Leaking water from the back of the cylinder head

[FONT=&quot]Hello to all,[/FONT]
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[FONT=&quot]This is probably covered in the forum but I simply can’t find it.[/FONT]
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[FONT=&quot]My 110 TD5, with 180.000 KM, is leaking water from the back of the cylinder head.[/FONT]
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[FONT=&quot]I’ve took some photos just to illustrate, and from the parts catalogue I can see it’s the Plug Core – 37D2260L.[/FONT]
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[FONT=&quot]The questions I have are:[/FONT]
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[FONT=&quot]Is this normal with this KM?[/FONT]
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[FONT=&quot]Can it be replaced without taking the head off?[/FONT]
[FONT=&quot](what do I need to replace it)[/FONT]
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[FONT=&quot]Does this mean there’s also a problem with the head gasket?[/FONT]
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[FONT=&quot]Thanks in advanced.[/FONT]
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[FONT=&quot]Regards[/FONT]
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[FONT=&quot]Frederico[/FONT]

Does anybody know if there’s any product, like a sealant, we can apply from the outside to simply stop the water from leaking?

Regards

Frederico

There used to be some sort of sealant that you added to the coolant but it is a temporary fix at best. It also bungs up the tubes in the radiator and heater matrix especially if they are already restricted with rust and scale. Some say that a raw egg does the same but I've never tried it.

Thanks.

I’ll definitely go for the plug change.

Can it be done without removing the head?

What kind of sealant must be applied to the new plug?

Regards

Frederico

You could probably get the old plug out in situ but drifting the new one in square may be a tad awkward with restricted access. I normally get them out by putting a dent in the centre of the plug which pulls the sides in and loosens the plug then knock the top of the plug in so the bottom swings out and grab it with pliers or mole grips. Be careful not to gouge the soft alloy of the head though or you will never get the new plug to seal. You can use a very thin film of rtv sealant but it should not really need any for the new plug to seal if the seat face is good and clean.