In prep for my trip to France I have almost rebuilt the bloody van (love it really)

New shocks, joints, gearbox, new alarm, refurbish engine the works! Just got to check the front wheel bearings and I'm done or so I thought...
Popped the from grill off yesterday to fit my new alarm siren and found a few drips of pink coolant on the radiator!!
Now it's never over heated, in fact it takes ages to warm up being a diesel but it's got me worried for my trip.
I may try a bottle of k seal as I'm a bit low in time but if I decide to do the rad can some one answer this:
All the rads available seem to be of later spec at 44mm wide, will this be ok to fit to me early diesel van?
Cheers all
