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Dec 3, 2006 | 02:51 AM

G35betty

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Fan Noise

My G35 Sedan 03.5 has been making a loud fan noise after the engine warms up. I took it into the dealer, but of course they didn't hear anything. Anyone else have this issue? I would just like to identify it so I can fix it. Thanks!

Dec 3, 2006 | 12:38 PM

DaveB

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If it's just a roaring sound that lasts for a minute or so when you first start the car, it's normal. It's the mechanical fan.

Dec 12, 2006 | 01:33 AM

G35betty

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Ahh The Mechanical Fan

The fan noise continues even after it is warmed up. It seems that the warmer the car is, the more it "roars". Is this normal?

Dec 12, 2006 | 01:52 PM

Augy

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From: SCV/SFV -661.818-

Mine does that when its cold. After 3-5 minutes of driving it goes away. Just normal to me.

Dec 12, 2006 | 02:52 PM

cato

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Quote:

Originally Posted by DaveB

If it's just a roaring sound that lasts for a minute or so when you first start the car, it's normal. It's the mechanical fan.

I thought the 2003.5s came with the electrical fan, only us lucky 2003s have the belt driven one?

Dec 12, 2006 | 03:44 PM

G35Luv

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I have an 03.5 and I have the Belt driven one.

Dec 16, 2006 | 11:56 PM

andycon

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the early 2003's have a mechanical fan, which spins fairly freely at high revs, or when cold, but engages at lower revs, and especially when hot. They can be pretty noisy when hot and idling. I swapped mine out for an electric fan setup - do a search for e-fan conversion. It's a bit of a job, but worth it in my opionion.

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Dec 17, 2006 | 03:11 AM

G35Luv

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I'm very interested in doing the e-fan conversion. Who does it or can do it and how much does it cost?

Dec 17, 2006 | 08:31 AM

phonedrn8

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????????????????/ got me on that one.
sound like bearing heating up

Dec 17, 2006 | 08:36 AM

#10

Nismo G

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im pretty sure my fan is electric.....i dont see any belts down there??

Edit: also had a front end collision in early 2004....maybe the body shop changed it or something...???

Dec 17, 2006 | 12:12 PM

#11

GeeMan

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Quote:

Originally Posted by Nismo G

im pretty sure my fan is electric.....i dont see any belts down there??

Edit: also had a front end collision in early 2004....maybe the body shop changed it or something...???

That would be the only way you would be electric even then doubtful. There's more to the e-fan conversion than just dropping in a fan and a connection or two. I doubt the shop would do that without your consent and then there would be objections from insurance. Look closer.

Dec 17, 2006 | 01:39 PM

#12

DaveB

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From: Kansas City

Quote:

Originally Posted by Nismo G

im pretty sure my fan is electric.....i dont see any belts down there??

Edit: also had a front end collision in early 2004....maybe the body shop changed it or something...???

The coupes don't have mechanical fans.

Dec 17, 2006 | 01:40 PM

#13

DaveB

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From: Kansas City

Quote:

Originally Posted by G35Luv

I'm very interested in doing the e-fan conversion. Who does it or can do it and how much does it cost?

There is a guy in LA that does the e-fan conversion. It costs about $250-350 in parts and a few hours labor. I'd definitely consider doing it, but the dyno and 1/4 mile results have been inconclusive there I'm not going to waste my time and money.