After noticing fluctuations in water and oil temps, from normal to cooler, decided to let my fingers do the walking.
It appears that the EGR thermostat on CASA engine ( not on earlier v6, eg. BKS ) could well be the culprit.
Hypothetically speaking, does anyone know if the EGR cooler is not in circuit, can the included thermostat
be deleted as well as the existing circulation pump. This would allow the thermostat housing of the earlier engine to be used.
It is all a matter of plumbing and where the water goes. Just wondering.
Greg