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1995-2002 Range Rover P38A
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Discussion Starter #1
I have a 2001 RR 4.6HSE with 200,000 miles on it. Every day I'm loosing about 1/4 inch of coolant in the expansion tank through the overflow tube. Any thoughts on what could be causing this? Any help would be appreciated.

Thank you,
Mac
 

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None that haven't already been given. If you are starting the day at the cold mark and loosing coolant then you are likely dealing with a pressure issue. If you are starting the day above the cold mark you may just be overfilling.
 

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1995-2002 Range Rover P38A
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Discussion Starter #5
None that haven't already been given. If you are starting the day at the cold mark and loosing coolant then you are likely dealing with a pressure issue. If you are starting the day above the cold mark you may just be overfilling.
I'm starting the day at the cold mark -- can you please elaberate on the "pressure issue"?

Thanks much,
Mac
 

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If you do not top it off does the level continue to drop or does it stay steady. If it continues to drop I would suspect a head gasket issue pressurizing the system or a failed coolant tank cap.
 

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1995-2002 Range Rover P38A
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Discussion Starter #7
Thanks for the info -- I replaced the cap last week and the coolant continues to seep out the overflow tube. Could it be a blocked radiator?
 

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blocked radiator would cause overheating, and other issues as it would restrict flow through the engine.

blown head gasket is likely the cause.

it does not have to be a large failure, a small one will do it.

any vehicle with aluminum heads is always suspect to head gasket issues especially if ti was run hot.
 

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1995-2002 Range Rover P38A
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Discussion Starter #9
Thanks for getting back to me everyone -- doesn't sound good does it?
 

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Doesn;t sound bad either. A head gasket job is an easy weekend project. Read up on the hundred plus thread on head gaskets so you have an idea how to proceed with testing/trouble shooting and go from there. No biggie.
 

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2006-2009 Range Rover MkIII / L322
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Also, make sure you use a genuine Land Rover coolant tank cap. I had some aftermarket one from autozone and it wouldn't hold pressure. Coolant would boil out as soon as it got hot.
 

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1995-2002 Range Rover P38A
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I had the same problem, no overheating problems and no leaks anywhere, engine running fine, it was the heater core which I replaced and that has:thumb: sorted it
 

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1995-2002 Range Rover P38A
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Discussion Starter #16
No, I don't smell coolant in the cab, but the the temperature inside the truck seems too warm -- even when I have the HEVAC set at 64 degrees heat is blasting out of the vents.
 

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Climate control will have nothing to do with your coolant loss.
 
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