Vehicle & Technical > Discovery

Viscous Fan Removal

<< < (2/3) > >>

Range Rover Blues:
Definitely left hand thread and like Paul says, it needs special tool #1 (tap with a hammer).
You'll find quite often they don't seem to be working hard at idle, they arn't meant to spin as fast as the engine and should only ever run at about 2,000rpm.  However that still wastes 2 or 3 hp so I'd advise electric fans anyway.

Sooty:

--- Quote from: "Range Rover Blues" --- However that still wastes 2 or 3 hp so I'd advise electric fans anyway.
--- End quote ---

Now then, here is a question that may start a disscution but I am going to ask it.
If the viscous coupled fan uses 2-3hp to move enough air to keep the radiator at a reasonable temperature then if you remove the viscous fan and replace it with an electric one then to keep the temperature down you need to get the 2-3hp to run the electric motor from someware.
Therefore are you not just transfering the drag on the engine from the fan pulley to the altenator pulley?
The only advantage you gain is manual control of when it is on or off so you can stop the fan when driving through deep water.
Remember you don't get anything for nothing in this world.

pritch:

--- Quote from: "Sooty" ---
--- Quote from: "Range Rover Blues" --- Therefore are you not just transfering the drag on the engine from the fan pulley to the altenator pulley?
The only advantage you gain is manual control of when it is on or off so you can stop the fan when driving through deep water.
Remember you don't get anything for nothing in this world.
--- End quote ---


This is true, the power to run the fan does need to come from somewhere, however:

1. The fan doesn't need to run all the time, so it won't be constantly putting a load on the alternator.
2. Because the fan doesn't run when the engine's cooler, it can get up to optimal running temperature quicker.
--- End quote ---

muddyweb:
True..  but when I'm driving my electric fan very rarely comes on.  A viscous fan is always spinning at some speed.

The fan also generates a fair amount of noise.. once again, this energy has to come from somewhere.

I don't know about 2 or 3 HP, but there will be some energy input required from the engine.

Mine is electric for the reasons you mention.. so I can choose when it works.

muddyweb:

--- Quote from: "pritch" ---2. Because the fan doesn't run when the engine's cooler, it can get up to optimal running temperature quicker.
--- End quote ---


I've never really bought that.   The thermostat should keep the coolant from circulating through the radiator until the engine is warm, so the effect will be minimal IMHO.

Navigation

[0] Message Index

[#] Next page

[*] Previous page