rust in water

[robgross1930]

Originally Posted by daveymc29

I also should have mentioned that the engine was boiled out before rebuilding last year, according to the guys that did the machining. Maybe not so good?

Yes, maybe not so good. Depends on what they used which might not remove a tightly clinging rust deposit or remove no rust at all. Also, after they've boiled out the block and do the machine work, shavings from the machine work can fall down in the water jacket. If the machinist is not too lazy he will blow it out with compressed air. However, the cutting fluid used by the machinist can mix in with the shavings and fall down in the water jacket and the shavings will tend to lodge in clumps and stick like glue, especially when the cutting fluid evaporates.