Porous head cylinder

Hi !

I have coolant leaking issues potentially mitigated by last servicing repairs but I was advised that the cylinder heads are very porous and holed!
Just left a grand there I can't cope with another big job any time soon I found a product that promises to seal it... for few pounds.

Has anyone tried to use K-Seal?

I have never heard of metal as being porous, with the exception of Metal grates, screen, and Steel Wool.

I had a leak on a Large engined Oldsmobile, and I used the Corvette Radiator Pellets.    It saved me a replace the intake manifold gasket costs.  I got the idea from my Brother who stated that GM is using these in all cars off the line to prevent itty-bitty leaks.

The questions is where is it leaking from?  A outlet flange, a water pump, knowing where it is leaking effects the repair.

I have used Bars leak, before with fair results prior to getting parts together for a good repair.

Alloy wheels can leak air (I had that problem years ago with a MK1 Driver and aftermarket alloys), so not impossible that ally cylinder heads can get porous but not heard that's its a common problem with VWs?

Suspect its probably internal corrosion due to not maintaining the correct level of anti-freeze which contains corrosion inhibitors which for alloy heads is just as important as the anti-freeze bit.

In 60/70s when alloy heads were becoming common lots corroded and leaked or bunged up the cooling system leading to over heating when people ran them with old anti-freeze just plain water in summer which was no problem with 'tradition' cast iron blocks and heads.

 

k-seal can block radiators and water ways,  i wouldnt use it.