E30 fans

[Super_ted]

E30 Fans?? Do they always stay on whilst you drive or do they come onwhen a thermostat triggers them.

Reason being mines stays on all the time and the harder i accelerate the louder it seems to get!!

anys ideas?

thanks

[Jon_Bmw]

Its working then.

[dusty23]

always on

[alane]

Its a viscous fan and not controlled by a switch , its always on but depending on how hot the engine is as to how fast it spins ,something to do with wax in the coupling gets thicker when its hotter .

[rossco_325i]

i took mine out and wired in a electric on. i just dont like the idea of it being on all the time. better for the mornigs if there is no fan heats up nicely!

[Morat]

Thats only true if your thermostat is broken!

[Brianmoooore]

better for the mornigs if there is no fan heats up nicely!

Total rubbish!

[Brianmoooore]

the harder i accelerate the louder it seems to get!!

Sounds like the bearing on yours may have seized, in which case it's costing you a lot of fuel!
How easily does the fan turn, when the engine is cold and stopped?

[rossco_325i]

thats just wat i found.no need to be cheaky! i really put it in for diffing it. just to keep temp down.

[stonesie]

But the fan should have no influance on how quickly the engine reaches its normal temperature as the thermostat should be closed and not letting any water through the radiator untill its warmed up and actually needs cooling.

That's why ''better for the mornigs if there is no fan heats up nicely'' makes no sense unless your stat is buggered or missing.

[gooner1]

thats just wat i found.no need to be cheaky! i really put it in for diffing it. just to keep temp down.

rossco 325i, do yourself a favour mate and listen when Mr Moore talks.
You will get no better advice about all things E30 anywhere, so if he tells you its rubbish, then rubbish it is.

[Rosc0PColtrane]

thats just wat i found.no need to be cheaky! i really put it in for diffing it. just to keep temp down.

No need for text speak either.

[rossco_325i]

with no fan the engine will heat up quicker cause there is less COLD air going through it. witch will open the thermostat sooner. and if it does that then its at running temp quicker. its a fact

[stonesie]

If you are on aboout the airflow around the engine itself then that has so little effect on engine cooling that you would not notice.

The only way i can think of to affect the speed of an engine reaching its thermostat opening temperature is having the heater set to full heat and full fan as the heater matrix is supplyed from the engine side of the coolant circuit.


Or thrashing the nuts off a cold engine, which is quite a dumb thing to do but would heat it up quickly.

[Rosc0PColtrane]

with no fan the engine will heat up quicker cause there is less COLD air going through it. witch will open the thermostat sooner. and if it does that then its at running temp quicker. its a fact

No it isn't.

[rossco_325i]

with no fan the engine will heat up quicker cause there is less COLD air going through it. witch will open the thermostat sooner. and if it does that then its at running temp quicker. its a fact

No it isn't.

ok 10 years in the motor trade means nothing then

[Jhonno]

with no fan the engine will heat up quicker cause there is less COLD air going through it. witch will open the thermostat sooner. and if it does that then its at running temp quicker. its a fact

nice try BUT when cold the stat is closed and therefore the rad is not part of the cooling system. So therefore any cold air drawn onto it by the fan will have no effect on the temp of the engine

Fact!

[Jhonno]

ok 10 years in the motor trade means nothing then

my old man has been in the motor trade for 30 odd years but I dont think the time spent has given him a true grasp of the thermal behaviour of an engine

[Rosc0PColtrane]

[stonesie]

I have met people who have been in the motor trade a lot longer than you and still didnt know what the otto cycle was or that the diff lock on a defender only worked the center diff in the transfer box.

The radiator cooling fan running while the stat is closed is doing nothing but wasteing energy and makeing noise, the radiator gets no heat to dissapate untill that stat opens THAT IS A FACT!!

[rossco_325i]

we r not talking about the rad. it is only used when the stat is open and lets the coolant go round the system.but with no fan the engine heats up quicker. how come any other car that does not hav a viscus fan will get to running temp quicker?

[Rosc0PColtrane]

Surely Stonsie has answered that question.

For the record, my cab got to running temps quicker than any company car I've had.

[Jhonno]

we r not talking about the rad. it is only used when the stat is open and lets the coolant go round the system.but with no fan the engine heats up quicker. how come any other car that does not hav a viscus fan will get to running temp quicker?

the rad cools the engine by drawing air through the rad.. So how can we not be talking about the rad?

you cant compare different cars with getting up to temp, diff engines/engine bays/materials/airflow etc etc

[Chase007]

I say an engine heats inside out so i cant see the fan slowing down the engine in heating up the weather is something that will add to how long it will reach the right temp from a cold start.

[OBs]

Two Rosco's / Rossco's

1 luvs txt speak, whilst the other feels absolute out right repugnance's to such abomination.

[Gibson]

we r not talking about the rad. it is only used when the stat is open and lets the coolant go round the system.but with no fan the engine heats up quicker. how come any other car that does not hav a viscus fan will get to running temp quicker?

The air blowing over the block from the fan would have about as much effect on the warming up of the again as pissing on a 50 acre forest fire...

fuck all