in this pic, you will see the nasty green "shtuff" that clogged one of the coolant passages on my SE's motor. what is that stuff anyhow?

 

looks like good old iron oxide to me....
Rust plus coolant = that ****.
Sean

 

Looks like aluminum oxide to me...
Whitish stuff (right side of water pump housing) is definitely aluminum oxide.&nbsp The green stuff is probably aluminum oxide plus coolant to give it a green tinge to it...


-Ted

 

Rusty coolant will be the death of your engine. Ask me how I know.

Before anyone asks why, where do you think the aluminum for the aluminum oxide comes from?

 

 

bumpy

 

the aluminum comes from your water pump and housing.

james