Thermo fans and engine temps

[oldcorollas]

.i have the thermo mounted on a aluminium shroud i had made up. the shrould covers the radiator completely, though we have drilled some 5 cm circumference holes on the outer edges for air flow when the car is moving.

cover the hols with a flap of rubber that can be pushed back by air when moving, but sucks closed when car is not going so quick...

look at (at least) audi90/100's for inspiration.

and as for thermostat.....

will having one that opens at a lower temp really help when the engine is already hot?

thermostat is to prevent undercooling, not assist with overheating

[sideshow]

maybe its cause its the 1uz sender unit with the hilux gauge

but i have come across this on afew toyotas

i run a trd 72 degree thermostat but then i also drilled small holes round the outside

to get bit more water flow too

earlier oopenin thermostats prob dont do much just that some of them have a bigger hole in the middle for more flow

i have been told
if u look at std toyota one for a 1uz it has a small hole
a trident one to suit a 1uz has a bigger flow so u get more water flow

[SL666]

i just put the standard hilux temp sender into my 1j, pretty sure it was the same as the one that came out of the 1j though, works like a charm.

Having thought about this issue some more, i suspect that your fans may indeed be pushing the wrong way, causing no airflow as 'say' 20km/h on the return road?

have you jumped out and felt the radiator core when this has been happening? the thermostat should be well and truely wide open by 100deg, does it push coolant into the overflow?

[1JZ.747]

sideshow


how much for the trd thermostat and where did you get it.

hydrolic going back on is not an option, 6 bosch coils now live where the bottle res did.

[sideshow]

it was around 120 to 150 not sure
thru penrith toyota i think

[manny]

Shane
When I spoke to him today, Neil had 5 TRD Thermostats left - $90 Express posted is what he charges us Soarer guys, so mention me and he will honour the same deal.

His contact details are:

RUSH Imports
Neil Griffiths
5 Silva Avenue
Queanbeyan NSW 2620
Ph: 02 6284 3111

[1JZ.747]

Shane
When I spoke to him today, Neil had 5 TRD Thermostats left - $90 Express posted is what he charges us Soarer guys, so mention me and he will honour the same deal.

His contact details are:

RUSH Imports
Neil Griffiths
5 Silva Avenue
Queanbeyan NSW 2620
Ph: 02 6284 3111

thanks manny


i have just spoken to neil and it will be on its way shortly.

[manny]

thanks manny
i have just spoken to neil and it will be on its way shortly.

Good to hear.
He tells me he's been swamped this morning with interest and there won't be many left at this price as the new batch coming from Japan has gone up !


Would you still have the Hydraulic Fan ECU around and surplus to your needs? I'm looking into the differences between the Chaser, Supra and Aristo ones in the way they control the hydraulic fan and wouldn't mind one or two different ones to compare operation.

PM me if you do rather than go too much more off topic here.

[1JZ.747]

whats the going price for the au thermo fans

or the magna ones?

[CrUZida]

AU's are 200-250 from a wrecker, or 250-350 genuine, depending on where you go and whether you get trade.

Be careful though, I've heard that there are some cheap knock off's from Taiwan that look identical, but the genuine ones are Bosch fans.

[Slim]

The pair of Magna fans cost me $90 from a wrecker. Normally they come as a split shroud that joins in the middle. One fan is an A/C fan and the other is the main cooling fan. I got two of the bigger ones and rivetted the two shrouds together.

[1JZ.747]

looks like i am going with falcon items


$175

[CrUZida]

another thing to watch out for is toyota temp gauges suk ass

when my temps used to get up over 115 on the diag scanner

the temp gauge only moved about 2 or 3 mm

so for it to read close to the red it prob would need to get over 130 degrees

so if u ever have temp probs or are just curious buy a decent gauge

the std gauges wont tell u much

Hey Sideshow.
The reason why your guage does this is because its not supposed to move much until well over 110deg.
The factory thermo fan switch in the 80's 4-runners doesnt turn on till 110degC.

I'd assume that the Hilux guage is the same as the 4-runner guage.

[ProjectSleeper]

Shane,
What are you getting to actually "control" the Fans ???

[amichie]

I think the best measure of how much air a fan is going to pump is the power of the drive motor. Davies Craig 16 inch is a 19 Amp or about 220 Watt motor.

A fan belt driven fan can easily suck a few Horse power out of a motor. Thats more like 2000 Watts.

Consider this when comparing electric versus hydro, viscous or straight mechanical fans.