Posted 5/23/2020 10:34 (#8275106 - in reply to #8275059) Subject: RE: 7140 Magnum/ 8.3 Cummins burns coolant
Dump a couple bottles of Mend-Tite in it and run it to see if your leak disappears. Had a head gasket on an 8.3 leaking externally and did the same. No leaks since 2013.
INDY