16 replies to this topic

[johnnysti]

Hi all

Got my new engine from MED on thursday and im trying to put all the bits on it before i drop it into the car but im not sure which way around the fan is meant to go?

Does this look right?
http://img.photobuck.../correctfan.jpg

Thanks

Johnny

[JoeBodge]

have you got the fan belt pulley on? it looks v. close to the water pump ??

[johnnysti]

Sorry

This is how it stands at the mo
http://img.photobuck...nnyst1/fan1.jpg

Having a real nightmare with the whole engine change. None of the origional bolts fit the new engine and am really pulling my hair out so want to get this right before putting it in the car!!

Johnny

[Big_Adam]

Fan spins clockwise when looking at the waterpump straight on.

[MiniKid..]

Why 2 blade?

[johnnysti]

So is it the right way round?

[Big_Adam]

spin the pump clockwise. If air blows in your face then its the right way round. If not then it isn't.

[The Matt]

Wrong way around I think.

There is a ridge in the centre of the fan that faces towards the radiator. The fan should sit flatter on the pulley then mate.

[GraemeC]

As per MME, the raised part of the fan centre should point to the rad thereby giving the blades a nice flat surface to bolt onto the water pump face.

[dklawson]

The fan shown in your first picture link is backwards.

The fan spins clockwise when looking at the pulleys. Rotating in that direction the fan should cup air and push it towards you (through the radiator). 2-blade fans are almost exclusively racing items. You're not using this on the street are you? On a street engine you might be better off with the 6-blade tropical fan.

[cornflakes5210]

sorry to but in but whats the difference to two blade and standard fans?

[stickycreambun]

erm...one has 2 blades...others have 6, 10, think theres a few others too.

[Mini Mad Rich]

I'd of fort that a 6+ blade fan would be better for cooling espeacaily when you sitting in traffic going no-where?

Rich

[Dan]

The 2-blade moves a lot of air, a real lot. Using two of them to make a 4 blade is better still but they are really loud. The late plastic 13 blade actually moves more air than the tropical 6 blade I think and is much quieter, also far better ballanced as it has an odd number of blades. Blades with even numbers of fins have more harmonic vibrations when running.

Mini Mad Rich, more blades doesn't always mean more cooling. You have to consider the size of the blades and their strength (metal ones flex less in use so move air better, despite the aerofoil cross section of the plastic blade trying to counter the flexing). You also have to consider the effect of a blade on the one following it, they leave turbulent air behind them so each has less air available to move then it would in a case where the blades were more spaced out.

[Mini Mad Rich]

Cheers Dan, I didn't think I was right lol.

Rich