>I have a very strange water leak problem on my '74 MGB engine. After
>driving about 10 miles a small white dried run of water (antifreeze
>residue) will appear. It shows up on the spark plug side of the head about
>3/8" from the top of the head above and towards the front of #3 spark plug.
>I have cleaned off the paint and wire brushed the area . I have looked at
>the area with a magnifying glass and had it dye checked to look for a crack
>or pin hole. I have inspected the area cold, hot, and hot with the engine
>running without finding any indication of the leak. I have never seen the
>leak wet, only the dried residue of the run after driving the car. It's
>almost like water loss through osmosis. The amount of water leaking is
>almost insignificant. I cannot detect any drop in the overflow tank level.
>My concern is whether or not the head has a very thin spot in the water
>jacket because of poor casting, corrosion or erosion. I don't know wether
>or not it will get any worse I'd hate to be going down the road and have
>it blow out. Any suggestions would be greatly appreciated.
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