So I just changed out my power steering pump and now it seems I have a coolant leak. I noticed that there is no pressure in the hoses and the level in the reservoir is low. It is not overheating or running hot at all. Any advice? Could it be a bad thermostat?

2004 Land Rover Discovery II S

 

Did you route the belt around the water pump correctly? Just thinking what you could have done to the PS that would have affected your cooling system. Thermostat would do it too, that's just unrelated to your PS pump.

 

yea, i just double checked the serp and it is routed correctly. So, should I think about the thermostat now?

 

Start with a pressure tester to see if you have a leak. If your t-stat is a stock 190 then replace it with a 180 but for no pressure I would suspect the coolant cap. They fail.

 

thanks. i will do that. what do you mean by 180 and 190. when I replaced it about 3 years ago I used the genuine OEM part from Atlantic British.

 

The OEM is a 190 degree thermostat but it makes the engine run at 210 degrees plus which is likely too hot for these engines. Using a 180 seems to keep the temps down in the 190 to 200 range. The hope is that the liners will stay in place longer at these temps.

 

cool. is this the one that you would use then.

Land Rover Discovery II Replacement Thermostat

Thanks

 

That would be the Motorad 180 thermostat which is the generic replacement at 180 which is what I have that you can also get here. There were some issues with a batch of those a while back not opening correctly, not sure of all the details, but mine has worked fine.

The preferred option by many it a genuine LR thermostat in 180.

THERMOSTAT ASSY DII & FREELANDER 180 DEGREES FAHRENHEIT, PEL500110, RNQ028 - Rovers North - Classic Land Rover Parts