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[markspark]

Hi guys i have just got a 2.5 TD auto and when im setting off it seems to rev more than what i would expect also it sounds like the fan is very loud when you get upto 30-40 mph it seems all normal is this normal
TIA

[tidla]

viscous fan on these??

[markspark]

viscous fan on these??

yes it is viscus fan are these loud normally

[tidla]

i have not got one of these but viscous fans in general doing there job by "locking up" when warm creating more noise.??

[markspark]

has anyone else had this problem is the fan working correctly as it don't sound right to me

[bigtow]

with the engine [size=24]OFF[/size] try turning the fan by hand to see if it has sized up or has been locked . viscus fans do make a lot of noise when working

[Pitchfork]

They also have a tendency to fail 'locked' so are always turning & making a noise akin to a jet engine
Although some advise their removal completely (LH thread BTW) getting a replacement will prove a problem as they are supposed to be stored vertically - do you think that this is likely to happen in parts stores or during transportation?
It's a lot quieter when not fitted or running but there is the risk overheating especially when under load for a time or idling in traffic

[hoofing it]

take it off it will be fine if you have air-con.
mind its a left hand tread and re-fit it when towing.

[markspark]

i have tried to move it and its very stiff to turn so this im taking to mean its faulty if i remove it what has it to do with the aircon i don't understand sorry
tia

[hoofing it]

the air-con fans blow air over both rads when stationary(if its working)the fans are a two stage they run slow all the time the ac is on and increase speed when engine temp hits +90c 

[Andy H]

My brother used to have a Rover 2.6 with a viscous fan that had seized.

The viscous hub is intended to slip significantly even when it is hot. If the hub seizes the fan spins at full engine rpm and can do 3 things:
- make lots of noise
- waste fuel
- break and fire fan blades outwards at high velocity (which is what happened to my brother)

[hoofing it]

My brother used to have a Rover 2.6 with a viscous fan that had seized.

The viscous hub is intended to slip significantly even when it is hot. If the hub seizes the fan spins at full engine rpm and can do 3 things:
- make lots of noise
- waste fuel
- break and fire fan blades outwards at high velocity (which is what happened to my brother)

as you said its a ROVER

[Andy H]

My brother used to have a Rover 2.6 with a viscous fan that had seized.

The viscous hub is intended to slip significantly even when it is hot. If the hub seizes the fan spins at full engine rpm and can do 3 things:
- make lots of noise
- waste fuel
- break and fire fan blades outwards at high velocity (which is what happened to my brother)

as you said its a ROVER

& BMW were so impressed they bought the company (maybe they needed some viscous fans....)

[hoofing it]

My brother used to have a Rover 2.6 with a viscous fan that had seized.

The viscous hub is intended to slip significantly even when it is hot. If the hub seizes the fan spins at full engine rpm and can do 3 things:
- make lots of noise
- waste fuel
- break and fire fan blades outwards at high velocity (which is what happened to my brother)

as you said its a ROVER

& BMW were so impressed they bought the company (maybe they needed some viscous fans....)

[markspark]

the air-con fans blow air over both rads when stationary(if its working)the fans are a two stage they run slow all the time the ac is on and increase speed when engine temp hits +90c 

is there a way of testing the aircon fans does the aircon have to be on all the time for this to work ie the heater set at low temp (would that not do any harm)