M30 cooling ?

[blingsta]

Hey guys...

what temp should the M30 be running at? ive got a leccy fan set up on mine, and ive adjusted it to come on just before the half way mark!.. well it comes on, but doesnt switch off again!.. while im driving or sitting in traffic, she sitts on half way and only sometimes creeps over until i start driving again! im using the E34 rad which i thought would have been better , or maybe i just need a better fan? what experience are you guys having?? i thought a fan should kick in for 2-3mins to bring temp down and then switch off again !!

[Karan]

welcome to the joys of cooling a big six

whats current fan setup do u have a pic, what cfm does the fan flow?, and i can advise

e34 rad should be fine, theo used one hardcore no probs

[blingsta]

I really dont know the answers to the questions you ask mate... the fan was fitted on the car when i bought it so i just connected it all up... looks big but thin, ! any pics of a good fan to use will be appreciated..

[Rav335uk]

mine did that today, stayed on so i pulled out the relsy to turn it off.But last week, it wouldn't come on, so replaced the relay.It's doin alsorts

[blingsta]

what cfm flow is best ?

[blingsta]

mine did that today, stayed on so i pulled out the relsy to turn it off.But last week, it wouldn't come on, so replaced the relay.It's doin alsorts

mines stays at half, but does creep over if sitting in traffic.. goes back down again while driving but not enough to switch the leccy fan off? i reckon theres gotta be a magic fan out there somewhere that will bring the temp down so much and then switch off to relax for a little while !!!

[Rav335uk]

Mines is usually hovering aroung the 1/2 way and just above mark.

[blingsta]

and fan always on right?

[Rav335uk]

thats right, but then again, i have used a e34 2 pin temp switch.Is there a diff between the m20 and m30 temp switches otherr then the number of pins????

[blingsta]

welcome to the joys of cooling a big six

whats current fan setup do u have a pic, what cfm does the fan flow?, and i can advise

e34 rad should be fine, theo used one hardcore no probs

what does CFM mean ? i take it all fans have different CFM's ?

[charlE30]

CFM = cubic feet per minute IIRC

I'm still using a standard 325 rad with an E30 aircon fan and only ever have the fan on sat in traffic, my normal operating temp is just over 1/4 but in traffic with the fan on it sits just below 1/2.

[blingsta]

and how long does the fan stay on for? mine comes on just before half and just seems to stay on all the time.? it does drop while driving, but would prefer the fan to come on, cool it and switch back off !

[Rav335uk]

Is it through a relay and temp switch????Mine comes on at around half and then goes off when it drops just below.

[blingsta]

yep, running with a relay and temp switch ! what fan you using?

[Rav335uk]

Peugeot 307 electric fan, as i was given a new one for nothing .

[Brianmoooore]

Looking back at the original question, the running temperature of an engine is NOTHING to do with the fan or radiator! The running temperature is set solely and exclusively by the water thermostat.
The radiator's sole job is to provide a resevoir of cooler water, that the thermostat can use to control the temperature, by admitting it into the engine in a controlled manner.
The fan's sole job is to make sure that the water in the radiator is indeed cooler than the engine.

[blingsta]

Thanks for the above Brian, but when a fan comes on, is it ok for it to stay on for long periods? im trying to find out if there is a stronger/better fan that i could be using? although my set up does not overheat, i just think the fan should cut in then switch of after maybe 2-3 mins.. mines staying on for a longer period..

[Brianmoooore]

If the fan stays on when you are driving at any speed, it's either the radiator is inadequate for the job, the thermoswitch switching temperature is too low, or the thermoswitch is too close to the cylinder head.

[Rav335uk]

My thermoswith sits in the 19mm spare on the thermstat housing, i take it i should noe be movin it?

[Brianmoooore]

My thermoswith sits in the 19mm spare on the thermstat housing, i take it i should noe be movin it?

Fitted there, it's measuring the engine temperature, not the radiator temp, and since the temperature where you have it should remain constant, it won't be doing what it should.

[Rav335uk]

Ok so move it to the rad somewhere, but i've got a e34 535 rad, and can't see where to put the sensor????
Whats the next idea mr moooooore