Page 1 of 1

Noisy radiator cooling fan

Posted: Sun Nov 03, 2019 10:06 am
by davidmpye
Hi all,

My Nissan Leaf (UK, 2014), has developed a really noisy cooling fan. The fan motor in question is the one that cools the radiator, not the 'blower fan' for the interior.

It would appear the bearings in the motor have gone. I've removed the fan assy and the motor from the vehicle, and it is indeed noisy.

Has anyone ever dismantled these and changed the bearings?

David

Re: Noisy radiator cooling fan

Posted: Sun Nov 03, 2019 1:00 pm
by LeftieBiker
I'll find the appropriate topic later, and add this to it.

Re: Noisy radiator cooling fan

Posted: Mon Nov 04, 2019 8:36 am
by davidmpye
Hi!

Just as a follow up!

Now done - took the radiator fan assembly out, dismantled the fan, replaced the bearings, noise gone.

For reference, in case anyone else needs to do this:

Original bearings;

Large bearing: 608Z (NMB)
Small bearing: R-1560KK (NMB)

Replacement bearings:

Large 608Z
Small: 696ZZ (same size, also shielded, but not from NMB).

For what it's worth, both left and right sided fans (as you'd expect) have the same bearings. Might get round to writing a howto sometime...

Ordered both from amazon prime, arrived next day. Unsure of quality or how long they'll last, but we'll see.....

David

Re: Noisy radiator cooling fan

Posted: Mon Nov 04, 2019 9:06 am
by Nubo
davidmpye wrote:
Mon Nov 04, 2019 8:36 am
...For what it's worth, both left and right sided fans (as you'd expect) have the same bearings. Might get round to writing a howto sometime...
Equally helpful would be explaining what resources and methods you used to determine the correct bearing designations.

Nice repair! I love fixing things that are meant to be replaced.

Re: Noisy radiator cooling fan

Posted: Tue Nov 12, 2019 4:17 pm
by davidmpye
Sure, will see what I can do :-)

So, the large bearing was easy. It's got 608Z written on the side, so I simply ordered a 608Z beaing :-)

The small bearing was slightly trickier: It's writing on the side said R-1560KK (NMB)

Now, I couldn't find that for sale other than in large numbers directly from China, which wasn't very helpful.

However, I *did* find an NMB part number breakdown.

So, the breakdown was as follows:

R - series minature bearing
15 - 15mm outer diameter
60 - 6mm inner diameter

(depth specified in the NMB chart as 5mm)

The KK means the bearing has metal shields each side to protect the balls (the options are open - never really seen in cars etc, sealed (rubber seals but without metal protection) or shielded (rubber seals protected by metal sides).

So, looking aroudn, the 696ZZ bearing is a generic part number (ie not just NMB) for a 15x60x5mm bearing with metal shields.

Seems to work just the same as before - noise gone :-)

Particularly pleased that it is not a repair Nissan would've offered, they'd have wanted hundreds of pounds to replace the fan unit.

:-D

David

Re: Noisy radiator cooling fan

Posted: Thu Nov 14, 2019 6:59 am
by davidmpye
PS I have lots of photos of the repair- is it possible to attach to posts?

Re: Noisy radiator cooling fan

Posted: Thu Nov 14, 2019 2:08 pm
by LeftieBiker
You have to upload the photos to a site like IMGUR and then link the images here. Don't try Photobucket! And thanks for being willing to share the procedure.

Re: Noisy radiator cooling fan

Posted: Sun Feb 09, 2020 6:06 am
by arnis
I recommend https://postimages.org/
make your own account, make a new folder, upload all photos of this specific job in that folder and share all links.
Those photos are there indefinitely, AFAIK. Except if YOU delete them :)

Re: Noisy radiator cooling fan

Posted: Sun Feb 09, 2020 7:25 am
by DaveinOlyWA
davidmpye wrote:
Thu Nov 14, 2019 6:59 am
PS I have lots of photos of the repair- is it possible to attach to posts?
You can from

Dropbox
Google photos
Amazon photos

The top two are free with limited storage (although rather ample. Well more than enough for public postings purposes)