I have a couple questions about the breaking in of the rebuilt 616 that I have put in my '79" 240D. (its the "80" engine from my parts car) I have 100+ miles on it now and have been following the procedure where you get up to 50 mph, let off on the throttle and generally try NOT to stay at the same RMP for too long. The temp is running at 90 to 98c (new radiator & w/pump) and I have not driven over 55. I would expect the temp to run a little high but for how long and am I ready to stop babying her? In regard to the "higher" temps , I bled the air from the system as fast as I could due to not wanting to idle it too long and so perhaps there is still a little air in the system. So my question is "should I expect the temp to drop to normal after 100 miles (its running cooler than when first fired up) or " just how do you know when an engine is broken in?:p

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"