HGF? High Pressure in the cooling system.

Hi All,

I recently sold my cousin a ZS I've had sitting on my drive way for around a year without use.



We got it MOT'd etc and all was fine until he called and informed me the engine bay was full of steam, i got there to find the radiator had exploded [very old and weak] so i replaced this with a known good one i had in my store.



Now when attempting to re-fill the coolant and bleed the air through i noticed the water wasn't really going down, So i tried the 'approved' method of holding the revs at 2.5-3k and slowly allow the coolant system to fill, quickly then the water went down, like an airlock moved but the coolant got hot fast. When adding the cap to the bottle all hoses etc pressurised quickly, the coolant turned into steam and when opening the bottle to allow the pressure out almost all of the water was forced out.



Video:

http://ift.tt/UR87Rn



The heaters inside the car still didnt blow hot despite both the inlet and outlet pipes at the bulkhead being hot, both top and bottom hoses on the radiator hot and ALL highly pressurised until the cap was released.



I assume one of the compression rings in the gasket has blown and its applying exhaust gas into the coolant system as soon as revs are applied, before this everything seems fine, it only pressurises when revs are added.

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