I'll have to take your word re: the B-Series development, but although Daf call it a Paccar product in their literature, when I used to drive wagons, about 20-25 years ago, our Leyland Roadrunners, later Daf 45s were known as having the 6BT and not a Leyland engine. We also had early Eurocargos and at first I thougth the IVECO had by far the better engine and 'box, but the revised Daf 45 showed us we were wrong when they got decent floor and gearlever seals. It also helped that the windscreen didn't leak and the seats were finally seats rather than deck chairs. The fact that they switched from whatever (Turner?) make they used before and fitted a ZF unit instead only added to a superior drive.It gets a bit confusing these days with mass sharing of components.The Cummins-Iveco tie up really didnt happen.It was more a case of Iveco buying in Euro 3 Cummins ISBE then cleverly badging them as Tectors.Which is still happening and even Daf still use them but badge them as Paccar. Before this and probably pre 2000,Iveco were still using there own 4 cylinder and 6 cylinder which shows no resembilance to the fore runner of the ISBE,the 6BTA.In actual fact and from major experiance of both engines,Ivecos own in my opinon was a better engine.From what we,ve heard the FPT 3.0HPI is going to take place of the ISBE.
Going from memory, I think the valve cover was different on the IVECO and the oil filler was in a different place, the IVECO filling from the top through the valve cover and the Cummins from the rear straight down into the sump which seems unnecessary on something that would only be seen by mechanics.
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