Fan is on as soon as engine starts
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Fan is on as soon as engine starts - 12/26/2007 5:42:48 AM
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The Image
Posts: 30
Joined: 9/2/2006
Status: offline
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Hi and merry christmas.
The fan comes on straight away on a cold start. Is this normal?
I've been having heater probs and wonder if this could be the cause or do all discos have a fan that's permanently on?
If the fan is 'not' supposed to be on all the time, what could be causing it to be always on and how do I remedy it?
< Message edited by The Image -- 12/26/2007 5:43:26 AM >
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1994 Discovery TDI 2500 L Reg
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RE: Fan is on as soon as engine starts - 12/26/2007 6:23:18 AM
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Disco Mike
Posts: 11161
Joined: 4/27/2006
Status: online
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Have you checked your coolant leavel, maybe too low to heat up the truck and also the temp sensor may not be able to read thye temp. Or the temp sender is failing or shorted.
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Mike
Retired service manager. Member of the Solihull Society, NCLR club,past member of the SCLR club and Santa Barbara 4 Wheelers.
99 D2, 3" lift, lockers, H.D. axles, 4:11 gears, Custom front and rear bumpers, Warn winch, HID lights and an Engel 45.
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RE: Fan is on as soon as engine starts - 12/26/2007 10:23:49 AM
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The Image
Posts: 30
Joined: 9/2/2006
Status: offline
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Checked the coolant level which was ok and then bled any air out (there wasn't much) but noticed the fan comes on as soon as the engine starts and I was wondering if a previous owner could have bypassed the thermo (like they used to do in the old days with a hairpin). If so, how would it be undone?
Oh, another observation, the brass nut at the top of the radiator had no thread on bolt or hole, is this normal? It simply pushed in or pulled out.
I have a long journey from my area (Peak District) to Leicester and then from there to Conwy castle tomorrow night so hoping all will go well. My pal has let me borrow his 40ft yacht in Conwy marina which is at the foot of the beautiful Conwy castle so should have a cool new years eve throwing a party on his boat and watching the fireworks from the castle as long as the Disco runs cooly LOL.
< Message edited by The Image -- 12/26/2007 10:29:07 AM >
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1994 Discovery TDI 2500 L Reg
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RE: Fan is on as soon as engine starts - 12/26/2007 3:15:13 PM
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okdiscoguy
Posts: 2485
Joined: 2/16/2007
From: Tulsa, OK
Status: offline
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Is your a/c on? The fans come on with the a/c immediately. Another thought is it might be a coolant temp switch. Again, not sure on diesels, but gas one's we have a coolant temp sending unit for the gauge and a switch for high heat that triggers the fans. Might be a bad connection or sensor.
_____________________________
97 Discovery SD-7 156K miles
04 Cadillac CTS 34K miles
Good Oil
number of posts does not = knowledge (unless it is me)
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RE: Fan is on as soon as engine starts - 12/26/2007 6:19:15 PM
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Spike555
Posts: 5964
Joined: 6/22/2007
From: Grand Rapids MI
Status: offline
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It is perfectly normal for the clutch fan to come on when you first start the truck. All of the fluid settles to the bottom of the viscous clutch housing and until it is distrubuted by the fan turning it will be locked up. Just the nature of the beast.
It should only happen when it has set overnight or all day at work. If it is really hot out and you turn the truck off the heat build-up under the hood can lock the bi-metalic spring on the front of the fan too.
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If it ain''''''''''''''''''''''''''''''''t leakin'''''''''''''''''''''''''''''''' it must be empty!
Yes, one man can change the world.
If the citizens are affraid then they are easier to control.
The "Storm Trooper",'''''''''''''''''''''''''''''
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