Alternator replacement procedure
Joined: May 2005
Posts: 2,174
Likes: 77
From: Santa Clara, CA
Alternator replacement procedure
Just replaced an alternator on an 03 G35 Coupe 5AT last night with the electric fans. To get the alternator out I just followed the FSM instructions, however, the instructions were somewhat incomplete in that they did not instruct to disconnect the upper radiator hose and to unbolt the AC line bracket on the driver's side. There is no way that the cooling fan assembly could've been removed without loosening the AC line and disconnecting the upper radiator hose.
The reason the cooling fan assembly really needs to come out is because the main alternator mounting bolt is too long to be removed if the cooling fans are in place. Luckily though, the cooling fan assembly comes out really easily, just 2 screws on top, a plastic reusable zip tie on the bottom; alongside two electric connectors.
Just some useful tips for anyone trying to tackle this.
The reason the cooling fan assembly really needs to come out is because the main alternator mounting bolt is too long to be removed if the cooling fans are in place. Luckily though, the cooling fan assembly comes out really easily, just 2 screws on top, a plastic reusable zip tie on the bottom; alongside two electric connectors.
Just some useful tips for anyone trying to tackle this.
Joined: Mar 2009
Posts: 18,299
Likes: 1,488
From: By the sea, Tx
G35 sedan w/ too much money in mods

Just replaced an alternator on an 03 G35 Coupe 5AT last night with the electric fans. To get the alternator out I just followed the FSM instructions, however, the instructions were somewhat incomplete in that they did not instruct to disconnect the upper radiator hose and to unbolt the AC line bracket on the driver's side. There is no way that the cooling fan assembly could've been removed without loosening the AC line and disconnecting the upper radiator hose.
The reason the cooling fan assembly really needs to come out is because the main alternator mounting bolt is too long to be removed if the cooling fans are in place. Luckily though, the cooling fan assembly comes out really easily, just 2 screws on top, a plastic reusable zip tie on the bottom; alongside two electric connectors.
Just some useful tips for anyone trying to tackle this.
The reason the cooling fan assembly really needs to come out is because the main alternator mounting bolt is too long to be removed if the cooling fans are in place. Luckily though, the cooling fan assembly comes out really easily, just 2 screws on top, a plastic reusable zip tie on the bottom; alongside two electric connectors.
Just some useful tips for anyone trying to tackle this.
Joined: May 2005
Posts: 2,174
Likes: 77
From: Santa Clara, CA
Yeah man had to give you a couple thanks since you have done a lot for the community and asked for nothing back in return. Appreciate all your work and look forward to more guides and videos.
^ +100 Your contributions are what make communities like this really useful. I, and I'm sure many others, thank you.
Oh, and the FSM for my 04 does say you need drain and remove upper radiator hose to remove the fan assy. gottta follow all the links in the manual but it's there.
Oh, and the FSM for my 04 does say you need drain and remove upper radiator hose to remove the fan assy. gottta follow all the links in the manual but it's there.
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