Thread: Is she running hot?

Thank you mates for your replies, I have put a list of action to remedy this problem.

1. Replace the thermostat.
2. Check the viscous fan once more ( I have previously used the newspaper method, now I will try stopping the engine when hot and try turning the fan)
3. Fit a VDO temperature gauge and sender
4. Replace the radiator even though it is clean because it was rodded every couple of years

the missing component of the cooling system that wasn't checked is the water pump, but since I have no issue with the heat while driving on the high-way I believe that it is OK

Re the viscous fan - I've never had much luck with hand tests on these, they will always slip a little and it's hard to tell what it's doing when the engine is revving at 2000 rpm. As I understand it, the viscous coupling relies on centrifugal oil pressure inside to perform the locking, a bimetallic strip controls a valve which controls how much lockup there is. The bimetallic strip detects the air temperature of the air flowing over the radiator.

But it should be quite obvious from the cab when the fan has engaged, you'll hear the additional roaring/droning sound, which will quickly dissapear as the radiator cools down.

Viscous fan in my old Rangie was controlled by 2 x 6mm bolts straight through it.
Never missed a beat in the 450000km I put on it.


Martyn

Originally Posted by Bushie

Viscous fan in my old Rangie was controlled by 2 x 6mm bolts straight through it.
Never missed a beat in the 450000km I put on it.


Martyn

I have the same configuration on an old viscous fan somewhere in my workshop, but it makes the fuel consumption soar high. I must confess that is pretty efficient.

Ah - Yes I too have experienced the pleasure of a locked up viscous unit, although that one had seized. Was in a nearly mint 83 Range Rover, whilst dragging a commodore off at the lights, the damned fan exploded, and took out a power steering hose, put a rather neat set of large dents in the bonnet, smashed the radiator, and the fan cowling. I nearly crapped myself with the noise. Made a Huge Mess of the engine bay! So if you do plan to put a bolt in it - it might be worth putting a new set of blades on it, otherwise could be "fun"

Hi,

I am ordering a VDO temperature gauge with the sensor, any idea about the temperature sensor thread size for the manifold of the V8 with carburetors?

I am sorry for asking but I have no access to my 110.

Thank you.

My 1995 300Tdi in the Disco has had both the radiator and viscous fan replaced, so if yours are 1990 originals I'd say they're probably on the way out. My radiator still worked reasonably OK in normal driving when it was replaced 4 years ago, but once it was out it was obvious there was a lot of damage and reduced circulation.

Originally Posted by lebanon

Hi,

I am ordering a VDO temperature gauge with the sensor, any idea about the temperature sensor thread size for the manifold of the V8 with carburetors?

I am sorry for asking but I have no access to my 110.

Thank you.

I have fitted a temp gauge and new sensor as I was not happy with the LR standard. My 110 runs around 86 to 92. I find with cruse on driving slower is when the temp rises.