Here's my $.02 if you want it. Let your car warm up for 5 minutes or so in
the warm weather and 10 minutes in the really cold stuff. Just because the
oil pressure guage shows pressure it doesn't always mean EVERYTHING in the
engine is oiled yet. My best friends father used to do a demonstration with
an old Chevy 250 inline 6. He would remove te rocker cover and tell someone
to start the car and watch the manual oil pressure gauge he had under the
hood. The gauge would go up after only a few seconds signifying oil
pressure.....BUT....The rockers were still not getting oil.....Took some of
them a good minute and a half to pump up the lifters and get the whole
engine oiling properly.
My other logic is that different metals expand and contract differently
depending on temp as well. The engine was designed to run at it's "proper
operating temperature" and therefore I would assume that putting the engine
under load at the improper temperature would also mean that many of the
bearings and such are not to thier proper clearances therefore causing undue
wear.
Mike
----- Original Message -----
From: "Bob Rentfro" <[EMAIL PROTECTED]>
To: "Mercedes mailing list" <[EMAIL PROTECTED]>
Sent: Monday, November 28, 2005 11:07 PM
Subject: [MBZ] Cold Weather Get In and Go
We were having discussions today at the old nuke plant about cold weather
starting (well...cold by our standards [39 degrees]). Some were saying as
soon as one sees oil pressure, you can take off like a scalded dog...both
for gassers and diesels. Others say let it warm until it's off the cold
peg. Dr. Booth has always said MB diesels were not intended to idle for
more than a couple of minutes. Since it very seldom gets cold here, I've
forgotten. When I lived in IL back in the day, I just plugged in my 220D
each night when it was cold and the temp gauge was always off the cold
peg.
What's the deal?
Bob Rentfro
'77 300D 144K
Litchfield Park, AZ
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