[Rollin Olin]

Today I was checking the engine of my T5R and noticed that the coolant reservoir had turned dark, very dark and murky. I use the Volvo coolant and last time it was changed was last summer. Last time I looked the coolant was bright green.
All I can think of now is - water pump?

 

[guidowitz]

Re: Murky coolant (Rollin Olin)

Hmmmm, cooling system can mix with oil when there is a bad head gasket, and I reckon visa versa. You would see a sheen of oil in the overflow bottle along with some murk.

Hope this isn't the case!

Not sure why a bad waterpump would do this unless it was badly rusted.

 

[Chow]

Re: Murky coolant (guidowitz)

Do a block test to see if there are any exhaust gases in the coolant...if so chances are you have a blown head gasket.... also check to see if the engine oil looks like milk shake

 

[1999s70]

Re: Murky coolant (Rollin Olin)

I had Volvo do an antifreeze flush and change last summer, and the fresh coolant they used was a dark brownish green instead of the day-glo green I was used to. Apparently they changed coolants, and their new product looks like it needs to be changed as soon as it's put in, though it's perfectly good.

So, just to be sure - are you sure that your observation of bright green coolant was after the change, or might it be your recollection from before the change, and you have the same "new" coolant that I have?

 

[walter leever]

Re: Murky coolant (Rollin Olin)

The question is,is there oil in your coolant?

If yes,prob. the oilcooler wich sits inside the radiator,so a new rad. is required.

Head gaskets don't blow with the 850's normaly,it's rare.

gr,walter