Jump to content
SAU Community

Recommended Posts

Ok so when I first got my car it was back in October last year, I never used to notice the clutch fan come on and flick off. Now it seems like once the car has reached normal operating temperature the fan will be on most of the time which has prompted me to write this.

My question is basically what is the normal actuation and cut out parameters for the r32 gts-t clutch fan. I've been led to believe that clutch fans will also cut out at a certain rpm but mine doesn't and continues to wind up well past 4000 rpm.

Then its seized mate, if its an RB20 or 25 you can get replacement fans from Repco for around $100...I had same issue with the one on my GTR, was just sticking on and sounded like a cessna not to mention the motor felt held back...I couldnt find an aftermarket replacement for RB26 (the snout on the hub is longer on the 26 vs 20/25) so I went to an Electric fan and sealed it in the factory shroud.

Exactly the response I was after mate thanks.

I think mine may have become seized after it wore itself down a bit on my IC piping. Was making the most minor contact with the IC piping after the restraint broke its weld and probably over time it has slowly shat itself.

Unfortunate to hear about the rb26 fan not being an easy replaced item...

<cut>

Unfortunate to hear about the rb26 fan not being an easy replaced item...

Can be replaced, have a look through my older posts. I'm sure I've mentioned the part multiple times as I had it replaced.

It wasn't cheap though...

Ok so when I first got my car it was back in October last year, I never used to notice the clutch fan come on and flick off. Now it seems like once the car has reached normal operating temperature the fan will be on most of the time which has prompted me to write this.

My question is basically what is the normal actuation and cut out parameters for the r32 gts-t clutch fan. I've been led to believe that clutch fans will also cut out at a certain rpm but mine doesn't and continues to wind up well past 4000 rpm.

do you mean that it is roaring loudly all the time, or can you simply hear it spinning/drawing air? if it is the latter, then that is how they work. they spin whenever the engine is moving, however when the engine gets hot they engage more and spin a bit faster (and therefore are louder). if it is roaring all the time then the clutch may be stuffed or you may have an overheating issue (don't trust the stock gauge too much).

do you mean that it is roaring loudly all the time, or can you simply hear it spinning/drawing air? if it is the latter, then that is how they work. they spin whenever the engine is moving, however when the engine gets hot they engage more and spin a bit faster (and therefore are louder). if it is roaring all the time then the clutch may be stuffed or you may have an overheating issue (don't trust the stock gauge too much).

Appreciate your thought mate...

My fan's behaviour is irratic to say the least. I guess the main things it does are...

1) Drive to work in the morning - I don't really hear it present which is consistant with the cooler morning temps so I know I don't have an overheating issue and throttle response is excellent, supporting the fact the fan isn't engaged fully.

2) Drive home from work - the fan will be spinning most of the time with it roaring its shit off all the way through the rev range, really annoying as you loose bulk power.

It seams as if once it kicks in, it stays kicked in...like its half broken or something.

The clutch will engage the fan but wont disengage it once it is "fully engaged". I've also noticed that before i had my IC piping fastened to the engine with a metal bracket, the fan had been rubbing on the IC piping and has shaved a bit of plastic of every vain. Could this friction have caused the clutch to wear?

Edited by plan-b

If the clutch is still free spinning with the engine off (and cold) then I dont see you having the problem of it "locking on" when it reaches temp. This would indicate that if the clutch was worn that it would not engage fully at all. But they do free spin normally

Please tell us a bit more info, firstly, What temps are you driving in when it is fully engaged. And secondly how hard are you driving it/how long are you sitting in hot traffic etc, and even what speeds you are doing

It may be a case of your car getting up to temp and then never getting below the temp in which the clutch fan engages. That would mean your clutch is operating fine its just the conditions are keeping it engaged.

Also, are you sure its not still rubbing? As I've said before I never even notice my fan come on, doesnt really seem to rob any power. And I wouldnt think that the RB20's are that inferior that there losing half there power because of a fan lol

If the clutch is still free spinning with the engine off (and cold) then I dont see you having the problem of it "locking on" when it reaches temp. This would indicate that if the clutch was worn that it would not engage fully at all. But they do free spin normally

Please tell us a bit more info, firstly, What temps are you driving in when it is fully engaged. And secondly how hard are you driving it/how long are you sitting in hot traffic etc, and even what speeds you are doing

It may be a case of your car getting up to temp and then never getting below the temp in which the clutch fan engages. That would mean your clutch is operating fine its just the conditions are keeping it engaged.

Also, are you sure its not still rubbing? As I've said before I never even notice my fan come on, doesnt really seem to rob any power. And I wouldnt think that the RB20's are that inferior that there losing half there power because of a fan lol

Ok...

When its fully engaged the guage reads a bit under 2/3, when its not fully engaged it reads a tad over half - in other words it seems to be spot on.

I think you're right with the "car getting up to temp and then never getting below the temp in which the clutch fan engages".

I will have a look to see whether it is still rubbing on the IC piping but it is fastened by a piece of stainless, tig welded to the ic piping and bolted into the head (looks quite original and cool).

When the fan is fully engaged I drive conservatively and dont boost up that much, it is considerably less responsive and if I was to raise the revs the fan would spin all the way to 7000rpm.

Is it possible that the cooling capability of a fan with all its vains shaved down a bit would be less than one in new condition? And consequently this change in cooling capability is causing the engine to not drop that extra couple of degrees to disengage the fan?

We're getting there ay lol

your dropping the surface area available for shifting air by having it "rubbed down" by the intercooler pipes. So yes you have decreased the efficency of the fan. Is it enough to cause issues? Hard to say

your dropping the surface area available for shifting air by having it "rubbed down" by the intercooler pipes. So yes you have decreased the efficency of the fan. Is it enough to cause issues? Hard to say

Yeah tis ay. I might just go the davies craig route using the current shroud...

go to the wreckers and get one off a nissan patrol, unbolt the fan and buy the clutch, the guys at the counter wont know wtf it is and charge you 20 bucks

Which model exactly? I know Patrols have RB30s but the 26 fan will not go on a 30 hub, tried it and the bolt holes dont line up. Also, the 30 fan/hub assembly will not clear the 26 top radiator hose in a 32 GTR either, tried that too.....

I know the 26 hub can be replaced, but to buy one Genuine Nissan is 100s...I got a 16 fan and have also incorporated the air con fan, so one is pushing, one is pulling, works well. Was alot cheaper than a new Genuine hub.

Edited by NSNPWR

When its fully engaged the guage reads a bit under 2/3, when its not fully engaged it reads a tad over half - in other words it seems to be spot on.

If you're talking the factory gauge, then it basically stays in the middle from about 60C -> 115C - it won't raise past middle on the gauge until it passes well over 100C. Keep in mind that the gauge isn't linear at all - you really need something like CONSULT or a PowerPC to read the real temperature.

So that means if your gauge is moving past that center part - past where it gets to just after it's warmed up - then it sounds like you have a major overheating issue - and it's probably a good thing the clutch fan is kicking in as it could be stopping the car from completely overheating.

Have you had the radiator checked out at all?

If you're talking the factory gauge, then it basically stays in the middle from about 60C -> 115C - it won't raise past middle on the gauge until it passes well over 100C. Keep in mind that the gauge isn't linear at all - you really need something like CONSULT or a PowerPC to read the real temperature.

So that means if your gauge is moving past that center part - past where it gets to just after it's warmed up - then it sounds like you have a major overheating issue - and it's probably a good thing the clutch fan is kicking in as it could be stopping the car from completely overheating.

Have you had the radiator checked out at all?

^^same. middle of the gauge for me= 70-90c. 2/3 for me is about 105

  • 5 months later...

just thought id post here instead of starting a new one. my stag has been doing exactly the same as plan failure's car. my fan spins freely when cold. it works normally most the time, but at higher rpm its not disenaging. its definately not over heating. does that mean its stuffed??

also to comment on what NSNPWR said, the r32 fan hub may not fit on a patrol rb30 water pump, but the fan hub from an RB25 neo most definately does. i just tried it on the 30 in my shed and it fits perfectly. so maybe the rb25 neo and patrol fans are the same???

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...