Temp gauge not rising
- Thread starter Bigman685
- Start date
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discool
Well-Known Member
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- 13,609
Normal for a diesel so remove the viscous fan, there are a few threads on the subject already.
thebiglad
Well-Known Member
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- 7,387
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- Central France
It's not normal at all. It indicates a problem in the cooling system.
I suspect that the thermostat is staying open all the time, or has been removed. As a result your engine is being over-cooled, which is not a good thing.
Drain coolant, remove old 'stat and install new one. Then re-fill coolant circuit initially via the radiator top plug, then via the header tank and finally via the 'stat housing.
Allow the engine to tickover for perhaps 20mins to bleed, then re-check the level in the header tank.
Now check the temperature of the top hose and, with the viscous fan removed, check across the whole surface of the rad. to ensure the coolant is passing right through.
On TDi engines it is very common to run them without the viscous fan, particularly in winter. Just leave it in the boot of the car - just in cases.
A properly running Disco TDi should be a very warm place to be during winter, if it's not it needs looking into.
Dave
I suspect that the thermostat is staying open all the time, or has been removed. As a result your engine is being over-cooled, which is not a good thing.
Drain coolant, remove old 'stat and install new one. Then re-fill coolant circuit initially via the radiator top plug, then via the header tank and finally via the 'stat housing.
Allow the engine to tickover for perhaps 20mins to bleed, then re-check the level in the header tank.
Now check the temperature of the top hose and, with the viscous fan removed, check across the whole surface of the rad. to ensure the coolant is passing right through.
On TDi engines it is very common to run them without the viscous fan, particularly in winter. Just leave it in the boot of the car - just in cases.
A properly running Disco TDi should be a very warm place to be during winter, if it's not it needs looking into.
Dave
discool
Well-Known Member
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- 13,609
Well u did say your heater was blowing hot so nothing wrong with the engine/coolant tempreture is there.
With a cold viscous coupling it will be semi locked until the viscous fluid circulates within the coupling, u shouldn't be able to 'spin' the fan by hand but only move it by the distance of one blade at a time, with the engine running u may hear the sound of the fan change after around 30 seconds, but that may depend on how noisy your engine is in the first place.
With V8 is sounds like a turbine but then disappears 100 yards down the road but will return when the viscous fluid thickens ie. with a hot engine, hot engine bay on a hot day.
As stated the Tdi is a cool running engine, designed so in theory it can be left running all day if required with a working vehicle.
winchman
Active Member
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- 746
I assume its the correct stat?
I was supplied the wrong one by a local motor factor
thermostat - Australian Land Rover Owners
I find it hard to tell if the fan is working correctly or not, I would love to remove it and fit an electric one but just haven't the funds
Well after the new thermostat the heaters are defo getting hotter and the temp needle does seem to sit alittle higher, Iv now removed the viscous fan and ran it about abit today all seems very well hot warm blowing nicely and temp looks good , I'll see in the Morning if it warms up any quicker,
Had to borrow the misses car earlier to nip to b an q for a 1/2 bsp radiator bung as I managed to snap the plastic one on the thermostat housing much better with brass, thought about fitting one with a bleed valve?
Had to borrow the misses car earlier to nip to b an q for a 1/2 bsp radiator bung as I managed to snap the plastic one on the thermostat housing much better with brass, thought about fitting one with a bleed valve?
heggars
Nec flectitur nec mutant
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- Dover, Kent
Why not, saves taking the whole nut off
discool
Well-Known Member
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But then the 300 series is self venting via the valves in the coolant reservoir cap.
heggars
Nec flectitur nec mutant
- Posts
- 502
- Location
- Dover, Kent
Yes would help if you replace the coolent
Davevx
New Member
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- 78
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- Harlow, Essex
Mine runs cool with the temp needle near the bottom... Heaters blow out nice and hot so im gonna leave it as it is... Would rather it run cool instead of overheating
heggars
Nec flectitur nec mutant
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- 502
- Location
- Dover, Kent
Good and bad, engine has a temp band it needs to run in, either side isn't good for it
robbh
Crazier than a box of frogs on acid
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- 1,755
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- Edge of the New Forest. Wiltshire
My Viscous fan was removed the day I bought mine. Haven't put it back on since.
Runs all day long at pay and plays at the normal temp with no leccy fan.
Even when the engine bay is caked in mud like this.....
I will be fitting one soon as a precaution when I get round to it. Got one that came off the air con rad so will fit that via a switch.
camaroneil
Member
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- washington, tyne and wear
that engine bay looks great
pauldisco88
New Member
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- 9
wow yes that is a very dirty engine lol
