Loosing coolant

[truck209]

Had 1976 350c dozers motor rebuilt inline. I don,t operate it my friends do who are loggers but don,t use it for logging they use around camp. We put about 20 total hrs on it and they say they have to keep adding coolant and oil. They can,t see anywhere it,s leaking. The one who rebuilt it said it,s probably the radiator is where it,s leaking but they can,t find any leaks. I,ve completely rebuit the whole dozer. Motor, injecton pump, all under cairrage except rollers. with the 6000.00 I paid for dozer I,m up to 21000.00 and hoped I would have to keep putting money in to this for awhile, any suggestion where its might be leaking fluid. Thanks BOB

[gregjo1948]

Pressure test radiator.