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My grandma desided to "sell" me her old 93 civic hatchback for a dollar after it sat in a field on her farm for alittle over a year, instead of letting it sit there and die. It came with its own ant colony living inside it somewhere. They stopped driving it cause of an over heating issue no one wanted to fix so it sat. But now it's mine and I've fixed the over heating issue all it needed was a new radiator cap, but since it hadsat for a so long all it's rubber hoses for the cooling system where really worn and began to burst since the system was able to hold a higher pressure with the new and functional cap. Ended up replacing all of those except for 2of them 1 of which is mostly metal also ended up replacing the whole radiator as well as it had a small leak in it where the metal teeth and plastic meet. Now I'm just trying to figure out where this, I'm hoping the last, leak in the cooling system is. I think it's in the head gasket or heat core as it's not a visible coolant leak and air is getting into system it gets in at a quicker rate when i push down on the throttle you'll see the coolant go from having a slow trickle of small bubbles coming up to it looks like a pot on the stove that's over boiling best way i can think to describe it. Also will hear water rush through dash when I start the car and randomly while driving can't detect any pattern to the water moving while I'm driving. If anyone has an idea to where that leak is I'd appreciate it and so would the car I'm trying to bring her back from the brink of death. Look forward to getting help from this forum in the future after i fix the issues the car has I'm thinking about making her a sleeper. oh, just discovered this today not sure if it might be related but theres always warm air coming through the vents even with fans off.

 
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Welcome!
Could be a blown head gasket, did you make sure to bleed all the air out of the coolant properly?

 
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Hey'oh