Losing a lot of coolant
Losing coolant in my 2002 Pete 387 Cat C-15 6NZ with 975k miles on it. Lost about 4 gallons in 300 miles. Truck has never lost coolant prior to
-No visible leaks under truck
-no evidence of it coming out of the stacks (no smoke or water)
-just got oil sample back and sample is perfect
Any ideas of where it is going?
Is this a good question?