On the Syncro Tour '07 many will remember our Syncro ran quite hot,
and eventually shut down.
The water temp sensor has been replaced.
The Oxygen Sensor has now been replaced with the Bosch (exactly like
Peter's). General running has been pretty good since this replacement.
On our trip to the Snowy Mountains (pics coming soon) the vehicle ran
really quite cold, with the temp gauge often in the white arc, and at
one point below the white arc on a long downhill run at night.
When indicating below the lower white arc, the symptoms of hesitation
re-appeared. Definitely not developing as much power and the same
sense of fuel starvation (may not be this in fact, but the sense of
it) and likelihood of shutdown, just like when it is too hot, became
apparent again. It only happened the one time.
As the hesitations when hot have generally occured on hot days in slow
conditions (less air cooling) and now when cold in fast conditions, it
seems to me the vehicle is quite sensitive to the amount of airflow
available.
In aircraft, we have "cowl flaps" to control the amount of airflow
over the boxer engine to maintain constant / consistent Cylinder Head
Temperatures. A Syncro does not have this of course!
My questions surround:
- do you generally see large variations in temperature through the
winter/summer months
- is it possible to run the engine "too cool"
- is there likely to be some sort of further thermostatic control of
the water cooling system that could be inoperable, bearing in mind the
replacement sensors above?
Thanks
Mark.
PS - when it was too hot, symptoms were:
- high OAT
- low speed
- radiator fan now on
- hesitation under acceleration
- eventual stop
- switch off / switch on does not permit restart
- restart possible after period of cooling
I have not been able to re-test the hot conditions since replacing the
O2 Sensor due to temperature and time constraints!
and eventually shut down.
The water temp sensor has been replaced.
The Oxygen Sensor has now been replaced with the Bosch (exactly like
Peter's). General running has been pretty good since this replacement.
On our trip to the Snowy Mountains (pics coming soon) the vehicle ran
really quite cold, with the temp gauge often in the white arc, and at
one point below the white arc on a long downhill run at night.
When indicating below the lower white arc, the symptoms of hesitation
re-appeared. Definitely not developing as much power and the same
sense of fuel starvation (may not be this in fact, but the sense of
it) and likelihood of shutdown, just like when it is too hot, became
apparent again. It only happened the one time.
As the hesitations when hot have generally occured on hot days in slow
conditions (less air cooling) and now when cold in fast conditions, it
seems to me the vehicle is quite sensitive to the amount of airflow
available.
In aircraft, we have "cowl flaps" to control the amount of airflow
over the boxer engine to maintain constant / consistent Cylinder Head
Temperatures. A Syncro does not have this of course!
My questions surround:
- do you generally see large variations in temperature through the
winter/summer months
- is it possible to run the engine "too cool"
- is there likely to be some sort of further thermostatic control of
the water cooling system that could be inoperable, bearing in mind the
replacement sensors above?
Thanks
Mark.
PS - when it was too hot, symptoms were:
- high OAT
- low speed
- radiator fan now on
- hesitation under acceleration
- eventual stop
- switch off / switch on does not permit restart
- restart possible after period of cooling
I have not been able to re-test the hot conditions since replacing the
O2 Sensor due to temperature and time constraints!