R32 and R33 differences in cooling systems?

[West]

Hi, i know for a fact that my old R33 Gtst air condensor fan kicks in on a really hot day/traffic wherther you put the aircon on or NOT, so is my mate s14( so basicly it not only work as an aircon fan but also a BACK UP system ) BUT not on my new R32GTR !!!!

My 32GTR air condensor fan only kicks in IF i have aircon on or otherwise it won't ( i suffered an over-heat the other day due to the amount of 80% blockage in my radiator also my fcuk up clutch fan).

All the heating issue has been sorted out now, my 32GTR now runs constanly on 81, 80 degree ( A big THANK to TROY / YLWGTR for helping me throughout the whole process of getting the problem sort out. That included about 2,3 times flushing the car out, change the thermal stat over...ect..all the phone calls..he's a genius :Pimp2: oh also to ROY for pulling his fan out on his RACE prepared:D 32gtst .

So, i'm pissed off that Nissan didn't make it as a back up fan like the 33 or the s14 BUt i could be wrong about it or its' my car that fcuk!!! I belive its only a wire or two to make it work like the 33/s14 or another word a back up system. Even my brother shit box bluebird, when he switch the inigtion off the fan still work till the car is cool down to a certain temp then its off.

Anyone got rid of their clutch fans and run thermals ( particularly R32gtr's ) please post up some pics, how, which fan, brands....best would be DIY system so i can see.

Also if anyone R32Gtr's aircon fan that work as a back up system what i've stated before please tell me also.

THANKS

[Cubes]

My engine overheat fan on the R32 GTST used to come on with or without the a/c on in hot weather.

This was when it was overheating.

NOW on the otherhand it doesn't.

I think the temp sender must be stuffed as it got up to 109degree's the other day when stationary with the a/c on and 38degree heat.

My clutch fan is stuffed. Its seeping oil out on to the shaft.

I've ran 2 x 12" davis thermo's mounted directly on the radiator. They didn't work.

If you do decide to go thermo's ENSURE you make a shroud for the thermo's to sit on so you get airflow over the whole radiator.

AU twin thermo's and shroud apparently can be made to fit. I am going to look in to this before I replace my clutch fan for $140.

[BHDave]

I'm with Cubes on this one. A couple of thermos stuck onto the radiator isn't as effective as having a proper shrouded set up. I have noticed this on my last 2 cars.

On the other hand, my r32 gtst back up fan still kicks in at about 85 degrees, which means i have 3 fans running at that point and she still gets close to 95 in traffic every day. I will be swapping to a bigger radiator, flushing the whole engine and replacing the thermostat very soon as well. Probably look at making a shroud of some sort as well.

[Cubes]

Dave,

What setup do you have now? Being 3 fans? 2 x 12"?

Is the GTR radiator 3 core? Mine in the GTST is a 2 core.

[West]

My engine overheat fan on the R32 GTST used to come on with or without the a/c on in hot weather.

 

This was when it was overheating.

 

NOW on the otherhand it doesn't.

I think the temp sender must be stuffed as it got up to 109degree's the other day when stationary with the a/c on and 38degree heat.

 

My clutch fan is stuffed. Its seeping oil out on to the shaft.

 

I've ran 2 x 12" davis thermo's mounted directly on the radiator. They didn't work.

 

If you do decide to go thermo's ENSURE you make a shroud for the thermo's to sit on so you get airflow over the whole radiator.

 

AU twin thermo's and shroud apparently can be made to fit. I am going to look in to this before I replace my clutch fan for $140.

My engine overheat fan on the R32 GTST used to come on with or without the a/c on in hot weather.

So it DID WORK with or without the AC on? Interesting to hear, i've got a NEW SENDER and it still only work when AC on otherwise forget it

When you said about 109degree does that mean you have a PFC hand controll where you've got an exact read out?

[West]

I'm with Cubes on this one. A couple of thermos stuck onto the radiator isn't as effective as having a proper shrouded set up. I have noticed this on my last 2 cars.

Yeap, shroud is VERY IMPORTANT so try to run thermal with shroud.

I replace my clutch fan for $140

I got quote by Nissan for $400, $140 is a bargain, where did you get that quote? So i'm wrong about R32 AC fan, they DO work as a back up fan, looks like i've got more study to do now or is it i've got PFC and not the stock ECU ???

Can somebody post a factory wire digram?

[Cubes]

West,

When it was overheating 2years ago the engine overheat fan was coming on with and without the a/c on. It was overheating so it was coming on no matter what.

I then removed the 2 12" thermo's and put the clutch fan on and the engine overheat never came on again.

I've replaced my guage temp and ecu temp senders on the inlet manifold when the new motor went in.

The temp sender that I think is now buggered is located in the bottom tank of the radiator. This is what turns on the engine overheat fan.

I had the car in getting a top radiator tank replaced a while back ($90 Natrad) and apparently the temp sender was activating at 90degree's.

Hence turning on the engine overheat at 90degree's.

109degree's.. I do have a PFC with hand controller.

Up until 105degree's the temp gauge on the dash stays at half. Over that it quickly heads towards hot. 109degree's was only just under the 3/4 mark.

I got moving and temps came down to 88degree's within 5minutes.

$140 for a clutch fan is aftermarket. Its a Davies Craig clutch fan.

That price is from Sprint Autoparts in SA. Its the going price for an aftermarket job.

Just be sure you don't land your self a cheap taiwan clutch fan.

Its interesting you mention about the PFC.

It very well could be that the PFC doesn't support the engine overheat fan hence why it no longer comes on.

The next hot day I will pull out the PFC and hook up the stock ecu.

If the overheat fan turns on then I know it definitely isn't the temp sender in the radiator.

Regardless I am going to eventually wire up the overheat fan to turn on when I hit the A/C button.

I'm also going to box the 100mm bar and plate FMIC up to the radiator so air flows through both a little easier. Every little bit helps.

Even cruising on a cool night it tends to run a little warm (up to 87 degree's when putting my foot in to it @ 100km/h speeds). I put this down to the thick bar and plate fmic and it not being boxed up to the radiator + my clutch fan not working.

[AzzurrA]

Slightly related to this thread

My R32 GTS-t's operating temp is usually around 75 - 76 when driving around... around 81 in stop start traffic on a hot (mid 30's) day. Anyone have any idea why its so low? Is this TOO low?

[predator]

Well I don't know, but my R32 (only gts-t) has the extra electrical fan backup on the front.. today i drove about 200km in fairly stop/start traffic in about 32 degrees and had no problems. I've never had one of my skylines even get close to overheating in normal traffic duties with the stock setup still in place when it is functioning correctly, even on high 30deg days. It's a good system when it works.

West: I believe you should still have the backup fan on GTR.. Obviously, it's probably pretty common that the extra fan is removed in japan (like my old 33). The extra fan should come on above 90deg.. if you don't have it then it's possible.

From reading, I think the GTR also relies on the outside air temperature sensor to turn on the aircon fan. Check/or swap in another to test whether that is the issue..

The aus R32 GTR service manual has some trouble shooting info on thermostats and the like ..

Cubes: interesting.. the kick in temp for the extra fan is 90degrees also.. maybe if it detects the extra fan is not operating it automatically buzzes on the "overheat" light??

[Cubes]

Possibly an aftermarket thermostat OR the temp sender is reporting slightly different.

The aftermarket thermostats tends to open earlier and open much more than the genuine items.

Aftermarket thermostats also take longer to get to operating temp. The aftermarket thermostats I've played with anyhow.

Take not how long it takes to come up to temp. Mine will come up to 80degree's within 1.5-2km's from a cold start and instant slow drive off. I don't warm up my cars. I get them moving and warmed up ASAP.

One down side with the aftermarket thermostats is I found under heavy loads in the VL's they tend to cause slight overheating due to the coolant flowing too quickly through the radaitor. I'm unsure if this will be a problem with the Skylines.

Chris32 appears to be also running a aftermarket thermostat and has similiar but still cooler temps to Azzurra. He has had his down at Mallala and didn't see any excessive water temps so the aftermarkets must work well in the RB's. He's also running a N1 waterpump.

Cooler running = more power but less fuel economy. Within reason obviously.

[AzzurrA]

i usually warm my cars up for 10 minutes before i go out, but i will take note of how long it takes if i drive off straight away and get back to you

[Cubes]

Overheat light?

When the clutch fan and radiators are clean the temps don't vary by much. My clutch fan at the moment is definitely shagged. It has a oily type crap leaking down the center shaft.

[predator]

lol - well i've never seen one so I don't know.... when the car overheats don't you get the "Check engine" light?

[West]

 

West: I believe you should still have the backup fan on GTR.. Obviously, it's probably pretty common that the extra fan is removed in japan (like my old 33). The extra fan should come on above 90deg.. if you don't have it then it's possible.

From reading, I think the GTR also relies on the outside air temperature sensor to turn on the aircon fan. Check/or swap in another to test whether that is the issue..

Yes i do still have the AC fan and works as well, work when AC is on. It's just that before when i had the over heat problem my sender was fcuk, after chuck a new one in it still only work when AC is on and at that time i still have the heating up issue but now after having the radiator clean out, chuck new clutch fan in temp has been constantly around 80/81.

What i'm saying is it should work whether AC is on or not! Some wire gotta be missing .

[West]

Yes, the 32Gtr seem to get to operate temp REALLY FAST, with my old 33gtst i also NEVER had a problem with the heating issue and it'll take a while to get to operating temp.

[West]

Oh yeah two weeks ago i got stuck in the traffic and temp reading was something like 109. At this point i pulled over, had the bonnet up and i could hear the thing is boiling. Went back in the car hit the AC button and the bloody air condensor fan came on. How stupid, it should get turn on whether AC is on or not.

Anyway where can i get a Nismo thermalstat in Vic or order one from other states, apperantly they open earlier and wider as well.

Also i was advise by the radiator place that they told me to go and get Nissan issue coolant, they reckon you can't go wrong with that.

[BHDave]

Dave,

 

What setup do you have now? Being 3 fans? 2 x 12"?

 

Is the GTR radiator 3 core? Mine in the GTST is a 2 core.

Yep, i run 2 x 12 inch fans plus the factory electric fan, had to remove the viscous fan to fit my cooler piping in when my engine swap was done. There is bugger all clearance between the engine and bonnet to get anything over the top of it as i had originally planned.

I dont know if the gtr radiator is a 3 core, my gtst also has a twin core.

As someone else mentioned on the r32 temps, mine was almost always smack on 75 degrees with the rb20, It would peak at about 85 in traffic or after a prolonged flogging. Only time it ever came close to overheating was a 40 degree day with the air con on and stuck at the toll gates on the M5 for 15 mins.