GQ Factory Thermo and clutch fan

[beretta]

Hi all,

I need some help, had a look in the bible and searched.....Been doing a few long trips lately in the heat and my factory thermo is doing nothing and neither is the clutch fan, my GQ has done 480k's+ so its understandable that they're f*#ked. I would like to add a bigger thermo fan and retain the clutch fan (and get it working!), has anyone done any mods in this area, can you help me out with some guidance?
If I add a bigger thermo is it better at the front of the rad pushing air through or on the engine side pulling air in(factory one is a pusher)?

Thanks for the help!

Cheers,

Paul

[bogged]

Through or on the engine side pulling air in(factory one is a pusher)?

Thanks for the help!

Cheers,

Paul

you have to work out if its really going to be any assistance since when you have it off it will be blocking more air.

Also the Clutch fan working against the thermo fan. THe clutch will try and suck air that maynot be enough due to the differences in volumes from the clutch to the thermo
EG, thermo may push 10ltr, the clutch may suck 20ltr. NFI on volumes just an example.


once you rebuild the clutchfan, you should have no problems or need for more air.

[beretta]

[quote="bogged]
once you rebuild the clutchfan, you should have no problems or need for more air.[/quote]

So have you rebuilt the clutch fan on yours before? Would I be better off going to a wreckers and getting a new/second hand replacement?

[ozy1]

is your rig petrol or diesel, i didnt notice it mentioned in your post,
if its petrol, its a sealed unit, if the clutch is shot, there isnt much you can do about it, but you can go to Repco, and purchase a Clutch hub to suit the Diesel, these are rebuildable, which is better for the future, but you will also have to buy a set of blades to go with is, if you ask Screwy, he may have the Part numbers for you to order,

If you have a diesel, you can rebuild the hub, its easy to do, i have done it to my wagon, simply take off car, remove 4 or 6 bolts to seperate it, remove all silicone fluid, and replace, the fluid you have to get from Toyota, as they are the only ones who stock it, nissan dont, there are previous write ups on here somewhere,

once you have a good clutch hub and fan, you should have no over heating dramas,

[patrol man]

you can buy silicon oil to put it the clutch, toyota sell it, this is to replace the oil that it has lost, you need to disassemble the clutch then pour in the new oil and reassemble it before it runs out, as it is quite thick. this worked for me ,for a year or so, then i fitted a gu clutch,this didnt quite fit, it needed a small modification ,lost about a horse or so , now when i rev all i can here is the fan whirring. cheers Phill.

[pongo]

My cousin opened his old hub up and put 2 bolts in it locking it solid. Seems heaps better than the new hub he bought recently. It pulls heaps of air now.

[bogged]

So have you rebuilt the clutch fan on yours before?

Yup..
.
http://www.off-road.com/~estegall/tech/ ... lutch.html

The Part # for the fluid is in the PARTS # thread

[mick355]

I don't quite understand the difference between the petrol and deisel hubs. I managed to seperate the haub on my petrol and fill it with oil. Was i just wasting my time? or has someone already fitted the deisel hub?
Cheers Mick.

[jessie928]

pongo, your heading fo a recipe for disaster when you lock the blades of a clutch fan, and you are sucking a gigantic amount of HP from the engine.

As for fan replacement, the factory thermo is only for the AC system.
toss the origional clutch fan and put in a set of EL falcon thermo's complete with cowling.

Jes

[hottiemonster]

I don't quite understand the difference between the petrol and deisel hubs. I managed to seperate the haub on my petrol and fill it with oil. Was i just wasting my time? or has someone already fitted the deisel hub?
Cheers Mick.

sounds like someone has fitted a diesel one, as i tried to do it with my petrol one and i couldnt, so i got some oil at home doing jack shit. Unless i just got the shit one.

[ozy1]

I don't quite understand the difference between the petrol and deisel hubs. I managed to seperate the haub on my petrol and fill it with oil. Was i just wasting my time? or has someone already fitted the deisel hub?
Cheers Mick.

mate your rig is petrol, what motor do you have, is it the 4.2L or the 3L, because i knoe for sure the petrol 4.2s came out with a sealed unit from factory, but i heard a roumour that the 3L Petrol had the ability to be pulled apart, i may be worng, on the second bit about the 3L,

[bogged]

I don't quite understand the difference between the petrol and deisel hubs. I managed to seperate the haub on my petrol and fill it with oil. Was i just wasting my time? or has someone already fitted the deisel hub?
Cheers Mick.

sounds like someone has fitted a diesel one, as i tried to do it with my petrol one and i couldnt, so i got some oil at home doing jack shit. Unless i just got the shit one.

u dont want the fluid anymore, I'll grab it, I got a spare clutchfan that needs it

[hottiemonster]

I don't quite understand the difference between the petrol and deisel hubs. I managed to seperate the haub on my petrol and fill it with oil. Was i just wasting my time? or has someone already fitted the deisel hub?
Cheers Mick.

sounds like someone has fitted a diesel one, as i tried to do it with my petrol one and i couldnt, so i got some oil at home doing jack shit. Unless i just got the shit one.

u dont want the fluid anymore, I'll grab it, I got a spare clutchfan that needs it

i just found out i need a new clutch fan this morning as it has seized up, my viscous hub is non rebuildable to i will try and get my hands on a rebuildable one.

Bruce, do u need a spare clutch fan, it would suit my car nicely

[bogged]

i just found out i need a new clutch fan this morning as it has seized up, my viscous hub is non rebuildable to i will try and get my hands on a rebuildable one.

Bruce, do u need a spare clutch fan, it would suit my car nicely

andrew has it at the moment...

[mick355]

Hottie monster- Mines the 4.2l petrol. So by all accounts its been swapped for the diesel unit? I just undone the bolts a little and gave it a crack with the plastic hammer and apart it came. Inside theres centrifical grooves running around.
Cheers.
Mick

[ozy1]

Hottie, if you fit a rebuildable, one you also have to change your fan as well, as they are a different bolt patturn between petrol and diesel,

if you go to repco, you can buy a new diesel viscous hub, and new plastic fan tyo suit, all bolts on no dramas,

[bogged]

also the VL Commodore one fits Hots..

[hottiemonster]

Hottie, if you fit a rebuildable, one you also have to change your fan as well, as they are a different bolt patturn between petrol and diesel,

if you go to repco, you can buy a new diesel viscous hub, and new plastic fan tyo suit, all bolts on no dramas,

yeah i have been told they are slightly different in size to, around 8-10mm

my plan was to go and get one from repco, anyone had any dramas with the repco units? also cost?

been told the viscous hub is around 130, fans normally are about 65

[hottiemonster]

also the VL Commodore one fits Hots..

vl commodore fan fits on a diesel viscous hub?

what about the VL viscous hub and the fan onto the GQ water pump pulley?

[BowTieGQ]

Bloke next door is a rep for an auto elec company that also sell heaps of auto accessories, even viscous hubs. Last one he bought for a mate was to suit Pajero. Mitsubishi price was about $380 and he got it for about $140. Unsure on Patrol price. GST inclusive and receipt included as it's all legit. Everything is cost plus GST. I'll get a price on petrol and diesel hubs. Taking orders?

[hottiemonster]

Bloke next door is a rep for an auto elec company that also sell heaps of auto accessories, even viscous hubs. Last one he bought for a mate was to suit Pajero. Mitsubishi price was about $380 and he got it for about $140. Unsure on Patrol price. GST inclusive and receipt included as it's all legit. Everything is cost plus GST. I'll get a price on petrol and diesel hubs. Taking orders?

price on a diesel one if possible

[chimpboy]

I have a couple of used fans and clutches - one fan is good, one clutch is good, but they don't fit together as they have slightly different bolt spacing. The second clutch is seized but may be rebuildable.

Let me know if you want me to measure them or anything. I doubt I will ever use them; if my fan clutch went I would probably just go the Ford electric fans, since I can get them cheap.

Jason

[croozer]

what do you call cheap and can you get them for anyone. I just rang a wrecker on sunshine coast and he said $150 for fans and cowl

[chimpboy]

what do you call cheap and can you get them for anyone. I just rang a wrecker on sunshine coast and he said $150 for fans and cowl

I'll find out! What model falcons are the choice? Is it EF to EL or is later okay too?

[coke]

I replaced the hub on my 90 GQ with one from that mob in GYMPIE, I think theyre the 4WD wreckers there, when I was on my way to Fraser XMAS 04. It fixed the problem for a while.

This week I have fitted a new 3 core radiator and a 160 degree thermostat and the thing was as cool as a cucumber coming home this arvo in Brisbane, probably a 30 deg day. Last week on the way to the GC it ran around 3/4 the whole way. Today I am running about 1/3 to half.

My hub cost me $130 and I fitted there.

Radiator was $440 plus fitting
Thermostat was $40

Andrew

[beretta]

I replaced the hub on my 90 GQ with one from that mob in GYMPIE, I think theyre the 4WD wreckers there, when I was on my way to Fraser XMAS 04. It fixed the problem for a while.

This week I have fitted a new 3 core radiator and a 160 degree thermostat and the thing was as cool as a cucumber coming home this arvo in Brisbane, probably a 30 deg day. Last week on the way to the GC it ran around 3/4 the whole way. Today I am running about 1/3 to half.

My hub cost me $130 and I fitted there.

Radiator was $440 plus fitting
Thermostat was $40

Andrew

Thanks for the replies, coke what made you go for a 160degree thermostat?
Mine has got a stock rad in it, but it has been recored, the temp gauge sits on about 1/2 most of the time or a bit less, last time I drove up to Sydney it as a 35+ degree day and on the long hill climbs the temp started to get up a bit high, like 3/4+, and the fan didn't work at all, couldn't hear it anyway? So I'm going to have a crack at fixing it this weekend, just gotta find a Toyota dealer in North Sydney somewhere, I've got no idea where to go in Sydney.

[coke]

I was advised to do that by the rad guy. Living in BNE where the temp gets up along with the humidity, plus running the turbo which makes it run hotter, AND running a set of 35s. Thats what the decision was based on.

On another note, I was told that the thermo fan only woeks with the AC, not actually as a thermo fan in the true meaning of the word, as in when the temp reaches a certain level. Mine never has anyway, and thats in a 90 GQ ST 4.2 diesel...

Andrew

[beretta]

I was advised to do that by the rad guy. Living in BNE where the temp gets up along with the humidity, plus running the turbo which makes it run hotter, AND running a set of 35s. Thats what the decision was based on.

On another note, I was told that the thermo fan only woeks with the AC, not actually as a thermo fan in the true meaning of the word, as in when the temp reaches a certain level. Mine never has anyway, and thats in a 90 GQ ST 4.2 diesel...

Andrew

So in theory, living in Sydney I could possibly go for a slightly lower thermostat to help with my issues, in Melbourne it wasn't such an issue.

[chimpboy]

I was advised to do that by the rad guy. Living in BNE where the temp gets up along with the humidity, plus running the turbo which makes it run hotter, AND running a set of 35s. Thats what the decision was based on.

On another note, I was told that the thermo fan only woeks with the AC, not actually as a thermo fan in the true meaning of the word, as in when the temp reaches a certain level. Mine never has anyway, and thats in a 90 GQ ST 4.2 diesel...

Andrew

So in theory, living in Sydney I could possibly go for a slightly lower thermostat to help with my issues, in Melbourne it wasn't such an issue.

In theory, I gotta say that I don't agree with the rad guy. The thermostat is designed to keep your engine at a specific, constant, optimal operating temperature regardless of the surrounding temperature. If it is functioning correctly it will do this perfectly provided that the rest of your cooling system (radiator, pump, fan, coolant passages) can handle the heat.

Putting in a lower temperature thermostat will only make your engine run at a lower temperature than it is designed to. And if the rest of your cooling system can't handle the ambient heat, then running a lower temp thermostat won't help because when the engine is running too hot, whichever thermostat you've got is going to be fully open to try to compensate. So, in this case, you get what you always get with a marginal cooling system, and that is temperature variation depending on outside temperature, instead of a basically constant engine temperature. Your lower-temp thermostat makes the engine run too cool when the ambient air is not too hot, and then doesn't keep it from running too hot when the ambient air is hotter.

There is no sense in running your engine cooler than it is designed to run.

Just my opinion.

Jason