I got under the car, it seems to be coming out of a bolt right under the intake manifold. I'm reasonably certain it's not a hose. Any ideas where its coming from? Head Gasket? Or god forbid, a crack in the block?

 

could be your intake manifold gasket or if it leaks onto the lower a arm like mine does then it is the main water pipe gaskets which I will be replacing soon..... does it only really happen whern you are in Vtec?

 

H23 engine. No Vtec.

It's a REALLY bad leak. You'd think I'd be able to see it, but I've had no luck.

Coolant will leak out almost as fast as I'm pouring it in.

I'm reasonably sure that it's not the intake manifold gasket.

 

which side of the IM is it coming from? by the t-stat housing? it could very well be your IM gasket, though, i can't imagine that it'd be that fast of a leak.

there's a lot of coolant plumbing, and with an older engine, i can see a lot of the rubber hosing going bad after all these years if they've never been replaced.

 

like the monkey said it could be hoses - - several small leaks can equal a big leak. my oil cooler hose was leaking but I also have a water pipe leak from a gasket that leaks when I go into vtec. The only way to know for sure is to drive it then jack the front up crawl underneath it and look for leaks -- but no doubt finding these are a real pain in the ****.....

 

i had a h23 for awhile and i had one of those nasty leaks too and for the longest time i couldnt find it... it turned out to be both of my oil cooler hoses which were the biggest bitch in the whole world to take off and put on. like the suggestions have said you have to drive it until you can smell the coolany burning on ur manifold and jack it up then start looking everywhere!! but check ur oil cooler hoses they heat tup and crack a lot!

 

How come no one suggested a freeze plug ?

 

are you talkin about the allen plug on the back of the block? yeah I quess that could happen but since it is metal and has silicone sealant around it I just do not see it happeing much.