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Engine cooling fan comes on straightaway

InDenial
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30 Dec 2013 15:39 #98314 by InDenial

Engine cooling fan comes on straightaway was created by InDenial

Hi - Took my Jimny on a 160 mile roundtrip on saturday. Today noticed engine cooling fan coming on straightaway when I start the engine from cold. Radiator and coolant look fine. Suspect thermostat sticking. Anybody else had similar problems? Is it difficult to replace thermostat? Gratefull for any advice. Thank You.

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markyp2000
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30 Dec 2013 16:00 #98315 by markyp2000

Replied by markyp2000 on topic Engine cooling fan comes on straightaway

Thay all do that

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j999pre
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30 Dec 2013 16:34 #98318 by j999pre

Replied by j999pre on topic Engine cooling fan comes on straightaway

As above viscous fan on a jimny not electric.

Gold Jimny the best colour (sold)

Big red Jimny 32" tyres, arbs, cage 5:1 transfer etc. (Sold)

Grey pick up Jimny
Turbo m13a, arbs, floating rear shafts, disc conversion rear, vented front conversion. 245 70 16. Winch, 3" lift, 4:16 trans hd shafts and CVS

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littlegreenjimny
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30 Dec 2013 17:27 #98331 by littlegreenjimny

Replied by littlegreenjimny on topic Engine cooling fan comes on straightaway

they are on a belt so run all the time

other cars only have the electric fan kick in when needed

dont worry!

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2013gary
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31 Dec 2013 09:42 #98415 by 2013gary

Replied by 2013gary on topic Engine cooling fan comes on straightaway

littlegreenjimny wrote: they are on a belt so run all the time

other cars only have the electric fan kick in when needed

dont worry!

You learn something every day lol

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mlines
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Wokingham, UK

31 Dec 2013 09:55 #98419 by mlines

Replied by mlines on topic Engine cooling fan comes on straightaway

As has been said, they are a viscous fan which visually appears to run all the time.

However in fact they are "loose" when cold and "stiff" when warm. This means that they are really just idling when the engine is cold and only really pushing air when it is warm.

The test for this is a rolled up page of newspaper. Stick it into the fan (carefully!) when its cold and the blades will stop, stick it in when it is warm and the paper will be chewed! BigJimny is not responsible for loss of fingers or limbs during this process.

Martin

2003 M13 early KAP build.
3" Trailmaster lift with 1.5 Spacers on front
Customised winch bumper and roll cage
235/85R16 Maxxis Bighorns on 16" Rims, 4:1 Rocklobster, Rear ARB locker and on-board air
Corrected arms all-round, rear disks, Recaro seats and harnesses

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Engine cooling fan comes on straightaway

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