Rust on Water Pump Impeller

[Bozman]

So I am in the middle of changing the timing belt on my 200tdi and the impeller on the water pump has blobs of rust on it. Has anyone seen anything like this before? I am putting in a new pump, but should I be concerned about the cause of this indicating a problem elsewhere?

Thanks in advance.

 

[Viton]

Is your antifeeze 50% distilled water and 50% anti freeze ?

Never use tap water, too many chemicals & minerals.

 

[Bozman]

This is from a "new to me" D90, so I am not 100% sure what the PO used for coolant, but the water/antifreeze did seem pretty "watery" when I drained the system. Seemed like low antifreeze content. I am replacing the radiator as well as part of the process.

 

[AdamSanta85]

My original had some on it too. Not nearly as much as yours though.

 

[Uncle Douglas]

Old formulation glycerin based antifreeze becomes acidic after about three years. Many do not change and flush as they should. It will eat/pit aluminum as well-ie eat holes in your radiator and heater cores..

 

[Bozman]

Old formulation glycerin based antifreeze becomes acidic after about three years. Many do not change and flush as they should. It will eat/pit aluminum as well-ie eat holes in your radiator and heater cores..

It's okay to drink though, right?

 

[Uncle Douglas]

Yep, I hear it mixes well with Vt beers.