My rescue 300TD had lots of rust and crap too. I flushed the heater, radiator, and engine individually with a garden hose until only clear water came out. I had an old trigger-style hose nozzle that fit inside the small hoses nicely with the aid of a hose clamp. Fresh coolant (less than 3 years old) should inhibit corrosion.
-----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Brian Toscano Sent: Saturday, June 02, 2012 1:52 PM To: Mercedes Discussion List Subject: Re: [MBZ] Coolant question (related to my Jeep cooling system work) Last night I drained the coolant from the drain plug on the radiator. What came out first was bright green. After a little bit, it turns rusty brown, and then turned to dirty coolant. This was just draining. Likewise, what is in the expansion tank is typically rust colored and when I poured clean water into the heater core, what came out was rust colored. What I removed the water pump what I saw was dirty coolant, but the inside of the engine (outside of the cylinder wall for #1) looks perfectly fine and rust-free. It makes me think the coolant does separate as it cools. The water pump itself looks fine also. A gasket leak developed on the top of the pump after I did the first round of flushing. What has the most crap buildup are the heater hoses. The supply and return to the heater core have a rust buildup inside. The lower radiator hose has a large spring in it almost the entire length and that spring holds a ton of crap. It makes me wonder where all this rust comes from if the inside of the engine looks fine. On Mon, May 28, 2012 at 8:39 AM, Brian Toscano <brian.tosc...@gmail.com>wrote: > I considered that the dark radiator has an effect on the coolant. The > bright green when in the radiator is almost clear in a coolant tester. > However, what's in the expansion tank is darker. The original problem has > been fixed. The flushing I did definitely helped. I'm not expecting 100% > perfectly new looking coolant in 11 year old engine with cast iron block > and head. > > > On Sun, May 27, 2012 at 9:26 PM, Max <meadedil...@bellsouth.net> wrote: > >> Remove a sample from the radiator and another from expansion tank to >> compare side by side; it's awfully hard to judge color inside a dark >> radiator. >> >> Did you fix the original problem? >> >> I think your flushing method failed. >> -- >> Max Dillon >> Charleston SC >> '95 E300, '87 300TD >> _______________________ >> >> _______________________________________ >> http://www.okiebenz.com >> For new and used parts go to www.okiebenz.com >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
