I've noticed my radiator fan is knocking quite violently when it shuts down after the engine goes off.
All the blades seem fine, can't see anything physical (from above) that would be causing knocking.
Spinning it by hand it doesn't knock, and 90% of the time it spins very smoothly. 10% of the time it has quite a rough spin by hand wobbling all over the place.
The knock is definitely the fan though, because if i get someone else to shut down the car whilst I'm pressing on the fan assembly it dampens it a lot and I feel the knocking with my hand.
The knock is incredibly loud, about 4 or 5 times whilst the fan spins down.
Any ideas?
The only thread I can find with a similar issue is this one..
https://www.qashqaiforums.co.uk/viewtopic.php?f=29&t=7000&p=59225&hilit=radiator+fan#p59225
Radiator fan loud knocking
- calnorth
- Posts: 2719
- Joined: Mon Feb 11, 2019 2:01 pm
- Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–2021)
Sounds like worn bearings on spin down and causing blades to run out of true (wobble)...fairly typical power down occurrence.
Mk2 Qashqai Facelift - J11b (2017–and onward)
1.6 Dig-T N-Connecta
1.6 Dig-T N-Connecta
Full radiator assembly replacement then or can they replace the bearing?
Got a Nissan Ultimate extended warranty, and can't see anything that would mean it wouldn't be covered. Can't be wear and tear at 45,000 miles surely?
Oct 2014 N-tec+, 1.2 dig-T
- calnorth
- Posts: 2719
- Joined: Mon Feb 11, 2019 2:01 pm
- Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–2021)
If it is the fan:
No change of bearing. Change the fan with its shroud perhaps..yes. See pic which shows the whole fan/shroud that screws to the radiator, so not a complete radiator change.
Might be worth getting the fan/shroud out and inspect first. I have no idea about the quality of this stuff...always expect the worst. If its past the 3 year warranty stuff then the manufacturer won't care...obviously!
No change of bearing. Change the fan with its shroud perhaps..yes. See pic which shows the whole fan/shroud that screws to the radiator, so not a complete radiator change.
Might be worth getting the fan/shroud out and inspect first. I have no idea about the quality of this stuff...always expect the worst. If its past the 3 year warranty stuff then the manufacturer won't care...obviously!
Mk2 Qashqai Facelift - J11b (2017–and onward)
1.6 Dig-T N-Connecta
1.6 Dig-T N-Connecta
Not sure I'm going to be able to get the fan out and have a look at it - according to the service manual it requires removal of the front bumper, draining all the coolant so you can disconnect some pipes that run in front of it, etc... not an easy job.
The fan does spin very smoothly by hand most of the time, the loud knocking seems far too loud to just be the blades/bearing, so I suspect the vibration of the assembly is causing something else to knock against the chassis or something like that. Nothing visible from above, so maybe need to get the engine floor cover off and take a look from below.
The fan does spin very smoothly by hand most of the time, the loud knocking seems far too loud to just be the blades/bearing, so I suspect the vibration of the assembly is causing something else to knock against the chassis or something like that. Nothing visible from above, so maybe need to get the engine floor cover off and take a look from below.
Oct 2014 N-tec+, 1.2 dig-T