My thinking was that at idle, the coolant flow as well as airflow through the radiator would be low thus allowing the coolant to get to get warmer. Under way, the water pump is circulating coolant more quickly and you have airflow and fan action cooling the radiator more.
But, sounds like the consensus from folks more knowledgable than I is that the monovalve is the likely culprit. Allan On Monday, September 26, 2011 12:50 PM, "andrew strasfogel" <astrasfo...@gmail.com> wrote: > Possible but in my experience less likely. A stuck thermostat is reflected > in lower engine operating temperatures at all times. > > On Mon, Sep 26, 2011 at 10:09 AM, Allan Streib <str...@cs.indiana.edu>wrote: > > > Thermostat stuck open. > > > > Allan > > > > On Monday, September 26, 2011 9:00 AM, "Michael Canfield" < > > slozuk...@gmail.com> wrote: > > > Hello All, > > > The heater in my 83 300d only blows hot air when sitting still at an > > > idle. As soon as I start driving I can feel the air start to cool off no > > > matter how high the temp is set. The temp guage is at 80*C when warmed > > up > > > and stays there unless pulling a hill, then it goes to 90*C if I run it > > > hard. > > > > > > Any ideas on what to look for first? > > > > > > Mike > > > _______________________________________ > > > 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
