Overheating with coolant in reservoir and coolant leak - Land Rover Forums : Land Rover and Range Rover Forum
 
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post #1 of 10 (permalink) Old 05-30-2019, 05:44 PM Thread Starter
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Overheating with coolant in reservoir and coolant leak

I have a 2004 land rover discovery se7 that is starting to overheat and leak coolant.
I saw a small hole behind and to the left of the viscous fan pulley and it seems to be where the coolant is coming from. Any ideas on where exactly it is leaking from?
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post #2 of 10 (permalink) Old 05-30-2019, 05:59 PM Thread Starter
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post #3 of 10 (permalink) Old 05-30-2019, 06:01 PM Thread Starter
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post #4 of 10 (permalink) Old 05-31-2019, 07:13 AM
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I cannot tell where your leak is coming from based on those pictures.

The fan connects directly to your Water Pump. If you have any coolant coming from that area, then your pump is bad and you need to replace it. If it literally overheated (Needle pegged/red-light on), then you are (9x outta 10) going to be looking at other issues as well.

Maybe post some more pictures and circle where the leak is coming from?

Also, what work have you done on the cooling system as of late (or at all)?

Michael
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post #5 of 10 (permalink) Old 05-31-2019, 08:27 AM
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Remove the bleed screw, start the engine and push the throttle a bit and if you dont get a jet up to the bonnet the pump is gone and then it leaks through the weap hole

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post #6 of 10 (permalink) Old 05-31-2019, 10:15 AM Thread Starter
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I recently replaced the head gaskets and the gaskets for the parts removed to get to the head gasket. The temp needle stays in the middle once it heats up for about 5 to 10 min then it starts to gradually overheat
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post #7 of 10 (permalink) Old 05-31-2019, 11:34 AM
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Unfortunately the Disco temp gauge is not designed for the needle to go up gradually. It stays in the middle while your engine gets hotter and hotter, and then at the overheat point it just jumps into the red in a single movement. The DII gauge will not go up to the red until you hit 121C (250F) which is pretty hot.

That is why everyone says to get a third party temp gauge and plug it into the OBDII so you can accurately track the temp. If you have actually run the gauge into the red, you may have blown a head gasket again.

Not sure what you mean by "it starts to gradually overheat." Are you watching the temps on a third party gauge? What evidence do you have that it is gradually overheating if not a third party gauge?
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post #8 of 10 (permalink) Old 06-01-2019, 06:24 AM Thread Starter
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I'm pretty sure it's the water pump since that's where all the coolant is leaking from, but I think I have a blown head gasket again because I have a misfire on the 6th cylinder
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post #9 of 10 (permalink) Old 06-01-2019, 07:47 AM
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Ouch. Sorry to hear that.
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post #10 of 10 (permalink) Old 06-03-2019, 07:03 AM
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Originally Posted by Bjorn2662 View Post
I'm pretty sure it's the water pump since that's where all the coolant is leaking from, but I think I have a blown head gasket again because I have a misfire on the 6th cylinder
That was my concern when you were saying it was overheating again. It's not even 9 out of 10 in my experience. Once they overheat, it feels like it's more 99%.

I don't know what all you have replaced on this truck already but if you are planning to do the HG again, I would highly recommend you replace anything that's plastic/rubber related to your cooling system, at this time - that you didn't just replace. On the recommendation of a couple forum members, I did just that when I had to do my last HG job and I didn't have a issue with my cooling system for over 5 years, as a result. Heck, the only reason I had issues is because like a dummy, I put one of those cheap water pumps (under $80) in my truck.

That said, the last time I had to perform HG, I replaced the following (as well) -

Radiator
Coolant Reservoir
Coolant Reservoir Cap
Water Pump (buy the expensive one - you won't regret it)
Full Hose Kit w/T-pipe
Thermostat (180 degree type)

Michael
'01 LR Disco II SE7


R.I.P. - 99 LR Disco Series II

For Used RRC Parts: Paul Grant [
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