what do you guys reckon? cracked block?

[Chris@CCM]

head or block prob needs skimed

 

[Texx]

If the engine isn't overheating but the coolant is overflowing, either the rad cap isn't holding pressure or the cooling system is being pressurised via a combustion leak past the head gasket or through a crack in the head. It would be unlikely for the block to crack.

You need to find out what work was carried out when YVS changed the HG. If they didn't have the head pressure tested, head face checked/skimmed and the block face checked/skimmed or decked then I would ask them what you actually paid for? As just throwing a new gasket in there wouldn't have cured your problem.

When the expansion tank overflows you say "open up the hood and sure anuff its come out of my overflow tank,but the overflow tank isnt even full?", can you see any foam or bubbles in the top of the expansion tank?

I'd agree with Ricky and say the cylinder block face isn't flat causing a insufficient HG seal and YVS have wasted your money by not checking it. Pushing coolant out and a cold heater is a good sign of a combustion leak into the cooling system.

 

[ruggiero06]

*update*

ok changed my thermostat and did a full system flush, but the car is still pushin the water into the overflow so much that its causing the overflow to overflow haha, and also am i right in thinkin the overflow is only a one way system jus a dumpin ground for water it doesnt go back into the rad?

also im gettin a lil bit of water out of the exhaust and a bit of white smoke? and she has a slight miss fire wen i start her up, and then it dissapears but soon as i put my foot down she feels like shes miss fireing again?

thats the definition of a blown head gasket buddy. its might not be ur block though as our blocks are iron which makes a cracked block even more unlikely. its most likely your head thats warped. get both ur head and block skimmed to be certain.