Don't confuse people, if it is good enough to drink it is good enough to go
in the engine.
----- Original Message -----
From: "R A Bennell" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" <mercedes@okiebenz.com>
Sent: Tuesday, May 29, 2007 1:52 AM
Subject: Re: [MBZ] can some one help on coolant in 190E
Remember however, that with any Mercedes it will be imperative that one
use only the best synthetic water to mix
with the MB specific coolant.
Randy
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Craig McCluskey
Sent: Monday, May 28, 2007 10:41 AM
To: Mercedes Discussion List
Subject: Re: [MBZ] can some one help on coolant in 190E
On Mon, 28 May 2007 08:16:34 -0400 "kok.hong" <[EMAIL PROTECTED]>
wrote:
Then I filled it up with MB coolant (no mixing) and drove it.
You should mix your coolant 1:1 with water (dilute it to 50%
concentration).
Questions:
1) did I screw up the ratio in MB coolant and water?
Did you dilute the coolant?
2) is there a way to measure the specific gravity instead of ratio?
Yes, the small plastic gauges Prestone makes to measure the freezing and
boiling temperatures of coolant actually work by measuring the specific
gravity.
3) drain the radiator and replace with water?
No.
4) is the thermostat faulty? But it was replace about a year ago.
Also, I check the hoses (top and bottom which returns to the
recovery tank) are hot.
....
I had to cool the engine by turning on the window defroster to keep the
engine temp at 90C. Otherwise it is at 100C or more.
Both hoses being hot seem to indicate that the thermostat is opening and
that the coolant is flowing through the radiator. Turning on the defroster
and having the temperature drop shows that there is insufficient cooling,
but that the water pump is indeed pumping water.
Rich Thomas mentioned the possibility of an air bubble. You could
eliminate that by stopping the car on a steep hill (front end up the hill)
and removing the radiator cap, squeezing the hoses to eliminate any air
bubbles, and filling the radiator to the brim.
It seems to me, though, that the symptoms point to insufficient air flow
through the radiator. Does it have a mechanically driven fan or electric
fan? If it's mechanical, is there a thermostatic clutch on the fan? If
it's electric, does it operate?
Craig
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