Quote:
Originally Posted by Old Tele man
Two-part grille shutter system sounds interestingly unique?!?
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My guess is it unblocks the intercooler, egr cooler and what ever other coolers it has before opening the main radiator shutters.
You otherwise can't really grill block a modern diesel as you might have three rows of heat exchangers in front of it that should remain open.
A typical Euro T'stat fully opens at 92*C whereas normal operating temp is 80*C (interestingly, mine seems to run hotter in winter). There would be plenty of scope for grill blocking if it weren't for all the auxiliary gubbins.