Mercedes w126 300SD 6cyl. converted.

HI!
im bad in english writing but ill try anyway

i have a w126 280SE from -83, whick is converted with a OM.603.912 engine from -88 (6cyl diesel NO turbo), i have overheating problems... upp to 115 celsius. no mather highway or city driving...

been changing/trying following things..

t-stat twice.. one Whaler and one OEM MB.
visco and fan wings... CHANGED
been mounting oil cooler...
redline waterwetter added to NEW coolant mixture.
rad cleaner mixture.

it seems to have circulation so ther aint problem with waterpump, what i know have no one changed waterpump because circulation probs.

my rad is from -95 a BN OEM MB, BUT it is hot lower down and higher upp cold, i think ive got prob. with my rad.
ive ordered one and i will me mounting it on thursday, i hope my overheat problems will dissappear than.

anyone having an engine room pic on a w126 with OM603.xx engine??

also intressted in other w126 pics, i can other pics on my to if anyone want.