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Russ..... ...I'm nottafanna block stop-leak. And while blocks do crack, usually on the outside leftside above the starter, I've never heard of combustion chamber cracks or exhaust valve seat cracks. Not that things like that don't happen, it's just not common weakness. Make certain yer wet exhaust manifold studs arn't leaking into yer exhaust manifold causing you to see mysterious steam out the exhaust pipe. Remember, at certain times of the year, it is perfectly normal to see "steam" out the exhaust pipe before it warms-up. Has 'nuttin' to do with block cracks, just plain temps and humidty. Iff'n its truely leaking anti-freeze, you'll beable to smell a sweet-smell of anti-freeze. And you do realize the necessity of anti-freeze, don't you? And iff'n yer absolutely certain you have a "cracked block", have yer block "magni-fluxxed" checked or "die-penentrant" checked. Your local machine shop is famaliar with these procedures and products. My money is on leaky exhaust stud-nutts aided and abetted by local weather temp and humidity..... ...Dell
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