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Discussion Starter · #1 ·
i have a 5 spd 89 gt and i have a mad coolant leak coming from somewhere. the coolant is all over the front of the block. :evil: it looks like it is seeping out from somewhere under the exhaust manifold. i pulled my dipstick and there was no antifreeze on it, so i dont think it is a head gasket (is that a valid way to check?). i might have a crack in the block under the exhaust manifold. :cry: i could use some help on this one. cause my engine isnt overheating but i still have a big leak. thanks in advance
 

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Some ideas, if the stop leak doesn't work.

To: 89EscortGT
This will be long but informative.

If you have a bad coolant leak due to a gasket being blown, stop leak will NOT work 9 times out of 10. If it does, by some miricle, work, the gasket will eventually deteriorate more and the leak will be back.

But i will agree, for small pinhole leaks in radiators, that stop leak is THE answer.

As for a blown head gasket, it is possible but not likely. When the head gaskety blows, one of two things usually happens. Water gets into the combustion chamber and you get white 'smoke' (actually steam) out the exhaust. The other thing that will happen is the water gets in the oil and pruduces a milky coloured mess that is bad for the motor. If neither of these is happening, the chances are the gasket is not blown.

Also possible is that the head may have a crack in it and is letting the coolant out. A good auto machine shop will be able to crack check the head.

The bad thing about coolant leaks is that the coolant can look like it is leaking from somewhere it is not.

Double check all the gaskets for the thermostat (just in case) and other coolant related parts.

Best of luck.
 

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Re: Some ideas, if the stop leak doesn't work.

oneninerj said:
To: 89EscortGT
The bad thing about coolant leaks is that the coolant can look like it is leaking from somewhere it is not.

Double check all the gaskets for the thermostat (just in case) and other coolant related parts.
amen.

get the engine up to operating temp, make sure the water pump has kicked on to make sure there's a good amount of pressure in the system, then lay under the car while a friend squeezes your upper radiator hose. usually, you can tell where it's coming from by where you see the anti-free coming from. you can try stopleak, but unless it's in the radiator, i doubt it will work. it's not made to fill cracks or to seal anything other than aluminum (gaskest, block (is it alum. or iron?). if it's leaking on the outside of the engine, it's a 95% chance it's not your head gasket. your head? possible your block? possible.. a hose spraying coolant? possible.. get a flashlight, squeeze hoses, and see what you find.
 

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Your kid is just getting cute-er, Paul :D

Do any of the freeze plugs on the CVH engines seal off water jackets? If so, it's possible one of them has corroded through. (I'm trying to think of anything other than a headgasket problem that would cause a leak to come from under the header)
 
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