
What is the part # on the oil cooler
That looks like a "U" series cooler so probably the head is too.
I was wondering if it would work for the d4400 diesel on a no 10, before i bought it someone backed into something and bent it and they just welded it (i know this is not the right word i forgot how to spell the right word) back together it works but it does leak some oil
No, the 4400 uses a full width external cooler. You might have your original cooler repaired. They are fairly heavy construction.
Graham