 195° while moving, and up to 205° while stopped at a light, idling. I'd like to see closer to 185°, but haven't been able to get there yet.
Temp gauge: My temp gauge shows almost perfectly horizontal under 'normal' conditions, and a needle width above level when at 220°.

I have an aftermarket GlowShift digital gauge with a sending unit installed on the upper water neck just behind/under the distributor. (I was told this is the 'hottest' part of the coolant - where it leaves the block.) I've double checked the temperature there with a cheap Harbor Freight non-contact thermometer, and it's within a few degrees. I'd like to pick up a second sending unit for my aftermarket gauge, and install it in the return (cool) side near the thermostat, and then be able to switch between sending units to verify that the radiator is doing it's job properly. Maybe that'll be a winter project.

I to have lights on the ARB bar, partially blocking the grille.

Mark

 

[fj4068]

Year - 1996
Motor - NA
Head Gasket - new Toyota w/5,000 mi.
Radiator - 95-97 aluminum
Thermostat - original OEM
Coolant - 50/50 Toyota red
Tyres - 285/75R16
Gears - 4.11
Fan Clutch - late blue hub, 10k cst oil, LT adjustment method @~105F
Ambient Temp - 107˚F, humidity ~20%
Air Conditioner - on, high
Gauge(s) - UltraGauge & stock factory gauge
Coolant Temps per UltraGauge - 199˚F highway, flat or uphill; 184˚F idling

 

[Czar]

I'll play:

Year - 1997
Motor - normally aspirated
Head Gasket - original
Radiator - 1997 alum
Thermostat - original OEM
Coolant - 50/50 Green prestone
Tyres - 275/70r16
Gears - 4.11
Fan Clutch - late blue hub, stock
Ambient Temp - 80-103 observed summer temps
Air Conditioner - on, off dont matter
Gauge(s) - UltraGauge & stock factory gauge
Coolant Temps - 194˚F highway almost always(70mph), 192 idle, 197-204 uphill in 90 degree weather.

*Basically its consistantly at 194 around town, it only reaches 200-204 during extended steep uphill climbs.

 

[Ozdunc]

Year - 1994 Australian spec GXL
Motor - normally aspirated
Head Gasket - original
Radiator - changed out 2010
Thermostat - on 2nd OEM
Coolant - 50/50 Toyota OEM coolant
Tyres - 285/75r16 old skool MTR
Gears - 4.11
Fan Clutch - stock
Elevation - 0m to 1500m
Ambient Temp - 80-112+ observed summer temps
Air Conditioner - on, off dont matter
Gauge(s) - TM2 coolant monitor - temp taken off bolt connecting coolant outflow pipe from engine
Coolant Temps - 163˚F highway almost always(70mph), , 181˚F long uphill in 112+ degree weather.

No EGR or cat or anything like that.

 

[cool breeze]

How are you 1993-94 guys getting your temp? Accurately?

 

[fj4068]

Year - 1996
Motor - NA
Head Gasket - new Toyota w/5,000 mi.
Radiator - 95-97 aluminum
Thermostat - original OEM
Coolant - 50/50 Toyota red
Tyres - 285/75R16
Gears - 4.11
Fan Clutch - late blue hub, 10k cst oil, LT adjustment method @~105F
Ambient Temp - 107˚F, humidity ~20%
Air Conditioner - on, high
Gauge(s) - Ultra Gauge & stock factory gauge
Coolant Temps per Ultra Gauge - 199˚F highway, flat or uphill; 184˚F idling

Same conditions as above, but idling on hot concrete at the drive-through window (undoubtedly a higher localized air temp coupled with maximum sun exposure), it peaked at 210.2˚F on the Ultra Gauge.

 

[pnolanIH8MUD]

Year - 1997
Motor - NA
Head Gasket - original
Radiator - changed between 2005-7?
Thermostat - original OEM
Coolant - 50/50 green
Tyres - 285/75R16 Michellin
Gears - original
Fan Clutch - late blue hub, 20k cst oil, no tuning
Ambient Temp - 107˚F, humidity ~50%
Air Conditioner - on, high
Gauge(s) - Ultra Gauge & stock factory gauge
Coolant Temps per Ultra Gauge II - 193˚F highway @ 70mph, flat; 213˚F idling in driveway after 10 min hwy run.

Note: Pulled out new Hayden and replaced with the 20k blue hub rebuild because hwy temperatures climbed at 65pmh. New fluid and old blue hub seem to perform better at hwy speed. If temps climb at idle, the blue hub can bring them down if I idle at 1500rpm. Not sure if the PVC hose I used was too small a diameter. I'm still testing this rebuilt blue hub and will repost after day trip tomorrow.

 

[MoGas]

Here's my info:

Year - 1993
Motor - Normally aspirated
Head Gasket - Original
Radiator - Koyo (93 version)
Thermostat - OEM
Coolant - 50/50 Toyota red, no additives
Tyres - 285/75r16
Gears - 4.11
Fan Clutch - Black hub, 10,000 cst, factory temp settings
Ambient Temp - any
Air Conditioner - on, low
Gauge(s) - Autometer reading from upper coolant pipe, stock factory gauge
Coolant Temps - 180˚F all the time.

 

[Hoosier Daddy]

Year - 1995
Motor - normally aspirated
Head Gasket - original
Radiator - original (AFAIK)
Thermostat - OEM, replaced 2011
Coolant - 50/50 Prestone green
Tyres - 285/75r16
Gears - stock
Fan Clutch - original
Ambient Temp - 85˚F
Air Conditioner - off
Gauge(s) - eBay OBD-II reader plus Android Torque app
Coolant Temps - 187˚F highway, 188˚F idling, 193˚F climbing a long hill, (177˚F highway at ambient temp of 35˚F and both heaters blowing)

 

[HeadacheManNYC]

Year - 1996
Mileage - 153K
Engine - NA
HG - original
Radiator - stock
Tstat - original
Coolant - 50/50 green
Tires - 285/75/16
Gears - stock
Fan clutch - original
Ambient temp - 75 F
A/C - off

As per scan gauge II:

City driving - 190 when moving, 193 at idle
Highway - 188 downhill, 191 flat, up to 198 uphill
Highest temp I've seen was 202 on a .9 mile steep grade at 45mph in 3rd gear

 

[scottryana]

Year - 1996
Motor - normally aspirated
Head Gasket - original
Radiator - original
Thermostat - OEM replaced in the last 2 months
Coolant - 50/50 Toyota red, no additives
Tyres - 315/75r16
Gears - 4.11
Fan Clutch - Original
Ambient Temp - 100+˚F
Air Conditioner - on, High
Gauge(s) - ScanGauge II & stock factory gauge
Coolant Temps - 1831˚F idling, 222˚F with cruise set at 75mph on GPS, on ScanGauge II

 

[rockrod]

does it have to be a 1FZ?