MB coolant, I know it's been covered but.... - PeachParts Mercedes-Benz Forum

JCSC2 · #1 08-01-2006, 11:03 AM

I am going to change the upper and lower radiator hoses on my 85 300SD myself. Coolant looks good but possibly may be flushed. I am reading and reading conflicting threads on here about the coolant. In 1985 I thought there was only the green stuff. I know this car has had 2 water pumps replaced in by Noble Mercedes. It is a light green kind and looks clean. So what is safe to put in this car to replenish what is dropped during the hose change? Thanks

janko · #2 08-01-2006, 11:06 AM

noble. falmouth?

andmoon · #3 08-01-2006, 11:19 AM

To replenish the green stuff.
To replace zerex zo5.
Don't forget the heater hoses when you do the rad. hoses.

TheDon · #4 08-01-2006, 11:22 AM

the green stuff corrodes the metals i belive, my car sadly has the green stuff and i need to do a proper citric acid flush and put the mbz coolant in

#5 08-01-2006, 11:26 AM

Personally, I would get rid of the green stuff. I would also replace it (regardless of type) unless I knew it was less than 2 years old. The antifreeze is cheap (around $20/gallon) so there is no good reason not to replace it if you need to drain most of the system anyway. You will lose the majority of the coolant when you remove the bottom hose. Try to contain the old coolant so you can dispose of it.

TheDon · #6 08-01-2006, 11:27 AM

Quote:

Originally Posted by Craig

Try to contain the old coolant so you can dispose of it.

also keep all animals away at all times. if you spill any clean it immediatly, animals are attracted to the sweet smell and when they try it end up poisoning themselves

#7 08-01-2006, 11:33 AM

Zerex G-05 can be found at most auto stores for around $10/gallon.

Link

riethoven · #8 08-01-2006, 12:01 PM

Peak global lifetime antifreeze meets MB specification Mercedes Benz DBL 7700.

I don't know if this covers all Mercedes, but I bet it does. I just looked in my owners manual and the spec is not mentioned.

rg2098 · #9 08-01-2006, 12:13 PM

Coolant should be flushed every 2 years regardless. I run the green stuff in mine and I know it is aluminum safe. (Yes I know the head and block are cast iron but there are aluminum cooling system parts). I believe the cause of corrosion is caused by people leaving the coolant in the system for 10 years without a flush moreso then the type.

JCSC2 · #10 08-01-2006, 12:34 PM

Quote:

Originally Posted by janko

noble. falmouth?

Yes, you are correct. Coolant was flushed and changed in July 2005. Wasn't feeling the dealer. I have been in before with my Mom in the past. They kinda put their nose up in the air and act snotty cause were not buying or driving a brand new Mercedes. Will only go there if there is no other choice.
Thanks for the tips, this forum is great!!!

Cephallus · #11 08-01-2006, 02:07 PM

Wait a sec...you're replacing radiator hoses but won't do the valve cover gasket?

JCSC2 · #12 08-01-2006, 02:13 PM

Quote:

Originally Posted by Cephallus

Wait a sec...you're replacing radiator hoses but won't do the valve cover gasket?

Come on now, unscrewing a couple hoses is a much simpler deal than valve cover. Even some say they can do it in the blink of the eye. Besides the cover is not a problem at this point. It seeps but doesn't use much oil. Hasn't used any since June and over a 1000 miles.

tangofox007 · #13 08-01-2006, 02:24 PM

Quote:

Originally Posted by JCSC2

They kinda put their nose up in the air and act snotty cause were not buying or driving a brand new Mercedes.

Just imagine how they are going to act when they realize that you are now working on the car yourself!!! An owner-maintained older vehicle must be a dealer's worst nightmare. Especially now it's costing so much to fuel their yachts.

SirNik84 · #14 08-01-2006, 02:31 PM

What damage does the "green stuff" do? My car has had the green stuff in it as long as I can remember. I don't see why I should change this. The green stuff is available every where and is cheap.

For those of you who are worried about mineral deposits and rust, I’m just going to assume you are not ever putting tap water into your system... because no mater what coolant you’re running you are canceling out its corrosion resistant properties by adding water that is chucked full of minerals and chemicals from the treatment plant...

I run a 50/50 mix of the green stuff and distilled water in my car... what’s wrong with that?

JCSC2 · #15 08-01-2006, 02:54 PM

The more I look at the more it looks yellow. Might be the good stuff after all!
Kinda hard to tell in the resorvoir.