You can easily confirm this if you get an IR thermometer and measure
the temperature of both the inlet and outlet of the radiator when the
engine is warmed up. You should see a noticeable temperature drop
from inlet to outlet, even with the car sitting still and idling. A
good justification
It has been my experience that if the core is clogged, a citric acid flush is
not going to accomplish much, ad the solution can't get to the clogged portion
of the core. That is, it can't flow past or through the clogged areas.
It may clear out the parts that are partially clogged, but the
So my '84 190D has always run hot, the needle would go up to around 95 and drop
back down and up and down slowly while driving but it was never an issue, now
with the arrival of warmer weather it seems to be getting worse.
So yesterday I put a thermostat in it, Rusty had sent me one some time
With hot and running look around for leaks. As for why it is running hot i
would guess the radiator is clogged. Does the electric fan clutch kick in?
Sent from my iPhone
On May 21, 2011, at 8:34 AM, Curt Raymond curtlud...@yahoo.com wrote:
So my '84 190D has always run hot, the needle would
Pressure test -- leaks are obvious by drips or hissing.
I would guess you do not have a functioning main fan -- they have an
electric clutch on that model, and you are only getting cooling from
the electric fan, hence heating to 95C or so up and down.
If the fans work properly, and there
So my '84 190D has always run hot, the needle would go up to around 95
and drop back down and up and down slowly while driving but it was
never an issue, now with the arrival of warmer weather it seems to be
getting worse.
If it's not the thermostat, chances are that it's the radiator.
Try a
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Saturday, May 21, 2011 10:19 AM
Subject: Re: [MBZ] Hot 190D
So my '84 190D has always run hot, the needle would go up to around 95 and
drop back down and up and down slowly while driving but it was never an
issue, now with the arrival of warmer
Another thing to consider - does it run hot at or above a certain speed? If
so, it's clogged.
Dan
From: LWB250 lwb...@yahoo.com
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Saturday, May 21, 2011 2:29 PM
Subject: Re: [MBZ] Hot 190D
If you pull the radiator, just stick
...@striplin.net
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Hot 190D
Message-ID:
sig.51227a60db.3fe3c30b-c472-4966-8ae8-094fc8ad5...@striplin.net
Content-Type: text/plain;charset=us-ascii
With hot and running look around for leaks. As for why it is running hot i
would guess
: Saturday, May 21, 2011 2:29 PM
Subject: Re: [MBZ] Hot 190D
If you pull the radiator, just stick a garden hose in the inlet and see how
much comes out the bottom - you'll know if it's clogged.
?
Not uncommon for a radiator to be clogged in a car that old.? Usually under
$100 to have it rodded out
, May 21, 2011 8:10 PM
Subject: Re: [MBZ] Hot 190D
Doesn't seem to be speed dependent, does seem to be load dependent.
Specifically if I'm coming up an incline in high gear with low rpms...
-Curt
Date: Sat, 21 May 2011 11:31:18 -0700 (PDT)
From: LWB250 lwb...@yahoo.com
To: Mercedes Discussion List
I expect you're right, it hadn't occurred to me to try the IR thermometer, I've
got one, will give it a shot.
-Curt
Date: Sat, 21 May 2011 17:25:17 -0700 (PDT)
From: LWB250 lwb...@yahoo.com
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] Hot 190D
Message-ID: 363589.99351
radiator from my
experience. And I've had a couple of them in both 123 and 126 chassis cars.
Dan
From: Curt Raymond curtlud...@yahoo.com
To: Diesel List mercedes@okiebenz.com
Sent: Saturday, May 21, 2011 8:10 PM
Subject: Re: [MBZ] Hot 190D
Doesn't seem
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