Thank for the suggestions. Where I live, I don't have the option for a garden hose to run for 20-30 minutes. What I have done instead is to pour gallon jugs of water through the heater core radiator, and engine. I am not sure if the garden hose has enough pressure to make the process go faster than pouring gallons in by hand.
The problem has been the coolant is still getting dirty. I don't think the engine is making rust, but there must be some sticking to parts that is slowly coming out. Similar to how synthetic oil can clean out an engine over time. The weird part is how the coolant separates, with the heater core or expansion tank seeming to have more rusty water than the radiator. I think this must happen after the engine cools off. I would think the water pump moves the coolant around enough that it remains mixed when the engine is running (except for the expansion tank). On Sat, Jun 2, 2012 at 10:05 PM, Scott Ritchey <ritche...@nc.rr.com> wrote: > 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 > _______________________________________ 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
