Coolant system pressure "vs" gagging at high rotation - Defender Source
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  #1  
Old April 8th, 2014, 09:10 AM
fmrodrigues
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Frederico
2000 Defender 90 SW
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Coolant system pressure "vs" gagging at high rotation

Hello,

Some time ago, when I was driving my 2000 110 TD5 SW, with 180.000 KM, for a few instants it suddenly lost power.

It happened a second time and this time I was able to see the temperature gauge going, momentarily, to the red.

When I stopped I found out there was, more or less, 1 liter missing from the coolant expansion.

(I donít know if this quantity was enough to justify the overheating)

After refilling, everything seemed normal but when I stopped there was water leaking from the back of the head - Plug Core 37D2260L.

(2 photos)

After replacing and checking the coolant level, I went for a short ride.

At high rotation there was some gagging.

After stopping I took the coolant expansion cap off.

(2 videos)

http://youtu.be/-whZRWGWpTk

http://youtu.be/VGHyy9ggiP4

There was a lot pressure inside and the water rose to the opening level.

I donít know which should be the correct pressure value inside the coolant system, but I tested it for exhaust gas and the result was negative.

(1 video)

http://youtu.be/IX3o4CHwV2s

Iím not convinced everything is OK, the gagging at high rotation is still there and the coolant system is always with a lot of pressure in.

Can someone help?

Thanks in advanced.

Frederico
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  #2  
Old April 8th, 2014, 10:51 AM
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leastonce
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Jason England
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have it filled under vacuum ... thats the proper way to ensure no air cavities in the system,
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  #3  
Old May 20th, 2014, 06:43 AM
fmrodrigues
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Frederico
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Here goes a photo from the water pump.
The blades were completely rusted away.
I just hope the overheating didnít damage the head gasket!
I will keep you informed.


Frederico
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  #4  
Old May 20th, 2014, 08:12 AM
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Chris
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Makes me want to question the quality of the antifreeze in the engine.
Good time to check the radiator to. Flush up out to remove debris
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  #5  
Old May 20th, 2014, 08:26 AM
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Bill Adams
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The system should be at about 1 bar under normal driving. This pressure allows the coolant to go over 100 C without boiling. More than that and you probably have a bad head gasket.

------ Follow up post added May 20th, 2014 08:26 AM ------

Quote:
Originally Posted by fmrodrigues View Post
Here goes a photo from the water pump.
The blades were completely rusted away.
I just hope the overheating didnít damage the head gasket!
I will keep you informed.


Frederico
Must be Britpart
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1994 RRC LeWiB "ruining the air behind me"
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  #6  
Old May 21st, 2014, 10:30 AM
fmrodrigues
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Frederico
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Have no idea about the brand, but looking to the elbow I agree with Rocky, the antifreeze wasnít any good!


Frederico
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