So if the car had a head issue, would the temp drop from almost red zone to normal like that by engine breaking down a hill?
BTW, I've been driving with forced open tstat now and the temp gauge reads stone cold, even after a 15 minutes 65 mph highway drive. It will not budge. Sent from my iPhone > On Feb 26, 2015, at 11:34 AM, Curly McLain via Mercedes > <mercedes@okiebenz.com> wrote: > > gassers control combustion by a flapper in the air intake, controlling > airflow into the cyl. Diesels run at full air flow all the time, combustion > is controlled with fuel. In effect coasting downhill, the fuel is shut off, > no heat occurrs and the cylinders are washed with lotsa cool air. nothing to > generate heat, cept friction. > > > >> Still not sure I understand why engine braking especially down hill would >> lower temps dramatically. >> Perhaps it causes an air bubble to dislodge? >> >> Anyway, I just forced the tstat open with a piece of brass tubing. Let's see >> what that does. >> >> If I get no answers, I will take car to radiator shop. They said they will >> pressure test cooling system and also look for head leaks. About $100 for >> that service. >> Sent from my iPhone >> >> On Feb 26, 2015, at 2:33 AM, fmiser via Mercedes <mercedes@okiebenz.com> >> wrote: >> >>>> dseretakis--- wrote: >>>> >>>> Interestingly, I noticed that heavy engine braking down hill >>>> would bring the temps from almost in the red to normal, but once >>>> I started accelerating the temp would rise again. Wonder why it >>>> did that? >>> >>> At idle, most diesel engines produce very little heat. With the >>> engine forced to turn and pump cold air through it, what little >>> heat the burning fuel made is carried out the tail pipe. >>> >>> So - no heat being generated means no heat for the cooling system >>> to carry away - so no problem! >>> >>> _______________________________________ >>> http://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 >>> >>> All posts are the result of individual contributors and as such, those >>> individuals are responsible for the content of the post. The list owner >>> has no control over the content of the messages of each contributor. >> >> _______________________________________ >> http://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 >> >> All posts are the result of individual contributors and as such, those >> individuals are responsible for the content of the post. The list owner has >> no control over the content of the messages of each contributor. > > > _______________________________________ > http://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 > > All posts are the result of individual contributors and as such, those > individuals are responsible for the content of the post. The list owner has > no control over the content of the messages of each contributor. _______________________________________ http://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 All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
