that sucks man!

 

Got it fixed Some jb weld and a lil time and she was good as new its been holding good it was right under the fan. when i unbolted the fan bracket i found it.

 

good luck

 

same thing happened to my 94 12v in my boat cracked my cam gear got a new gear case dowel pins cam gear and cam gear key picked up parts yesterday installing tomorrow, gear case cracked right at a bolt hole lost 7 gall of oil around 5 hrs. its in a boat cant pull over on sholder gotta get home lucky i carry spare oil and fuel filters with basic hand tools

 

Here's a link to a new Cummins timing gear case if you're interested. They also have an aftermarket one for about $80 cheaper.

Cummins Timing Gear Case Housing Dowel Pin 3936256