Has the radiator been cleaned? Might be worth doing if not. Probably better to get the pros to do it, as they will clean out the cores.
This is the type of tester you need and how to use it -
http://media.wuerth.com/stmedia/shop....all/07234.pdf
I suggest testing via the expansion tank after a short drive. That way there should be a build up of combustion gas in there and safer than removing the radiator cap of a hot engine. Maybe use a bit of tube on end of tester to get close to the coolant level in the expansion tank. Good luck and I hope you do not need a new head.
Nev.
This is the type of tester you need and how to use it -
http://media.wuerth.com/stmedia/shop....all/07234.pdf
I suggest testing via the expansion tank after a short drive. That way there should be a build up of combustion gas in there and safer than removing the radiator cap of a hot engine. Maybe use a bit of tube on end of tester to get close to the coolant level in the expansion tank. Good luck and I hope you do not need a new head.
Nev.
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