Take off....Very loud!

[Prakesh]

Hi All, Im not sure if this is the correct place to post this thread but i havent been here for so long and the entire site has had a overhaul.

Ok the problem is, when i take of, 1st gear, the car will gradually increase in a loud sound, at about 2500- 3000 rpm, it becomes very loud, a bit like what it sounds like when you initially take off when the car is still a bit cold. I have always had this sound when i use to take of and the car was just warming itself up. The sound actually over takes the sound of my K & N and the factory BOV, not totally over takes it but it halves the original sound.

But now its a constant annoyance at the rpm that i mentioned about 3000. It doesnt only do it in 1st, 2nd and third are pretty much the same only slightly less loud. 4th and 5th i dont really hear too much of it.

I dont think its the exhaust, although i have on of those silent exhausts, it isnt very loud at all so it could have something to do with it.

Sounds a bit like the old ford falcons, big windy sound.

Well i hope ive explained it well.

Any help would be greatly appreciated.

Cheers guys!

[someonestolecc]

That's the worst explanation I've ever heard

Is it a sucking sound? Check your air filter it might not be cupped/tightened properly. Check your air intake pipe it might have loosened from the turbo.

Is it a big boomy sound? Check your cat and exhaust a screw may have loosened from the dump pipe or near the cat.

Is it a grindy noise? No idea check everything (could be the gearbox/wheel hub/engine who knows).

Does it do it when you rev in neutral ?

More info

[sdm33]

I think it could be your engine fan. If the clutch on it seizes it stays on full time and starts revving with the engine causing a 'windy' sound. To check open your bonnet and rev your engine, if the fan is stuffed you will feel the breeze, your hood lining will probably show some wear too. If this is the problem, the vl turbo fan clutch fits and can be had reasonably cheaply.

[crack]

I think it could be your engine fan. If the clutch on it seizes it stays on full time and starts revving with the engine causing a 'windy' sound. To check open your bonnet and rev your engine, if the fan is stuffed you will feel the breeze, your hood lining will probably show some wear too. If this is the problem, the vl turbo fan clutch fits and can be had reasonably cheaply.

i agree. the clutch fan on my falcon seized and was "windy" as all fu(k

[tridentt150v]

Not yr turbo spooling???

[Zahos]

i agree. the clutch fan on my falcon seized and was "windy" as all fu(k

I have also had this problem on my R31, seen it on a few other cars too.....

when the car is cold and engine off, turn the fan in the engine bay... if it turns very easily, it's fine, otherwise, the clutch on the fan is gone

in case you don't know what the clutch is, it is the the thing the fan is bolted on to.

[VL-TRBO-RB20]

yeah i just replaced mine sam sold me one for $50 and it took about 20 mins to take off the old one n fit the new one!

too easy really he told me just dont drive it far because if it comes off have fun looking for a new radiator

[Prakesh]

Hi, It sure does the same thing in nuetral, Definately not the turbo spooloing :-)

I had a look at the fan yesterday, it has a slight freeplay of about the length of your palm, other than that it pretty solid.

I will check the piping and K & N.. etc and get back to you guys.

Cheers!

[Zahos]

if the engine was cool, and it only had that much movement. then you have found your problem.

[ecl]

hi, sory to hijack

i have a tip (dont laugh!!) and it also makes a big vacuum cleaner windy sound above 3000rpm on 1st. I have a stock airbox/airfilter so its suppose to be fairly quiet. Not sure if its the turbo spooling as its very loud (well quite).

to check if its the fan , do i just chuck it to N and rev? I dont think it makes a sound then though... so maybe its something else?

[caminperth]

If it is the fan clutch - be careful.. it hangs off the water pump shaft.. reving it too high could damage the water pump..

[ecl]

I have also had this problem on my R31, seen it on a few other cars too.....

 

when the car is cold and engine off, turn the fan in the engine bay... if it turns very easily, it's fine, otherwise, the clutch on the fan is gone

in case you don't know what the clutch is, it is the the thing the fan is bolted on to.

how would you define turning easily?

i tried turning it and it turns pretty easily but it doesnt move alot ... err. what i'm saying is when i try to spin it, it spins like 10-15cm but its smooth action.. i.e it does not do a full revolution but moves only 10-15cm.

is this normal?

edit: ok, just tried it in neutral and it still made the windy sound..better get it checked out asap

[Zahos]

if u try turn it whith the engine off after a drive it may or may not turn depending on how hot the clutch got. (the hotter it gets, the more it clamps and the less you can turn it)

if u try turn it after it has been sitting there for a while - eg: first thing in the morning, and you cannot spin it freely continuously, then it needs changing

[Prakesh]

Hi, all the sugns seem to be pointing to the fan clutch as the other things such as piping and k & n are all fine and in place.....definately not the turbo... :-)

I will try turning the fan again today when i get home as i havent driven the car at all today so the temp for checkin should be good.

so what im looking for is for the fan to turn pretty easily right? if it only turns 15 to 30 then stops is when i should be worried??

Well sdm33 said the part comes pretty cheap so its not that bad,

Cheers Fellas

ill update 2moro.

[caminperth]

the fan shouldn't keep running at high revs.. the clutch should let go way before redline.. if it's still spinning up high - regardless of temp - you have a prob with it..

[Prakesh]

Ok, ive checked the fan again last nite, it turns easily, i initially didnt turn it with a bit of force but when i tried it last nite, it turns perfectly......the car was sitting in the garage all day so the temp factor is out of it too.

now, what are we left with? i think something to do with the exhaust system maybe?

Dunno ?

[Drivebai]

What does this "windy" sound, sound like?.

The fan is spose to be on all the time when the engine is on right?

its hard to try and spin mine freely as i have aftermarket intercooler.

[The Dan]

CHECK TO SEE IF THE FAN SPINS FREELY WHEN THE CAR IS HOT!!!

Does it get louder in 2nd and third at roughly the same RPM

ie..Does the noise sound the same at 3000 rpm in every gear or does it sound louder in first at 3000 than it does in 3rd at 3000?

if the noise is the same at these rpm's then look for something that doesn't spin at the same revolution as the engine (turbo maybe)

On a sad note...it could be your main or big end bearings.

Is it a WINE-DEE noise or a WIN-DEE noise?

[The Dan]

also check your carrier bearing (in gearbox) When these flog out they make a windy sorta noise.

[Sumo]

how far is my crutch supposed to spin when the car has been stopped after a hard run up the mountains?

Sorry guys, I had to laff